Tranny question

Blackheart4355 · Poncho Master!

Tranny question

427carl · A Poncho Legend!

Camaro site

Type	Plant	Code
3-Speed	Muncie L.D.	S
4-Speed (cast iron case)	Muncie L.D.	R
4-Speed (Aluminum case)	Muncie H.D.	P
Powerglide	Cleveland	C
Powerglide	McKinnon	E
Turbo Hydramatic 350	Cleveland	B
Turbo Hydramatic 350	Toledo	Y
Turbo Hydramatic 350	GM Canada	J

Blackheart4355 · Poncho Master!

Thanks Carl,

But none of these seem to really fit...simply because the Z is very pronounced, and the J is on its back and backwards.

Stephenzone · Canadian Poncho Superstar!

any pics of the tranny

the70judge · Guru

Blackheart4355 wrote:
OK,
So as I noted in another post we've got the engine and tranny separated and serviced the tranny before we attach it to the 327. But I noticed that it looks like this is not a GM built TH350 as there is no GM markings on the case at all. In fact, the only markings are on the top of the bellhousing cover. The mark is a large Z with a J on its back underneath it.
Does anyone have an idea what this mark is?

Do you have any close up shots of it?

Blackheart4355 · Poncho Master!

No,

But I can get it..just can't seem to get any of the ones I have now of the engine swap to upload

Blackheart4355 · Poncho Master!

Well there was a stamping new the tail that looked like a date..

15 9 11

Plus there were more numbers on the side but I didn't write them down..if I go out to the shop tomorrow then I'll write them down...

Oh and it has 13 bolts on the pan

-- Edited by Blackheart4355 on Saturday 12th of May 2012 09:53:16 PM

Blackheart4355 · Poncho Master!

OK,

I got a picture of the mark on the trans I was wondering about..

the70judge · Guru

Blackheart4355 wrote:
OK,
I got a picture of the mark on the trans I was wondering about..

Weird for sure... The line through the Z is to make sure someone does not think its a two.. Thats an old military way of doing the Z and the 2. and the line under it is making sure its not read as a N I guess.. What were the numbers on it and do you have a picture of it all and maybe the pump on it

the70judge · Guru

Maybe its a ST300

1
View the transmission. The GM ST-300 automatic has a one-piece aluminum case and bell housing. The cast aluminum casing has a smooth texture, unlike the rough surface of a cast-iron transmission housings.
2
Count the bolts attaching the oil pan to the bottom of the ST-300. The oil pan, located at the bottom of the transmission, has 14 bolts holding it to the transmission case.
3
Notice the shape of the ST-300 transmission oil pan. the pan has a square shape, with the driver's-side rear corner on an angle and an extension at the passenger's-side rear corner