Shakes then dies

The transmission torque converter has a lock-up feature onece you reach a certain speed, probably somewhere around 45 or so, to improve power transfer and feul economy. This directly couples the engine to the transmission and is supposed to unlock once you go below the lock-up speed. Yours is failing to unlock, causing the bucking and stalling. Like trying to stop a standard shift car without depressing the clutch.

Not sure of the fix, but sounds like your problem exactly.

Howard

snipped-for-privacy@webtv.net wrote:

thats exactly what is wrong.it's called a tcc solinoid or swith,it's useally located on the external side of trans,no to bad on most cars to change,it acts like stated above like a manuel trans when you let clutch out too fast while changing gears,it shakes bad and putters and dies,

I just had this exact problem on a 1991 Pontiac Grand Prix just this past week.

I could drive fine, but at stop signs it would die.

It needed a "manifold sensor"..

You are probably running real rich after the 200 miles and it sets the choke/idle wrong.

It cost me $100 with parts and labor from a NAPA certified tech.

snipped-for-privacy@webtv.net wrote:

TCC is not unlocking. That's pretty unusual on a 4T60/65. It's also a somewhat of a major operation to replace.

Thanks for all the responses-I know it's transmission. I just hope it leans towards the cheap fix......thanks again......Burr

it's transmission,but nothing that calls for the trans to be removed fromcar,most people with some mechanical knowledge can get a manual and replace it themselves,it can be time consuming and the part useally runs around $30 to maybe $100 or so at the extreme. good luck,

The part is around $50. This is a 4T60E/65E trans. IMO, it would be pretty difficult for a person of average mech skills with average tools.