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#1 |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Edelbrock 1407 with TH400
Hope somebody can help me on this one.
I have an Edelbrock 1407 on my 327 and a TH400 Transmission. When I drove it I noticed that the Kickdown didnīt work. There is a switch next to the carb but I donīt think it was ever hooked up. Does anybody have the same setup? 1407 with TH400? If so, how is your detent switch hooked up? I will probably have to fabricate something to get this switch to work. Pictures would be great.
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-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 Last edited by blukangoo; 06-23-2007 at 04:11 AM. Reason: Pictures were gone??? |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Edelbrock 1407 with TH400
hey.. .I can't help you with that... however, you maywant to look into a new air filter set up. That thing you have there is a HUGE fire hazzard. Everytime you hit the throttle... esp whent he engine is not running, it sprays a little bit of fuel into that foam. All it takes is a small backfire to ignite it. Take it off an d stick your nose in it, you'll see what I'm talking about.
I'd just hate to see your truck burn to the ground. |
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#3 | |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
Quote:
Iīm putting the original on there when I get done with the restore anyways. I just have it on there to keep the carb a little clean.
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#4 |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
I guess nobody on the board has an Edelbrock 1400 series Carb with a TH400?
Maybe I will just try in the General Forum.
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#5 |
Junior Member
Join Date: Jul 2006
Location: Delran, NJ
Posts: 458
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Re: Edelbrock 1407 with TH400
Can't help with the linkage, but great build story/pics. But, hmmm... is that a disc brake proportioning valve? Wasn't that '71 and later? Don't worry, I'm not going to tell the German authorities.
My sister is flying to Strausburg, France tomorrow. Maybe you could cruise over there with your V8's and make her feel at home! While you're at it, invade France. Don't worry, they'll surrender. ![]() Affwee2zane! -Jamie |
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#6 | |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
Nope, I have drums all the way around.
Donīt really know what you are talking about either. Is there something on the picture that I donīt see? Quote:
![]() I need all my money for the truck anyways, canīt afford to drive to France even though Strausburg is only 2.5 Hours away.
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-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#7 | |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Edelbrock 1407 with TH400
Quote:
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#8 |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Edelbrock 1407 with TH400
Please don't double post. It is too hard for everyone to keep straight.
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#9 |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
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Re: Edelbrock 1407 with TH400
Yes, TH400 needs a switch in the electric wire that goes to the side of the tranny to activate the kickdown. In stock applications, the switch is usually located there by the carb, or inside near the gas pedal. The switch you show looks like an original and may work fine with the right bracket (fab'd or bought).
I'm running a TH400 in my 69 with a B&M switch mounted near the carb (Holley now, but once was an Eddy #1406). I doubt you'll find a bracket for that particular switch onto a 1407, but that's just my opinion. It wouldn't take much to make one, but when finished, it'll still be a bulky looking switch. I glanced at the Edelbrock site and didn't see anything listed, but I know my over the counter B&M switch came with a bracket. It's not much prettier than yours, but it is a lot smaller and still should work. I'd call either/both of the two companies' help lines and ask for their recommendations. Best.
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69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
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#10 | |
Junior Member
Join Date: Jul 2006
Location: Delran, NJ
Posts: 458
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Re: Edelbrock 1407 with TH400
That's not a proportioning valve hanging off the brake cylinders?
My sister is visiting her boyfriend, so it probably wouldn't go over so well anyway. She probably wouldn't notice the V8 brothers' cars as American anyway, since she's pretty oblivious to such things. Quote:
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#11 |
Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Edelbrock 1407 with TH400
This a cut and paste from an earlier post I wrote a few months ago, it should answer your questions.
