OK,I have a 84 4bbl 305 automatic T/A.
When i go to take off like between fist and second gear the car will shift up then shift back down untill i step harder on the gas pedal.after i get out of these two gears it shifts fine.and when i put the pedal to the floor it will not down shift only every now and then.Any help would be great

thanks

[This message has been edited by Trans Am (edited August 09, 2001).]

 

It sounds like a problem with the Throttle Valve in the VB. This valve sends information to the rest of the tranny concerning what load you are putting it under. They tend to stick which is one of the leading causes of failure in a 700. The 1-2-1 problem could also be due to this in that the band might not be holding properly and it reverts back to 1st gear if it breaks loose.

 

Thanks.But whats a VB and how do i fix it

thanks again

 

VB = valvebody; the TV valve and sleeve are in the valvebody. The valvebody's the funny looking thing you see when you drop the pan. I just told a fellow V6 member how to remove his TV valve, the message is here: https://www.thirdgen.org/messgboard/...ML/002330.html

Transfixleo, how would you un-stick the throttle valve? Does it just involve removing it, cleaning it, making sure it and the sleeve are free of burrs, and making sure the valve slides in/out of the sleeve without hanging up? Or, are there other things to check?


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-Tom P (Hot rodded 1986 Firebird 2.8l)

 

The only sure fire way is to reaplce it with the redesigned one that comes in the TransGo Shift Kit or Reprogramming Kit. This has a whole new TV Sytem to operate it so it won't likely ever stick again. By the way, after @1985, they stopped using the sleave nd I prefer not to take the sleave out if it is there because it can have problems going back in.