ID for trans.

[Ken B]

What is a quick easy way to ID my tranny? i am looking to switch from a straight 6 to a 350 and wanna make sure of compatability......any advice?
Thanks

 

[Bextreme04]

oil pan shape will do it 99% of the time. https://news.classicindustries.com/diagrams/transmission-identification-gm/

 

[Ricko1966]

Do you have an automatic? Do you have a manual? How many gears does it have?What year is the truck?

 

[Salty Crusty]

Does it look more like Bruce or Caitlyn?

 

[Ken B]

sorry that wouldve been good info to include. 81 c10 250 6cy. Auto trans

 

[Ken B]

great link to classic industries! thanks TH350 it appears. I dont think there will be any issues bolting up a 350....

 

[TX87R10]

Does it look more like Bruce or Caitlyn?

You can use a nut-tap to figure out if it is pre or post surgery as well if you are feeling frisky.

 

[Ricko1966]

It will bolt up, your kinda in a tricky spot though typically 6 cyl installations used less fibers and steels in the clutch packs and a looser converter. Trucks were a grey area,maybe a low power transmission, maybe not. But physically bolt up and work, yep.

 

[Ken B]

I had it rebuilt years ago,,,,,but paperwork is probably long gone, Do all TH350 have trans cooling lines?

 

[Ricko1966]

Yes.Does this transmission have a vacuum modulator? Where is it located?How many bolt holes in the pan?

 

[Ken B]

13 bolts on pan

 

[Ricko1966]

Should be th350. Why are you asking about cooler lines?

 

[Ken B]

i read something in Hemmings that I thought said some TH350 did not have cooling lines....

 

[Ricko1966]

You were confusing me.I was trying to figure out what you had that you thought was a th350 with no coolant lines, that's why I kept asking questions. Sorry.

 

[Ken B]

All good thanks.....I appreciate any input. First time build here....TONS of questions. Just asking them one at a time.