Thread: Transmission ID Help Please

Tweet

Hi folks. I have a GM TH 700R4 transmission that I'd like help in indentifying.
The tag on the bellhousing portion reads '08667627'.
The number engraved into the case just above the pan is '619T, (can't read the next character), then an M, (then either a Y or an X), (then either an O or a Q), then 2926271'.
Like it could be 619T_MYO2926271? It was taken from an '89 Chevy S-10 pickup truck which had a 4.3 L. engine.
I'd like to couple this to a stock GM 283 c.i. engine. Can I use the same flexplate and convertor that was in the 4.3 installation?
Thanks ever so much for the info (in advance). perley

In it's stock form I would say no. The 700R4 that was used behind the V6 is a light duty version. It may work for a short time but the extra torque of the V8 will shorten it's life. Yes it will bolt up useing all stock pieces. I put a 700R4 (1988 V8 Camaro version) behind a 1969 307.

I wouldn't worry about it being from a V6.
I believe it may only have one less friction and steel plate in the 3-4 clutch pack.
The 283 probably doesn't have a whole lot more torque than the 4.3.
The same torque converter is OK, but I don't know if the 283 has a smaller flexplate and different starter than the 4.3.
If so , use the 283 flexplate.

Your tranny is a 1986 unit BTW.

That sounds great to me 123P. I'll have to wait until the engine shows up here to see what is on the back of the thing. And thanks for identifying the year too! Now another question. The torque convertor has a tag with the number 8653702. Can someone help by identifying this, stall etc. Thanks. perley

Googling comes up with about 1650 stall.
4.3 liter from a van or something.

Thanks very kindly 123P. Do you think that this unit will be OK for the 283? perley

Yes, it will be fine strength wise if that's what you're getting at.
I hope its in a light car as I had one behind a 283 in my full size pickup and it was a dog.
I had to keep my foot into the throttle to keep it going and was getting 10 MPG.

I now have it behind a 350 TPI with 292 rear wheel ft/lbs of torque and I can't bust it up no matter how hard I try.
Its getting 17 MPG as well in the same truck.

The later (88 and up) units have all the factory upgrades but with a 283 the 86 unit should be fine.
If something happens to it, toss it and pick up an 88 and up unit for rebuild.

Thank you again 123P. The number I got from the transmission is 9THM024C. From the info I found on the internet I presumed that it was a 1989 unit.
Now, from what you just wrote, was the poor performance due to the transmission OR because of the 1650 converter? OR was it due to the 283 engine? perley

Sorry, your original post had the first digit as a 6. That would make it an 86 unit.

89 is a good one.

Problem with mine was too much load to push with a low torque motor.
You didn't mention what you're putting it into.