help on a TH350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jcfoote60 · 03-31-2007, 12:16 AM

Guys, I have a chance to pickup a TH350 from a 76 4x4. is the only thing I need to do is to change the adapter from my 72 205?? No spline issues?? Thanks for your advice in advance, I'm not sure the span of years the 72 205 spline pattern was made beyond 1972.......

Jim

**special-K** · 03-31-2007, 06:10 AM

Are you converting to auto or relacing your TH350?

jcfoote60 · 03-31-2007, 09:46 AM

I'm replacing an existing one. 3rd gear is slipping badly and I can't afford to just have it rebuilt. I am seeing TH350's from 4x4's pretty regularly on Craigslist from 73 to 80 so was wondering if I just used my adapter would any of these years fit??

customcamper72 · 03-31-2007, 06:12 PM

it should be a bolt in if you already have a T-350.

sweet70beast · 04-01-2007, 08:17 PM

Th350 4x4s are a direct bolt in with each other except ones with lock up torque converters and those are easy to spot. 700r4s have the same 4 bolt output and spline count as a th350 but is 2 inches longer, if you ever decided to go that route it will bolt to a 205 t-case and its adapter.

Chris27 · 04-02-2007, 02:28 PM

Quote:

700r4s have the same 4 bolt output and spline count as a th350 but is 2 inches longer, if you ever decided to go that route it will bolt to a 205 t-case and its adapter.

The output shaft on the 700R4 has the same splines, but is too long. To do this swap you need a short output shaft from Advance Adapters. Stock Th350 T-case adapter is a direct bolt on.

03-31-2007, 12:16 AM	#1
jcfoote60 Active Member Join Date: Jun 2005 Location: Idaho Posts: 263	help on a TH350 Guys, I have a chance to pickup a TH350 from a 76 4x4. is the only thing I need to do is to change the adapter from my 72 205?? No spline issues?? Thanks for your advice in advance, I'm not sure the span of years the 72 205 spline pattern was made beyond 1972....... Jim

03-31-2007, 06:10 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: help on a TH350 Are you converting to auto or relacing your TH350? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

03-31-2007, 09:46 AM	#3
jcfoote60 Active Member Join Date: Jun 2005 Location: Idaho Posts: 263	Re: help on a TH350 I'm replacing an existing one. 3rd gear is slipping badly and I can't afford to just have it rebuilt. I am seeing TH350's from 4x4's pretty regularly on Craigslist from 73 to 80 so was wondering if I just used my adapter would any of these years fit??

03-31-2007, 06:12 PM	#4
customcamper72 Registered User Join Date: Jan 2007 Location: wisconsin Posts: 51	Re: help on a TH350 it should be a bolt in if you already have a T-350.

04-01-2007, 08:17 PM	#5
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: help on a TH350 Th350 4x4s are a direct bolt in with each other except ones with lock up torque converters and those are easy to spot. 700r4s have the same 4 bolt output and spline count as a th350 but is 2 inches longer, if you ever decided to go that route it will bolt to a 205 t-case and its adapter. Last edited by sweet70beast; 04-01-2007 at 08:18 PM.



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