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To change trans fluid or not?

Elite6

Elite6

New member
Debating this, car 144K miles, trans is good at WOT but at very part throttle (ie. cruise control going up a slight incline) the transmission seems to hunt for the gear (rpm starts boucning between say 1500-2000 rpm). It seems to only be a light throttle problem. at WOT no trouble.

Suggestions on transmission fluid/filter change?

Fyi - my wife drives an 03 Montana, the trans was slipping in first occassionally. I went for a trans fluid flush and **** apparently flew out of trans when they dropped pan. Opening the trans cost me $2K for a new rebuild... GM trans :th_thumb-down:
 


If you feel comfortable doing it, why not get a new filter and even do a shift kit while your at it. Just remember that transmissions need to be meticulously clean. Use lint free rags if your wiping stuff down or coffee filters etc.
 
Drop the pan and change the fluid and filter. Then install a shift kit if you feel like it. It's not a necissity per se. At that mileage do NOT flush it, or you will most likely experience what you did on your wife's montana all over again. I personally don't flush higher mileage trannys just for this reason. You dislodge something in the trans. that was either holding it together or that junk gets stuck somewhere it shouldn't be and bam- new trans.

This most likely will not help your RPM occillating issue. IIRC this is more a cause of the TCC solenoid. Check out Dave's website at tripleedgeperformance.com and read about this issue. FWIW, mine does the same thing. I just don't let it do it via throttle input. Starting to get it in 3rd as well.

For a cheap (free) fix, you can try this-- Disconnect BOTH battery cables then touch them together for 30 seconds, then leave them both disconnected overnight. Then reconnect and take it for a drive and let the ECM relearn. It may run wierd for a few miles so be gentle on it. No WOT runs, lol... See if that takes care of the RPM bouncing.

Oh, and when you drop the pan, REUSE the stock pan gasket. They are meant to be reused assuming there is no damage to it. Don't use the cork or rubber junk that will come with the new filter. No RTV necessary.
 
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