700R4 Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71GMC 4x4 · 01-07-2003, 04:33 PM

I have a 71 GMC 4x4 with a th350. How hard would it be to put in a 700R4? I have a 205 trans. case

79Silv4x4 · 01-07-2003, 05:24 PM

**breeh** · 01-07-2003, 07:53 PM

It is a fairly simple exchange. I did it in my stepside. You just need to make sure that you put in a shortened trans shaft which is available from Advance Adapters. It will then bolt right up to your TH350/205 adapter.

71GMC 4x4 · 01-07-2003, 08:59 PM

What about the crossmember, did you have to move it?

**breeh** · 01-07-2003, 10:20 PM

Yes, I did have to move the crossmember. I did a few changes at once so I knew that I would have to move it. I put in a BBC and moved the engine crossmember forward to move the distributor away from the firewall. I also changed from a rockwell TC to a 205. It is easy to move and redrill the TC crossmember. The hardest part is figuring out where to drill the holes for the TC stabilizing mount on the passenger side.

01-07-2003, 04:33 PM	#1
71GMC 4x4 Registered User Join Date: Mar 2002 Location: Redway,Ca. U.S.A Posts: 37	700R4 Question I have a 71 GMC 4x4 with a th350. How hard would it be to put in a 700R4? I have a 205 trans. case __________________ [IMG]http://mustangmods.com/publish/topless99/truck2.jpg[IMG] Last edited by 71GMC 4x4; 01-07-2003 at 04:40 PM.

01-07-2003, 05:24 PM	#2
79Silv4x4 Workaholic Join Date: Oct 2002 Location: Katy, TX Posts: 1,589	Ask the guys at http://www.700r4.com __________________ 1979 K-10 Silverado (work in progress) 1991 V1500 Subruban 1999 Suburban LT 4x4 2006 Suburban LTZ (daily driver)

01-07-2003, 07:53 PM	#3
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	It is a fairly simple exchange. I did it in my stepside. You just need to make sure that you put in a shortened trans shaft which is available from Advance Adapters. It will then bolt right up to your TH350/205 adapter. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

01-07-2003, 08:59 PM	#4
71GMC 4x4 Registered User Join Date: Mar 2002 Location: Redway,Ca. U.S.A Posts: 37	What about the crossmember, did you have to move it? __________________ [IMG]http://mustangmods.com/publish/topless99/truck2.jpg[IMG]

01-07-2003, 10:20 PM	#5
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Yes, I did have to move the crossmember. I did a few changes at once so I knew that I would have to move it. I put in a BBC and moved the engine crossmember forward to move the distributor away from the firewall. I also changed from a rockwell TC to a 205. It is easy to move and redrill the TC crossmember. The hardest part is figuring out where to drill the holes for the TC stabilizing mount on the passenger side. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.