'81 280ZX 3SP Jatco 3N71B Transmission Rebuild

[off2sobe]

I'm thinking of buying a non-turbo '81 280ZX. The body and engine are in decent shape, interior needs some help (a lot of help), and the transmission slips in reverse.

I'm thinking of doing the transmission rebuild myself on the ubiquitous workhorse, the Jatco 3N71B. Removal/installation seems to be fairly straightforward on the 280ZX, and this is a simple A/T, so I think this would be a good transmission to cut my teeth on. And...if I zig when I should have zagged, well, I'll tear it out and try it again.

Has anyone done a DIY overhaul on the 3N71B? If so, any insight, suggestions, warnings, writing-on-the-wall, etc?

Has anyone swapped out a 3N71B for the 4N71B (4 sp/OD)?? That may be an option too...rebuild the 4N71B while driving the stuffing out of the 3SP. Anyway...I digress...

I would probably buy a standard master kit from the local transmission supply unless someone can tell me if there is a specific kit that should be used (better materials, high performance, doesn't suck). Rockauto.com has one for $109. -- ATP Part # NM1 {Contains Friction and Steel Clutch Plates, Gaskets, Seals, O'Rings and Sealing Rings}.

Any input would be appreciated if you have some experience with this transmission. Thanks!

[off2sobe]

Hmmm...anyone rebuilt the 4 speed? 4N71B?

[Red coupe]

Only toyotas, but from my experience....Watch for tiny springs, and keep all washers separate....Keep everything separate, there are quite a few little parts.

You wont find many people who have done it, cause even places like dealerships will often just get a rebuilt one and save the labor costs of a specialist...They can be kinda complex so it might not be a bad idea to learn a bit about what all everything is if you don't already know.

In the end though its just parts, if its a spare car go for it...just keep as organized as possible.

Also if you push down on the accumulators on the valve body, fluids gonna squirt some where....quite a few kids found that one out in class