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#1 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Transmission Options....
I know this topic is probably one that has been beaten to death, but I
am a relative virgin when it comes to trannys and I didnt see any real write ups. So, be gentle ![]() shift. The engine is a mild 307 with a 2b carb and dual exhaust. Nice driver, but its not a hot rod - and I dont want it to be. What would it take to convert it to auto? And maybe an OD auto at that? Obviously I will need a new tranny, but what ones fit with the minimal mess? Would I need a new driveshaft? Its not a big deal if it does, but it would add to the cost. Pluss a new auto column. But is there anything else I would need to do this conversion? Special shift linkage/cable? Speedo set up? Backup lights? A kickdown so when I stomp on it the tranny will downshift? Im trying to put this in my mind to decide if this is something I want to do. I have always wanted to keep it stock in the past and the 3-on-the-tree has always been a neato feature in my mind. But, the bennefits of an auto seem almost too good. (easy to drive, overdrive, increased mpg, a more engine friendly rpm) I push 14mpg now, think I would see an increase? Thanks guys for your help!
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#2 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Transmission Options....
What rear end gear do you have? Sounds like a 3.08? That's almost too high of a gear for an OD tranny. My 67 has a 350/700R4/3.73 rear gear. I get like 13 mpg city and about 16 hwy. Not a big increase over what you've got. I used a shifter from Lokar. It has a reverse light switch you hook up. Kinda neat. As far as a 700R4 or 200R4 or whatever you really need to set them up properly. You need a torque converter lock-up kit that works with your brake lights so the converter will unlock when you hit the brakes. I had one that didnt work with the brakes and a car pulled out in front of me. I hit the brakes too hard the engine stalled and I had not brakes! (power disks) that was a scary stop. You will also need a TV kit (I hear the one from bowtie overdrives works well) so that it shifts proper. If the TV cable is not set up properly the trans will burn up in a few months. I would also recommend an external trans cooler. You'll also need an auto trans cross member, an auto yoke, and you may have to shorten your driveshaft.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 01-18-2006 at 01:02 PM. |
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#3 | |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Transmission Options....
Quote:
auto? (stupid question) What is a TV kit? (end stupid question) thanks!
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#4 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Transmission Options....
Throttle V...something..... (AKA "kick-down cable). Not a stupid question, two years ago I didn't know what it was or did either. Yup, lokar floor shift. GM had an auto column (with a gear shift indicator), a 3 spd column, and a column with nothing on it (4 speed floor shift trucks). I put in a column with nothing on it and the lokar floor shift.
I edited my earlier post and added some more info at the end.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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#5 | |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: Transmission Options....
Quote:
http://www.tvmadeez.com/article/index.html
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#6 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Transmission Options....
Whats better, a 700R4 or 200R4?
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#7 |
Registered User
Join Date: Sep 2005
Location: Charleston, South Carolina
Posts: 285
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Re: Transmission Options....
Neither is really better, it just depends on which you prefer. The 700 is geared lower in first and second. The 200 is more of a "driver "friendly tranny, because it is evenly geared. If you want breakneck takeoffs from the stoplight, the 700 is the way to go. If you want to cruise and arent worried about racing, go with the 200. If I switch from a manual to auto with my 2wd blazer, I'm going with the 200. Good luck.
SLIMJIM
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1970 Chevrolet Blazer 2 wheel drive - SOLD |
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#8 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Transmission Options....
Ok, here is my checklist:
- tranny (probably 700r4) - aftermarket crossmember to mount tranny - TV kit, cable, bracket etc - Lockup kit (TCC lockup) - auto yoke - new driveshaft - new auto column More questions: - Will an auto column bolt right in where the manual colum was? Or will I need new mounting stuff, or rag joints, or... - What is the "auto yoke". Is it really needed? I could not find one on the Bowtie Overdrive site. (nice site by the way). Is it a idle adjustment to the carb? If so, is there one to bolt onto a stock 2b carb? - Has anyone hooked up the TV kit to a stock 2b? They have a bunch of carbs listed but not this one....
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree Last edited by farside847; 01-20-2006 at 12:43 PM. |
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#9 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: Transmission Options....
Here is a site that will answer a lot of 700r4 Qs for you and they show a universal bracket for the TV cable but I don't know if it is for a two barrel
carb. You would have to contact them. I think the forward end of the manual tranny driveshaft is splined different from the outomotive. Don't quote me on that it's been a while since I worked on a stick. http://www.transmissionhead.com/
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#10 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: Transmission Options....
Yeah, the yoke is the front end of the driveshaft. I know they are different because I had a stock 3sp and went to auto and mine wouldnt work. I think the autos have either a 28 or 30 splined shaft? I went to a junkyard and got one off of another truck. Might be easier to find a complete auto driveshaft? If I remember correctly 700R4 was used from around 82 or so to 92 or so and I think after year 19XX they changed the spline on the tailshaft.
__________________
Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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#11 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Transmission Options....
Ah, it is becoming more clear.
![]() Since I would like the final product to look pretty stock, I would like to use a stock auto column, how does the stock linkage attach to the column and the new 200r4? Easy? Or does it need a custom piece. thanks!
__________________
1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#12 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: Transmission Options....
Again the LOKAR company has a shift linkage that will work with a stock coloum. It's easy to use all the pieces are in the package. Better idea than trying to get all the stock linkage. The LOKAR linkage works better too.
You can get a stock coloum from a 67-72 truck if you dont have tilt now and it's not a big deal to have it. A non tilt coloum can be had cheep as there really is not a big market for them. A T350 uses the same yoke as the 700R. Glad to see you have 3:73's thats a great gear for these trannys to work with.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#13 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: Transmission Options....
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#14 | |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Transmission Options....
Quote:
bar? I checked out their site and it doesnt say what one works best with our trucks. Did you use their backup light switch kit too? thanks!
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree Last edited by farside847; 01-24-2006 at 12:32 PM. |
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