it sounds like your tcc (tourqe converter clutch) switch is faulty. this is a common gm problem.
you need to change the fluid. my 99 grand am does that, it feels like you're shifting a manual from 1st to 2nd.
I'd check the transmission fluid level first and then for a slipping band inside the transmission.
because of transmission failure
Very hard shifting between gears accompanied with a bang. That has been my experience in my Pontiac Montana.
broken transmission mount there is a front left, rear left and a center mount
The adjustments are pretty obvious on the the top of the transmission under the air intake and exhaust plumbing.
The adjustments are pretty obvious on the the top of the transmission under the air intake and exhaust plumbing.
could be a bad modulator valve but i would change filter and fluid in transmission first
take off the pan.. pretty sure its in the main body.. hope this helps
Several issues could prevent a 1994 Pontiac Trans Sport from shifting into overdrive, including low transmission fluid levels, a faulty transmission control module, or issues with the throttle position sensor. Additionally, problems with the vehicle's wiring or vacuum leaks could also interfere with the transmission's ability to shift properly. It's advisable to have the transmission system checked by a qualified mechanic to diagnose the specific cause.
it seams when it got hot it shifted but it stop shifting
Yes, the 1994 Pontiac Bonneville SSEi is equipped with various sensors, including a transmission range sensor (or neutral safety switch) that helps the vehicle's computer determine the transmission's gear position. Additionally, there may be other sensors related to the transmission for monitoring performance and ensuring proper shifting. These sensors are essential for the vehicle's overall operation and performance.