I bought a 1991 Toyota Pickup V6 Automatic 155k miles around the end of spring this year and am having some problems with it.

Since I got it, it has never had much power. Going up hill you need to have the accelerator pressed to the floor to MAINTAIN speed. It's also never got good MPG. Best i've ever gotten was 15 MPG and that was mostly cruising speed with the A/C off.

One day we hopped in the truck and got out on the interstate. We were going 70-75 for 30 miles when all of a sudden the truck starts slowing down. I give it come gas and just here something whurring. Coast to the exit we were coming up on and get to a gas station. At this point the truck was barely moving on its own power. Park, look under the truck, see hot, foamy transmission fluid running out of the bell housing.

So, what do you guys think happened? Blew the main seal in my transmission? Torque converter detonated?

Thanks,
Clark.

 

Transmission probably overheated.

Torque converter could have been damaged.

 

My AT temp light never came on and what causes it to overheat? It's a stock truck and i wasn't hauling or towing anything. How do you inspect a torque converter for damage?

 

Don't think there's any way to visually check a torque converter.
Think the way to start would be to fill the tranny with the proper fluid and check tranny line pressure and converter stall speed.
Obviously, if the tranny fluid is coming out as fast as you can pour it in, disassembly is probably your only option.

 

KtrainHurricane had similar tranny/power problems (also search his other threads): https://www.yotatech.com/forums/f116...eating-272750/