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#1 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo gauge
Hi all!
I haven't posted in years. But, you can be certain when I post something, that its usually quite useful. Many of you may not know, but Blue_71 recently converted his factory 71 2WD long bed from a stock 3-speed transmission to a new, modern-day, 1991 Chevy 5-speed transmission (more specifically, a GetRag NV3500 tranny). He did this to try an get better gas mileage out of a tranny with an over-drive gear. It worked. He had to swap out a cross member on the frame to do this. (That took a few hours of busting out the factory rivets.) But it was well worth the swap! His gas mileage has SKYROCKETED! ![]() The only problem he was having was with the speedometer, which is a manual screw-in cable (from the factory). To convert the electric signal from the modern-day tranny, he used a Cable-X converter box from Abbott Enterprises. They are really expensive to buy, but he found one used on ebay for a really reasonable price. Even tho he bought the box, it came with no manuals, no info, nothin! We could barely find anything online to explain how to set the thing up. The only info we found was on an RX-7 forum (go figure!). However, this company is awesome. We sent them an email, and their tech support responded in less than 2.5 hours! WOW! WOW! WOW! I'm shocked! Anyways, if you want to change your tranny, (or if you already have), but you want to maintain that look of original factory/manual guages (including the speedometer), you should look at getting one of these boxes. It works great! And all the info for setting one up can be found here (on the RX-7 forum). I just wanted to post it here as well, because it seems pretty relevant. Geesh - I sound like I work for this company or somethin.... but they just had awesome, geeky, fast, American tech-support - a rare thing these days! ![]() Maybe Blue_71 can post some more about his swap/conversion to the new tranny, along with the pics of the converter box. I enjoyed helping him with the fix this evening! Thanks a heap for readin' this long post! ~jewels.
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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#2 |
RIP Mr Ron
![]() Join Date: Dec 2005
Location: Big Sandy, Tn. 38221
Posts: 8,166
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Great to see you posting and know that you are still around. Get some picks of the project up and tell of your misadventures along the way. (love the way you tell a story) Anyway hi and hope to see you and Blue 71 at the board meet at my place.
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Ron (Mr Round Tuit) ![]() Be kinder than necessary, for everyone you meet is fighting some kind of battle TN Message Forum TN Facebook Group SETN Truck Show My Photobucket |
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#3 |
1970 Daily Driver
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
How accurate does it seem to be? Does it have any lag in between starting rolling and the MPH reading? I have been waiting on a guy to finish a similar product but I am running out of patience with him. I had heard not so good things about the cable X product but if it is as good as you say I am ordering one tomorrow. I am tired of running with out a speedo and I don't like the look of after market gauges so much. If you have any pictures or info I would be greatly appreciative.
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It's not truly yours if you didn't build it yourself or if you don't do your own maintenance. |
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#4 |
Registered User
Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Jewels!!!!!!!!!
I haven't heard from you since the big move, I guess that has been years! Do you plan on particepating on the board again, or did you go and get all grown up on us? Shawn
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1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE |
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#5 | ||
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Quote:
![]() I haven't been participating in the 67-72 board because I'm not working on a 67-72 truck right now. Granddad gifted me this wonderful mess of a project - a 1958 3200 Apache - and BOY is it ever a mess of a project. No wonder all of y'all restore these 67-72 trucks. They are a heap easier to complete! As for the grown up part - hmmmm - I don't think I'll ever grow up. But I'm still a mechanical engineer, except now I work both as a consultant and as a teacher at a local community college. Fun! ![]() Quote:
![]() ![]() Ok - just for temptation - I'll post a random pic of the 58 Apache, since y'all are asking so nicely, and southern-like. ![]() Enjoy! ![]() ~jewels.
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 07-03-2008 at 12:41 PM. |
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
its about time you came home.
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#7 |
Out of the carpool lane.
Join Date: Jan 2000
Location: Clark Co, WA
Posts: 5,673
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Sounds like it might be different, but I recently got an '89 T-5 with the digital output and took the old analog screw out and stuck it in where the digital output was. It works fine, but I need to adjust the ratio now for my rear gears and stuff.
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1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten... |
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#8 |
Senior Member
Join Date: Jun 2001
Location: Shelbyville, KY
Posts: 3,269
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
I did the NV3500 conversion about 5-6 years ago and except for the speedo, it worked out super. I did consider the electronic conversion deal but the new price was like $350. so I went without. Today you can hook up a elec mapping device and they all give you your speed as well as location which is way cool.
What is the before and after MPG gain?? Mine was about 4mpg highway with the OD. |
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#9 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
lts70:
mine does have a lag, but i honestly think its in my speedo as my needle has started sticking/jumping, and the odo isnt wanting to turn.. its about 5 mph off, but again, i think thats a speedo problem.. it sits on 5 mph when your not moving, so i expected that to be a problem. overall im extremly happy with the cable-x. once you figure out how to set the dip switches, it works great!! i have never seen such responsive customer service either... 2.5 hr response time, after hours, on a week that they are having their yearly shut down. ![]() brad: ive actually heard mixed things on that.. the best i can determine, is that the t5s can have that done but the nv3500s cant. i read in a couple places that the speed sensor on a t5 sits above the output shaft like a normal old manual cable, whereas my nv3500 points directly at the output shaft.. i didnt look to hard into it though after finding a good deal on this cable-x used ![]() huck: your truck was the first reason i did the swap ![]() ![]()
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#10 |
1970 Daily Driver
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Thanks for the info Blue_71. Any plans on switching out your speedometer any time soon? I would be very interested to see if that solves all your delay problems. In fact I will look and see if I still have an extra speedo, if I do I will send it to you if you want.
Huck is there any where I can read up on this elec mapping device? I am not sure if I understand what it does but it sounds cool.
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It's not truly yours if you didn't build it yourself or if you don't do your own maintenance. Last edited by lts70; 07-06-2008 at 12:55 AM. |
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#11 | |
Like a Rock!
Join Date: May 2002
Location: USA
Posts: 1,092
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Quote:
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69 LWB Runs great - work in progress Mess with me and you mess with the whole trailer park! ![]() |
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#12 | |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
i do plan on switching it, but my gauges are custom hand-painted (by jewels.) so i have to sweet talk her into painting another one
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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#13 |
Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,285
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
aaaand just because...
the blue one is Bloo, my first truck; the 5 speed truck.. bought december 9th, 2000. the orangy-reddish one is the fuel injected K20 |
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#14 |
1970 Daily Driver
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Sounds like you don't need the speedo, glad to hear the lag problem is fixed. Any pictures of the Cable X installed? N
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It's not truly yours if you didn't build it yourself or if you don't do your own maintenance. |
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#15 | |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Quote:
![]() ![]() so sweetie, tell me, did the lagging stop? or is the needle still questionable? P.S. if you drive the truck over here this evening (hint hint), i'll take a pic of the gauges and post them here for you, since you are minus a camera these days ![]()
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project Last edited by jewels.; 07-08-2008 at 06:51 PM. |
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#16 |
1970 Daily Driver
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Jewels could you get a picture of the installed Cable X while you are at it?
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It's not truly yours if you didn't build it yourself or if you don't do your own maintenance. |
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#17 |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
.... well, Blue_71 drove over to my house tonight, but he brought the wrong truck! duh!
![]() I think he just left to get the other truck. Don't worry. He only lives a mile away. ![]() ~jewels.
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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#18 | |
Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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Re: HOW TO Convert (modern-day) electric speedometer tranny signal to orig. speedo ga
Quote:
And here are some pics of his gauges: This pic includes the test speedo gauge we used for calibration and such. Here are all the gauges I painted for him: More pics below......
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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