Question about 2001 Pontiac Aztek GT
My overdrive isnt engaging, I drove it in 3rd gear and switched it to drive and vise versa and no change in rpms at 60 mph.
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Posted on Jan 02, 2017
this trans is the 4T65E. It needs a 4th clutch hub. The splines strip off around 120k or more because they weren't hardened from the factory. The new ones have the hardened splines. The trans needs to come out and be partially torn down. I've fixed alot of these. Change the EPC solenoid while you are there. They wear and hang up causing intermittent harsh shifts
You can drive them forever without changing the hub but you'll never have 4th gear
Posted on Apr 02, 2009
I think I understand the question. These transmissions are known for the 4th speed shaft shearing off the splines. 4th being overdrive. This won't let it shift into overdrive and also no engine breaking when you are coasting. In other words, when you are coasting your engine rpms will drop down to idle speed. So when in 3rd or drive manual, you do have engine breaking and the rpms fall slowly. The transmission is gonna have to come out to be repaired. I hope this helps.
Posted on Apr 01, 2011
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