The detent switch for a Th400 is not located on the carburetor, unless your using a Lokar detent shift box. The Th400's detent switch is located on the accelerator pedal. That being said. The Th400 is factory calibrated to shift between approx 3000 and 4800 RPMs dependent on the original factory application/ rear end gear. Three things determine shift points, the transmission vacuum modulator, the transmission governor and load/speed. The vacuum modulator is located on the passenger side just next to the tranny. It has a set screw on it, this is good for minor shift point/ speed adjustments. High vacuum: soft and early shifts, lower vacuum firm and later shifts. I say minor adjustments because this is all in relation to available vacuum. Low throttle = lots of vacuum, high throttle = little or no vacuum, hence the tranny shifts at higher RPM when vacuum is low. You really can't adjust the vacuum when there is none. Ultimately the vacuum modulator is only good for adjusting part throttle upshifts, 200 to 400 RPMs at best, it will not affect WOT upshifts. More importantly is the transmission governor, it overrides the vacuum modulator at about 3/4 to WOT (again because at high RPM there is little or no vacuum.) The governor is located at the rear of the main Trans case on passenger side on a Th400. The transmission governor is controlled by the detent switch (kick down switch) that is usually located on the gas peddle of a Th400 equipped car or truck, unfortunately factory detent switches are non-adjustable. Lokar makes adjustable detent switches, also know as kick down kits; however this kit needs to be relocated from being gas pedal controlled to carburetor controlled. A better and more direct solution is that the transmission governor is adjustable. These adjustments can be made because the transmission governor is composed of weights and springs that are geared to the Trans output shaft. There are two outer (primary) and two inner (secondary) weights, and two springs. The inner, secondary, weights mainly affect full throttle 1-2 and 2-3 shifts. The outer, primary, weights mainly affect the part-throttle 1-2-3 shifts. If your shifts occur too soon you need lighter springs and/or smaller weights. If the shifts are too late, you need stiffer springs. B&M and TCI make governor recalibration kits. Transmission governor adjustments however will take a bit of trial and error to dial in. (As a side note there are usually ink stamp numbers on transmission governors ranging from 11,13,15,17 etc., up to 23, 25 and 27. I do not know the correlation of these #s i.e. line pressure, spring tension, weights, rear gear ratio; but I do know that the higher the # the later automatic up-shifts will occur. A 25 or 27 stamp most likely had a 2.73 or 3.08 factory gear and an 11 or 13 stamp most likely came with a factory 4.56 or 4.11 gear.) The third factor is load and speed and power, taking the above into account the valve body is internally calibrated to up-shift in a predetermined range based on a combination of engine load and speed. They are also designed to downshift when conditions require additional RPM to maintain vehicle speed or more commonly when we nail the fun pedal. To gain total control of a Th400, installation of both a governor recalibration kit, a shift kit and some very light tinkering with the transmission vacuum modulator should do the trick.
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"The Great State of Florida" |
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#12 | |||||
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
OK, here we go! I am going to answer you all in one Reply.
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If I told my wife, pack your stuff we are driving to france, sheīd think I was nuts. We donīt need to go to france. Quote:
Quote:
I was hoping that someone had already did this and had some good pics. I guess I will be the first to put up pics when I get it to work. I already wrote to Edelbrock but I guess I will have to wait for an answer. I checked out the site too for brackets, I think I seen every product they sell looking for one. Thanks for the info anyways. ![]() Quote:
Quote:
Most of that I already knew and the only thing that came close to what I am looking for is the kit from Lokar. ![]() I canīt tinker with anything or try the other stuff until I get the switch mounted. I looked at the modulator I got and the only screw on it is the one holding it on to the transmission. I canīt see any screw for an adjustment. I canīt wait to hear what Edelbrock sais about it. Next week I am going to go to a shop close to here that fixes US cars and see what he thinks. Thanks again for the answers evrybody.
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#13 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Edelbrock 1407 with TH400
The prop valve on your master cylinder is the one for drum/drum so you're okay there.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#14 | |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
Quote:
Thanks for the info. Is it adjustable? Was I right about the warning light or is the wire for something else?
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#15 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Edelbrock 1407 with TH400
The wire is for your warning light. It's not really a proportioning valve since you have drums front and back the pressure they operate at is the same, it's more a splitter block and it's not adjustable.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#16 |
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
Thatīs just about what I thought. Thanks again.
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#17 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Edelbrock 1407 with TH400
No problem.
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#18 | |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
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Re: Edelbrock 1407 with TH400
Quote:
I double checked the Chevelles.com forum before responding, some early Chevy's (67 vintage and earlier) had a TH400 kickdown switch mounted at the carb and it looks just like the picture posted at the top.
__________________
69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
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#19 |
Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: Edelbrock 1407 with TH400
On my TH350 the adjustment screw is inside the modulator. You have to take the vacuum hose off the end to get to it. It requires either an allen wrench or small screwdriver.
