TransGo Reprogramming Kit not much difference
Thread Starter
Racer
Joined: Mar 2008
Posts: 487
Likes: 48
From: Ocala Florida
TransGo Reprogramming Kit not much difference
Have a '76 with a 350 trans that would hardly notice when it shifted so I decided to put a shift kit in. Everything looked good inside and I replaced all the springs, etc. the instructions said. I used the red spring for street cars instead of the orange one that the instructions said were for racing only. After all that work I really don't see a whole lot of difference. Not like others said was a world of difference.
I didn't change any of the springs in the governor since according to the instructions they only determine earlier or later shifts.
Should I have used the orange spring instead of the red? Any suggestions as to why there wasn't the big difference is the firmness of shifts I was expecting?
I didn't change any of the springs in the governor since according to the instructions they only determine earlier or later shifts.
Should I have used the orange spring instead of the red? Any suggestions as to why there wasn't the big difference is the firmness of shifts I was expecting?
Burning Brakes
Joined: Mar 2014
Posts: 904
Likes: 46
From: Crestline CA
I think the change all depends on the original calibration of the trans. Keep in mind that all th350s are not created equal. Id imagine that if you put that trans kit in a low-performance application(say a low hp caprice) you'd notice more of a difference than you would in a trans originally calibrated for a corvette. I once put a B+M kit in a th400 with the calibration of PX(68 firebird with a non-ram air 4bbl 400) and saw almost no change.
BTW, the calibration code is on the tag on the side of the trans, the fist letter is for the division, c-chevrolet, p-pontiac, etc. and the second letter is the calibration/configuration. Typically, not always, the higher alphabetically the second letter the higher performance the calibration is.
BTW, the calibration code is on the tag on the side of the trans, the fist letter is for the division, c-chevrolet, p-pontiac, etc. and the second letter is the calibration/configuration. Typically, not always, the higher alphabetically the second letter the higher performance the calibration is.
Thread Starter
Racer
Joined: Mar 2008
Posts: 487
Likes: 48
From: Ocala Florida
So, is there a way to fix it? Or am I just unlucky to have gotten a tranny that has this type of calibration? Unless you are actually paying attention you cannot even tell when it shifts, even after the addition of the shift kit.
Drifting
Joined: Dec 2011
Posts: 1,743
Likes: 289
From: Chardon Ohio
I installed the TransGo kit in my TH350 last year and absolutely loved it. It did exactly what I wanted. It gives firmer shifts and holds the gears a little longer. At low throttle it isn't that noticeable, only when you're getting on it. I was very happy with it.
Jim
Jim
Burning Brakes
Joined: Mar 2014
Posts: 904
Likes: 46
From: Crestline CA
OK, so once again assumption has led me astray. I was thinking of TH400 when I talked about the ID tag, looks like the TH350 has numbers in a few places but dont really tell you much more than when/where it was built and what car it came in, sorry for the confusion.
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Racer
Joined: Aug 2006
Posts: 363
Likes: 3
From: Norwalk Ca
It's been some time for me, but doesn't Trans Go make 2 versions of shift kits? I remember one was more of an RV application that just improved the firmness of the shift while the Trans Go2 was more of a street/strip application. Which kit did you install?
Race Director
Joined: Feb 2006
Posts: 12,239
Likes: 19
From: Chino CA
I have been reading up on this and a lot of guys recommend drill out the separator plate holes 1-2 & 2-3 to a max of about 0.1400"
How do I know which holes they are though?
There's a lot of freakin' holes on the plate
How do I know which holes they are though?
There's a lot of freakin' holes on the plate
Burning Brakes
Joined: Mar 2014
Posts: 904
Likes: 46
From: Crestline CA
Ahhh, dugs, ya really let me down there, Thot I was gonna gather up some good info, not to hijack, and I don't have a 400 either, but maybe throw that info out here anyway