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View Full Version : 4L80e lockup won't disconnect



Raytec
10-08-2017, 11:44 AM
hey guys,

the 4L80e in my stock 2006 Express 3500 6.0 has some lockup problems.
after it has locked up at +- 50mph it stays locked up.
so when I stop/ slow down an pull up again, it doesn't shift smooth anymore but bumps in every gear.
After I shut down the engine for 5 sec and start up again, it shifts smooth again until it goes back in lockup again.
Any ideas anyone?

thanks in advance,

Ray