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#20 | |
Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: Edelbrock 1407 with TH400
Quote:
Having thick skin I will gladly take your correction squarely on the chin ![]() Generally speaking any early incarnation of the Th400 ie, "Jetaway, ST300, Super Turbine 400, Th375 and the Th425 were used for Cadillac, Oldsmobile, Buick, Pontiac also Jaguar, Hudson, Rolls Royce, Jeep, AM General and Ferrari. Chevrolet cars or trucks did not use these transmissions, think Power-glide in so far as auto transmissions. Sorry for the lengthy history lesson, now to answer the question at hand. The kick-down, detent provision on any carburetor exists by and large for a Th350 tranny. If you have a true early model Th400 (3-speed Super Turbine 400,) that carb detent provision can also be used firstly because an early Th400, Super Turbine, has a switch pitch trans or converter, an early form of lockup. Secondly for the kick down switch. There are two tell tale ways of knowing what Th400 you are working with. See pictures below: If you have two connections on your Th400 it is an earlier model, hence the use for a vacuum carb activated detent switch that activates the converter pitch. So one connection is for the converter pitch and the other connection is for the kick down switch. IDing your tranny will tell you what type of detent switch you should be using, peddle activated or carb activated. Keep in mind that everything I say might be wrong ![]()
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"The Great State of Florida" |
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#21 |
Hand Crafted C-10
![]() Join Date: Aug 2006
Location: Burien, WA
Posts: 5,180
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Re: Edelbrock 1407 with TH400
My '68's have that set-up with Qjets..these pics were sent to me a while back...also a link for the striker--http://www.drclassic.com/catalog/Camaro/Transmission/M00430.html
Do test your switch; new ones are about 175.00! I revived one by soaking it in WD40 for a week (take the boof off 1st). Good luck. ET
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Buying and Selling Code of Conduct Become a Board Supporter! Truck FAQ Ellen... the boards artsy-fartsy, eclectic, truck-lovin' gal-member... |
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#22 | ||||
Neighborhood Pickle Slinger
Join Date: Jan 2007
Location: Cadolzburg, Bavaria, Germany
Posts: 2,224
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Re: Edelbrock 1407 with TH400
Here we go again. Couldnīt write back sooner, I was in the shop.
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Too bad its not an Edelbrock on the pictures but it gives me more ideas. My switch works, I tested it the other day. Now all I need is a bracket like at the link you wrote. I am hoping that Mr. Edelbrock has an idea or a bracket that will work. Maybe they will write back one of these days. Flies and bugs hate WD40 just as much as rubber parts. WD40 is better than a fly swatter. ![]() Here are the pics before and just before we put it back in.
__________________
-------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400 |
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#23 |
Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: Edelbrock 1407 with TH400
You replied, "Did I mention that I have a TH400/375?"
I should have paid attention to your sig, as that explains it all. A Th375 is nothing more than a TH400 with a TH350 output shaft and few less clutches.
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"The Great State of Florida" |
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#24 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Edelbrock 1407 with TH400
KFfreddy, I had a '67 Skylark that had the 2-speed automatic, with a switch-pitch converter, all behind a 350 Buick w/4bbl. I loved the convertor, but I wasn't aware that it was a lockup convertor. I realize it changed pitch, but not that it locked.
You wrote about modulators. My TH400 doesn't have the kickdown attached. I had the valve body modified for firmer shifting, by an old drag racing friend. He put in a small modulator, painted black. He said that the color is relevent, although it may only apply to his suppliers. The only detractor in my situation is the lack of kickdown when I go around corners and wish for a lower gear. So, that has lead me to buy the Lokar stuff....kickdown switch, etc. My truck was sans kickdown when I bought it. It had an Edelbrock 1406 on it. But the thing was jetted too rich and mileage suffered. I could have rebuilt it and changed the jetting, but I decided to buy an Edelbrock Q-Jet 750CFM. This carb is much leaner-running. But it made no difference to the transmission. I have been told of people who put a momentary switch under the gas pedal that would be activated when you floor the pedal. Another way was to just mount a switch inside the cab that you could activate at will. My transmission friend checked my tranny out and there is no problem except for the lack of a kickdown switch/linkage.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#25 |
Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: Edelbrock 1407 with TH400
LoRay,
The tranny you had in your '67 Skylark, was most likely a special order transmission, 2-speed Jetaway trans with a switch-pitch converter, aka variable vane. I mis-wrote by saying it was an early form of lockup and I stand corrected, I seem to be doing alot of that lately ![]() In your situation the lack of a peddle kick down switch, detent, as you explained completely takes the transmission governor out of the equation, as you already know. Hence Zero down shifts at WOT. However modifying your valve body for firmer shifting, I assume the installation of a Trans-Go kit or the like, now gives you full manual control of the tranny but no control of the governor. The Lokar TH-400 Electric kick down Kit that you purchased will bring the tranny governor back into the mix, thereby allowing you to have down shifts at WOT. The Lokar unit will be mounted to the carburetor bracket and the return spring kit mounts to the driver’s side rear stud of the carburetor, bypassing the need for a throttle controlled kick down switch. In so far as mounting a switch inside the cab that you could, hand, activate at will. My answer would be yikes... This method is an old RV trick for anticipation of an uphill climb, surely not something that you want to have to do every time you mash the pedal and have to press a switch at the same time. I will eventually cook the tranny and the converter.
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"The Great State of Florida" Last edited by KFreddy; 06-24-2007 at 06:03 PM. |
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