[hduff]

I have a TH350 transmission, but am having difficulty further identifying it.

On the passenger side of the pan is Y8P 09N, which I believe indicates that it was manufactured in Toledo during the night shift, September 09, 1978.

On the passenger side case, just ahead of the oil pan, is 8A108563 with the additional number 563 stamped at a slight angle after the longer number. This is supposed to be the VIN, but it's missing the first 5 digits (which would be helpful).

"T5" is cast into the case on both sides. The accumulator cover has the number 25 on it.

I can find no other numbers or letters on the transmission.

Any ideas?

[SSedan64]

Anything on the Governor cover?
Info here, bottom right of Pg.>> http://th350.netfirms.com/pages/7a2-70.jpg and here>> http://th350.netfirms.com/pages/7a2-71.jpg
More Info>> http://www.nastyz28.com/chevy-transm...tification.php

[hduff]

Not a thing on the governor cover. I cleaned a lot of gunk off the transmission and polished all the flat surfaces with a Scotch-brite pad to find what I found.

The "VIN" number seems odd. Cpould this have been a reman or Goodwrench TH350?

[SSedan64]

It's possible, I don't know how or if you can ID a Reman Trans. Dealer "may" know.

[hduff]

After cleaning up the transmission, I did find the additional number 0117137 on the driver's side case on the body above the pan flange.
It

It uses the long tailshaft, does nopt use a kickdown cable, but instead has a vacumn atachment at the rear of the case.

Anyway, it cleaned up nicely. I'll change the filter before it goes back in the car.

Thanks for all your help.

[cobalt327]

On a TH350 trans, there should be a (possibly plugged) hole near the dip stick tube (passenger side) where the KD cable would have attached. There should also be a ~1/4" threaded bolt hole close to the hole or plug that is used to attach the cable.

[joe_padavano]

Originally Posted by hduff

On the passenger side case, just ahead of the oil pan, is 8A108563 with the additional number 563 stamped at a slight angle after the longer number. This is supposed to be the VIN, but it's missing the first 5 digits (which would be helpful).

The engine and transmission did not get a full VIN stamp, they received a nine character VIN derivative. I suspect your number above has a "1" in front of it, making it 18A108563. If so, it would decode like this:

1 = Chevrolet division
8 = 1978 model year
A = Lakewood, GA assembly plant
108563 = last six digits of the VIN for the car it was installed in

[hduff]

Originally Posted by cobalt327

On a TH350 trans, there should be a (possibly plugged) hole near the dip stick tube (passenger side) where the KD cable would have attached. There should also be a ~1/4" threaded bolt hole close to the hole or plug that is used to attach the cable.

It seemed to operate fine before with just the vacumn hose attached. There is a plug of sorts where the KD cable would attach. Benefits of KD vs. vacumn?

[hduff]

Originally Posted by joe_padavano

The engine and transmission did not get a full VIN stamp, they received a nine character VIN derivative.

Thanks. The frame is a mid-70's B-body: I was told Impala wagon, IIRC, the hubs are 5x5. The motor is a Goodwrench crate 350, 4-bolt main and I suspect the TH350 is a reman (and oddly, it was painted gold).


I'm just trying to document all this stuff to make any future repairs easier.

[Crosley]

I am not sure I understand the concern over what year t-350 it is.

If the trans needs a rebuild , the kits are all the same for a t-350 non lock up trans.

If you take the trans to a shop for rebuild and they need to know the year of the trans before they work on it, find another shop.

[hduff]

Originally Posted by Crosley

I am not sure I understand the concern over what year t-350 it is.

If the trans needs a rebuild , the kits are all the same for a t-350 non lock up trans.

If you take the trans to a shop for rebuild and they need to know the year of the trans before they work on it, find another shop.

Agreed, but I'm just curious.