EastTNyota

I have a 1986 pickup the transmission shifts fine till it gets to 3rd then catches 4th almost instantly, fluids are good, solenoid is good.. it has push button O/D and with it off it still kicks into overdrive.. any ideas of what it may be ??

bswarm

Switch, wiring, OD solenoid, OD solenoid o-ring bad or missing.

EastTNyota

All of that is good, I talked to guy earlier today he had mentioned the 3rd gear friction plate, any ideas on that ??

bswarm

Kickdown linkage adjusted ok? From here you'll have to go into the valve body and see if anythings amiss. Those are like brain surgery, lots of springs, check valves, etc. so if you go into it yourself get a breakaway diagram.

EastTNyota

"Bswarm" Yeah kickdown is good and tight.. Where can I find a breakaway diagram, cause that's my next step I reckon..

bswarm

You'll need the trans model, then Google for the valvebody diagram. How many miles on the trans? If over 100k might as well get it rebuilt.

EastTNyota

It's got around 200k, so you recommend on rebuilding it?

bswarm

It's up to you, that's a lot of miles. It is something fun to learn if you want to tackle all or part of it. There's specialty tools needed for compressing the clutch packs and pulling them out for a rebuild. Usually trans rebuilds only require new seals and o-rings, the hard parts including the friction discs hardly ever need replacement.

EastTNyota

Ok I may just get a rebuild kit and go from there, I believe my trans is a "A340F" can you help me confirm that?

bswarm

Here's how to decode the vin plate...
http://www.4crawler.com/4x4/ToyVIN.shtml
It should be accurate as long as somebody didn't replace the trans with something else.

EastTNyota

Awesome thanks for help!!

EastTNyota

NEED HELP!! PLEASE
solenoids are good ,new brake pack.. Trans still hits third for a split second then shifts into O/D and has no power.. Any clues???