72/68 trans x-member question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ncgamedog · 05-31-2011, 04:26 PM

I am looking for a trans x-member for my project and need to be sure I'm looking for the right thing. I'm using a 68 body and th400 mated to a np205 which is going onto a 72 frame . Can I use my factory 68 2wd x-member? Or will a 4wd x-member from a 72 blazer be the right thing to use? I found a 4wd x-member from a 72 blazer, but it had a th350. Will this still work since I'm using the 400?? Thanks for any help!
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ncgamedog · 06-01-2011, 07:10 AM

Surely someone knows the answer to this on here...

Maybe I should clarify:

Will a transmission crossmember from a 72 blazer equipped with a th350/205 work in a 72 PU equipped with a TH400/205 without major modification?

Chevy1TonFun · 06-01-2011, 08:37 PM

You need to use a 4wd crossmember. The one out of the blazer should be the same as the one out of the p/u. The only difference between to two frames are the wheelbase.

**jamie72** · 06-01-2011, 09:55 PM

use the 4x4,but just remember these trucks didn`t come from factory with a th400(in a 4x4),so you still might need to modify a little.. good luck..

ncgamedog · 06-01-2011, 11:28 PM

ok thanks guys!

That is really strange to me too. Why would GM not offer the th400 in a 4x4? And whats even stranger to me is why they would offer it in a 68 2wd 1/2 ton with a 327ci. I could understand it in a 3/4 ton (c/k 20) or behind a bigger engine.

The 68 2wd has the 327 and th400. The trans is in great shape so I figured why not try to use it.

05-31-2011, 04:26 PM	#1
ncgamedog Registered User Join Date: Jul 2007 Location: Union Grove,NC Posts: 58	72/68 trans x-member question I am looking for a trans x-member for my project and need to be sure I'm looking for the right thing. I'm using a 68 body and th400 mated to a np205 which is going onto a 72 frame . Can I use my factory 68 2wd x-member? Or will a 4wd x-member from a 72 blazer be the right thing to use? I found a 4wd x-member from a 72 blazer, but it had a th350. Will this still work since I'm using the 400?? Thanks for any help! Posted via Mobile Device

06-01-2011, 07:10 AM	#2
ncgamedog Registered User Join Date: Jul 2007 Location: Union Grove,NC Posts: 58	Re: 72/68 trans x-member question Surely someone knows the answer to this on here... Maybe I should clarify: Will a transmission crossmember from a 72 blazer equipped with a th350/205 work in a 72 PU equipped with a TH400/205 without major modification?

06-01-2011, 08:37 PM	#3
Chevy1TonFun Grease Monkey Join Date: Oct 2007 Location: Fresno CA Posts: 750	Re: 72/68 trans x-member question You need to use a 4wd crossmember. The one out of the blazer should be the same as the one out of the p/u. The only difference between to two frames are the wheelbase. __________________ Tow Rig: 2012 Chevy 2500HD CCSB LTZ Z71 4x4 Duramax Ultimate Offroad Build: 1978 Chevy Silverado K30 Crewcab Build Link http://67-72chevytrucks.com/vboard/s...d.php?t=654053 Mud Truck: 1972 Chevy Cheyenne K30 4x4, 468/400/205, D60/D70HD, 18" Custom Lift, 17x39" IROKs FOR SALE http://67-72chevytrucks.com/vboard/c...ton-4x4&cat=12

06-01-2011, 09:55 PM	#4
jamie72 Senior Member Join Date: Apr 2000 Location: madison indiana Posts: 3,836	Re: 72/68 trans x-member question use the 4x4,but just remember these trucks didn`t come from factory with a th400(in a 4x4),so you still might need to modify a little.. good luck.. __________________ jamie72 72 BB cheyenne -- Restoration getting started.. member #807 http://www.myspace.com/whitetailobsession www.antlertalk.com

06-01-2011, 11:28 PM	#5
ncgamedog Registered User Join Date: Jul 2007 Location: Union Grove,NC Posts: 58	Re: 72/68 trans x-member question ok thanks guys! That is really strange to me too. Why would GM not offer the th400 in a 4x4? And whats even stranger to me is why they would offer it in a 68 2wd 1/2 ton with a 327ci. I could understand it in a 3/4 ton (c/k 20) or behind a bigger engine. The 68 2wd has the 327 and th400. The trans is in great shape so I figured why not try to use it.



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