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AE94 Corolla with 3 speed: catastrophic failure?

2K views 11 replies 7 participants last post by  XiaoHu  
#1 ·
I bought my 1992 in a town about 30 miles from my house. The only noticeable thing was that while driving above 20 mph you have a loud persistent whining noise that changes with speed.

I decided to attempt to drive it home. I checked the transmission oil both while the engine was cold and off, and while it was hot, running and in park and in drive. In all cases the transmission fluid was correct as far as I could tell.

About 15 miles into the trip I was met by a horrible crunching noise when I went to decelerate from 45 mph. I pulled over immediately and attempted to survey the damage once the car had been idling and I was determined that nothing was on fire. Transmission fluid is still normal. I attempted to put it into reverse and it was met with loud grinding and crashing noises. I did not try drive at that point and just opted to get it towed by AAA home.

I'm a hobbyist I know how to do a lot of things on cars including rebuild a distributor.

My question is what do you all think could have failed? I assume this is the three speed because there was no overdrive button.

I went into this expecting a possible engine overhaul and transmission replacement. The engine though seems to be perfectly fine and doesn't seem to burn a lot of oil.

Because this car is a survivor and has a story to tell I am determined to get it working and driving again. What do you all suggest I do?

I have no garage, and I have some friends who are car savvy but none of them who have attempted a transmission swap in a driveway. Should I just bite the bullet and buy a used transmission and have one of the shops down the street put it in? Should I consider swapping the vehicle to a 5-speed? I've done this once before on another car. I'm aware of wiring and other things that will take time to solve and involve taking apart a lot of the car interior.

Generally speaking if I get a used or rebuilt 3-speed that's in good condition what type of mileage could I expect out of it?

I know the five speeds are pretty bulletproof.
 
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#6 ·
More than likely this is the real problem, as it's so hard to check the fluid level, or add fluid to it, as it's a separate unit. That's why the fluid level never changed in the trans (which is probably still good). It's the weak link in the early AT, and have been know to break when low or dry on fluid.
 
#3 ·
The belt is fine looking. And yeah, I suspect the front diff fluid went dry based on what I said. The transmission is not salvageable, it won't go into reverse. That tells me that some part of the transaxle is bad.

I think I'm gonna attempt a 240l swap if I can find a good candidate transmission in VA.
 
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#5 ·
Thanks for that. I'll find one on there. I can't promise it'll be immediate, but I'll try to document the process with all p/NS and hacks I'll be using.
 
#9 ·
Yep, the differential is separate from the transmission on the 3-speed A131L. The fill hole is on the back facing the firewall and hard to get to. You fill it until it's at the level of the hole. There is a separate drain hole on the bottom. The differential takes the same Dexron ATF as the transmission.

If it's the differential that went out you're not the first to have it happen to. Whether it's the transmission or the differential in either case you got to pull the transmission, and probably easier to pull the engine and transmission together. Be sure to replace the engine rear seal while you have it out.
 
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#10 ·
Yes, so here's my approach at the moment:

Find an A240L. Depending on miles, I may pay for it to be rebuilt. When I go to do this, I'm gonna pull the motor with the transmission. Among the things I'll do in combo with the trans swap are:

Timing belt/water pump
Seals, especially RMS, cam/crank seals, oil pan gasket
Valve adjustment/seals
painting
I may take the heads and do the valves IF I notice any other issues.
 
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#12 ·
I found some references mentioning that one engine mount needs to be replaced or something, I'll confirm hopefully.
 
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