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No codes, slipping and banging

M

Momof2

New member
Just bought another Grand Prix and I am having issues with the transmission, obviously why I posted here! Anyway, it slips and hard shifts no matter the temp and shutting it off doesn't help. I am getting no engine light, nor are there any stored codes. Any help would be greatly appreciated! Thanks so much!:th_scratchhead:
 


When you are trying to read it, have you already turned it off and then tried to grab the codes? Most trans codes won't kick the CEL on and reset with the ignition switch. I often suggest, getting the trans to behave badly and not shutting off the car before reading the codes.
 
ya man change out the pcs solinoid and tcc solenoid it helped mine out alot not to bad to do took like 4 hours or so to change out just drop the subframe and lower down that side and you can get to it just take off the side pan and they will be on the left hand side
 
BillBoost37 said:
When you are trying to read it, have you already turned it off and then tried to grab the codes? Most trans codes won't kick the CEL on and reset with the ignition switch. I often suggest, getting the trans to behave badly and not shutting off the car before reading the codes.
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It acts up all the time, not just here and there so there is no getting it behave badly, lol!
 


So, just to clarify a Lil more, it slips upon take off, like driving a manual transmission and slips at each gear change, finally slamming hard into gear once engaged. Doea this upon immediate start up.
 


Drove it a bit this morning, which hadn't really been done starting from cold, usually we let it run a bit first. Anyway, while it was still cold it ran fine, and did not start acting up until it got warmer, also, it seemed if I started off from a stop really slow, it didn't slam into gear as hard.
 
Results after fluid change!

Here is my post from a few days ago, we drained the tranny fluid, fluid was really dark and stinky! There were no shavings in the pan, not even one tiny spec, which I am assuming is a great thing! :th_thumb-up: Anyway, so now after taking it on a test drive, or five, we have gotten rid of all the upper gears hard shifting issue and only the hard slam from a dead stop to start moving when it goes into first gear! Anyone have a clue what this could be? I am so loving this car ad plan on selling my Trans Am so we can keep this one! Hopefully! Even put some new shoes on her today!
http://www.grandprixforums.net/no-codes-slipping-banging-63211.html
As always, any help or suggestions are always very much appreciated! Thanks for all the help in advance!
 


Re: Results after fluid change!

Check the fluid level. If you don't have enough fluid it can't build up pressure...until it finally does and it slams.
 
Re: Results after fluid change!

4THGENCAMAROFAN said:
Check the fluid level. If you don't have enough fluid it can't build up pressure...until it finally does and it slams.
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Double and triple checked! Idk, what is going on. It acts up strangely and differently every time we drive it! Frustrating!:th_angry-teeth:
 
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