I rebuilt the front end today new everything.

Its like a new car now. Gezzz what a difference..no more wandering.


Still have the shifting problem. Let me explain it again.

When driving slow 25 to 30 mph the car shifts (1 normal) then (2nd hard) then (bogs 3rd)..

when driving 40 and over still shifts hard to 2nd and no bog in 3rd.

I was told there is a shift pack in it never heard of one for an automatic with overdrive.

and all of the above symptoms are in regular drive not over drive but does it in over drive also.

could this be a tourq converter problem?
If you have had the same experience please point me in the right direction.Because i know if i go to a tranny shop there gonna hit me hard .

 

tv cable adjusted properly?

 

yes pushed it in full throtle out...still same

 

Its strange no one else has had this problem.hmmmm

 

GM has some funny lockup torque converter programming in the chips of the early TPI cars. Like hitting 2nd and almost immediately locking up the converter a very low speeds causing "bogging", similar to what you describe. Not really bogging, but lugging the engine down rather low.

GM actually had the lockup converter programming changed for the early TPI cars for anybody who complained about it- a different chip, basically. Kinda thing that was available from your dealer.

I don't know much about it other than it's been discussed around here several times and I can confirm that my 86 305 TPI definitely had some very funky converter lockup behaviour at low speeds, similar to what you describe.

I think Vader or others would know more about it- and whether it's still available for you to try out.