transmission shift
Thread Starter
Instructor
Joined: Mar 2007
Posts: 173
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From: Avon Park FL
transmission shift
I have a 77 corvette with a automatic th350transmission .Trans has been rebulit with a shift kit added and a 2500 stall convertor.My ? is is how many times should it shift.
From a dead stop it shifts 2 times once at about 15mph and again at 25mph not sure at mph due to speedo may be not correct. Also I can not get my passing gear to work. I did the adjusting on cable with throttle wide open and pull tv cable out all the way out and connected it.The motor is is 383 with holley 750 vac.The transmission shifts great no slipping .
Thanks
Gary
From a dead stop it shifts 2 times once at about 15mph and again at 25mph not sure at mph due to speedo may be not correct. Also I can not get my passing gear to work. I did the adjusting on cable with throttle wide open and pull tv cable out all the way out and connected it.The motor is is 383 with holley 750 vac.The transmission shifts great no slipping .
Thanks
Gary
Last edited by glo; Nov 24, 2010 at 06:10 AM. Reason: meant kickdown cable
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
2 shifts- 1-2 at about 15-20, then 2-3 about 25-30. Rough guess, shifts depend on road speed and engine vacuum. Adjust the detent cable (for a start), so that it starts to pull on the cable about 1/2 throttle. As the throttle opens, the cable moves the detent shift valve and forces the 3-2 downshift.
