My transmission has suddenly began to shift roughly from 1st to 2nd and then
slips badly in 2nd and 3rd. Motor revs but not much power to the wheels.
I've been given the opinion by a friend who's a knowledgeable mechanic
regarding motors etc, but not so much automatic trannys. Since this
happened suddenly he feels a band adjustment wouldn't help and that it's
more likely to be a seal. Sound reasonable?
First, the dumb questions... fluid level good? How long ago was the last
If the fluid is full, I'd suspect the rear clutch is slipping... the higher
you go in gear, the worse it gets (less mechanical advantage means more load
on the drive side - same reason a worn clutch in a standard manifests itself
in the higher gears first).
Slippage in 3rd indicates it's not as simple as a band adjustment (front
band only used in 2nd). It could be a seal that's causing a drop in
hydraulic pressure, which could be the root cause of the clutch slippage (as
opposed to just worn-out clutches - which is also a possibility). This can
be checked with a hydraulic test (requires hooking up pressure gauges to the
various test ports, running the vehicle on jackstands, and measuring the
pressure), but the reality of it is, you're most likely looking at a
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