transmission slipping all of a sudden 41k Miles ????

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Apr 28, 2025 | 07:37 PM

#11

hummerz

Senior Member

Joined: Jul 2012

Posts: 9,016

From: C-Town

Quote:

Originally Posted by Doc Olds

I have used the Seafoam Trans Tune and it will clean out some crud and varnish. So long as you change the fluid and filter after running it a bit, it can help.

Some years back my H3's 4l60e was stuck in 1?
Transmission fluid was full & clean with DEXVI flushed less than 20k miles ago.
Dropped the pan replaced the 1-2 / 2-3 A & B Shift Solenoid with filter+gasket + Added more fresh DEXVI.
Test drive same result stuck in 1st gear!
Knowing my 4l60e's shift points I knew it was a moisture failure !
My transmission has been shifting perfectly after I opened a can!