I have a 1997 Pontiac Bonneville Se. Lately, the transmission has been really jerky as it shifts. does it most when it gets hot, didnt know if its the whole tranny or torque converter, fluid is still in good color, hoping its not the whole transmission, should i have a flush and fill done, and put some tranny treatment in, or just consider a whole new tranny?

Yes, Brion, all 1997 pontiac bonneville cars that left the factory to be sold at a new car dealer had a transmission.
That is not to say that all 1997 pontiac bonnevilles had a transmission, but probably 99 % of them did.
New pontiac engines of that year may very well have been used in an assortment of applications, without a transmission.
I hope this helps you.

could be in the tranny valve pac were you put the filter

1997 Pontiac firing order is 165432

THAT CAN BE THE CASE, THE GEAR RATIO CAN BE DIFFERENT, JUST AS THE REAR WHEEL DRIVE CARS, AND YOU NEED TO BE CAREFUL. THE ELETRICAL CAN BE DIFFERENT ALSO, GET THE SAMME YEAR, MOTOR SIZE.

It's upside down but the line drawing (left lower) shows it's location to be Front at the junction of the engine and transmission.

internal tranny problem what you did will not solve problem find a tranny speciallist

gm dealer

CLICK HERE - as you did not indicate the accessories installed.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

8th digit of your vin# needed. Is it an "L", "C" or "K" ?

Im not a transmission expert, but you can visit GrandPrixForums.net and sign up there. A member on those forums that goes by Trannyman95 is a rebuilder of the 4T65E transmission that your car has and should be able to shed some light on what is going on. He is a super nice guy.