Hard Shifting 4L80e After Warmup

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bigfootchiro

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Alright guys, so she starts shifting hard after warmup, but doesn’t do it all of the time. During this video, and the rest of the way home, it would hard shift every gear, and would lockup the TC too fast. So much so that the moment it shifts into 4th, it’s as if the TC is locking up with the shift and will stay locked even down to 35 mph, which is lugging the engine. Initially, after install, you had to rev the shit out of it to get it to move. Eventually, that cleared up, but we also had a code for a shift solenoid, just can’t remember which one. I think B, but could be wrong. Going to take it to a transmission shop today for inspection, but would like your guys’ input!

Side note, don’t mind the tach, because it’s way off. Plus, when you see it shift into 4th around 40 mph, the TC locks with it and it shouldn’t lockup until a MINIMUM 45/46 mph.

 

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