My transmission has not been enjoying this hot weather here. Recently
it started slipping out of 4th gear. Sometimes it goes to 3rd,
sometime it goes completely out of gear. I checked the fluid level,
and added some fluid. I also added some Trans-X to it a couple days
later. Still no luck.
Checked the level again and realized I had overfilled it. I drained
out enough to get it back to normal, and the fluid was a beautiful red
color, no burnt smell, no dark fluid.
I changed the fluid and filter about two years ago, and did a drain
and fill (no filter change) about 6 months ago when I was diagnosing a
"broken" throttle position cable. Turns out the cable was fine, but
that piston was stuck. I worked it free and adjusted the cable and
everything seemed to be working fine at that point.
I thought it might be the B-2 piston, but the symptoms listed on this
site don't match up with mine.
A few questions:
What do each of the pistons control? (B-1 and B-2) I had assumed the
B-2 because I thought it was for the 3rd-4th gears, but maybe not.
Is there a set of springs or other pistons that could be the problem?
Is it worth doing another filter and fluid change to see if that works
without doing any other work?
Additionally, it was only doing this when the transmission heated up,
but now it does it within 5 minutes of driving. I would prefer to do
the work myself rather than a shop.
Thanks for any help and opinions.