72 chevy C-20 rear end - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gjimenez · 03-21-2008, 06:58 AM

I have a 72 C-20 with the DANA 60 rear end, I am thinking to change it to a chev 14 bolt. has any body done it?

**oldiron** · 03-21-2008, 08:48 AM

Moving this over to the pickup forum for you.

71big block · 03-21-2008, 09:17 AM

I did it on my 71 GMC, the only issue I had was getting the proportioning set correctly. I removed the factory valve and replaced it with an adjustable one.

Longhorn Man · 03-21-2008, 01:42 PM

then there is the shock mount that needs reloacated, and the mount foe the pan hard bar, then there are speedo gears needing swapped out.

Why do you want to swap to the later axle?

71big block · 03-22-2008, 12:47 AM

mine was a leaf spring rear,

gjimenez · 03-22-2008, 05:12 AM

I tow a trailer and was advised that the 14 bolt is a stronger axle, my truck is also a leaf spring, what about the spring perches do they have to be relocated?

71big block · 03-22-2008, 05:21 AM

yea, they had to be moved a little on the one I installed, it came out of a 88 burb, it was no big deal to relocate them.

ed2552 · 03-22-2008, 05:58 AM

is it a custom built or GM crate 572 in ur truck? won't a Dana 60 Hold up fine? or did you blow it up right away?

Longhorn Man · 03-22-2008, 06:56 AM

Unless you are getting crazy with power, hammering the throttle, or overloading the truck, the dana will probably be just fine.

71big block · 03-22-2008, 10:05 AM

My daughter blew up my dana 60 when I had the 454 in the truck, I put the 14 bolt in because I had it laying around. My 572 is costom built

03-21-2008, 06:58 AM	#1
gjimenez Registered User Join Date: Mar 2008 Location: San Diego, California Posts: 3	72 chevy C-20 rear end I have a 72 C-20 with the DANA 60 rear end, I am thinking to change it to a chev 14 bolt. has any body done it?

03-21-2008, 08:48 AM	#2
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,092	Re: 72 chevy C-20 rear end Moving this over to the pickup forum for you. __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

03-21-2008, 09:17 AM	#3
71big block 1971 GMC 3/4 ton, 572 CID Join Date: Aug 2007 Location: Green Bay, WI Posts: 293	Re: 72 chevy C-20 rear end I did it on my 71 GMC, the only issue I had was getting the proportioning set correctly. I removed the factory valve and replaced it with an adjustable one. __________________ 71 GMC 3/4 572 CID, 1988 GMC 1/2 2006 Saturn Vue "We always have parts left over on a job this size"

03-21-2008, 01:42 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 72 chevy C-20 rear end then there is the shock mount that needs reloacated, and the mount foe the pan hard bar, then there are speedo gears needing swapped out. Why do you want to swap to the later axle?

03-22-2008, 12:47 AM	#5
71big block 1971 GMC 3/4 ton, 572 CID Join Date: Aug 2007 Location: Green Bay, WI Posts: 293	Re: 72 chevy C-20 rear end mine was a leaf spring rear, __________________ 71 GMC 3/4 572 CID, 1988 GMC 1/2 2006 Saturn Vue "We always have parts left over on a job this size"

03-22-2008, 05:12 AM	#6
gjimenez Registered User Join Date: Mar 2008 Location: San Diego, California Posts: 3	Re: 72 chevy C-20 rear end I tow a trailer and was advised that the 14 bolt is a stronger axle, my truck is also a leaf spring, what about the spring perches do they have to be relocated?

03-22-2008, 05:21 AM	#7
71big block 1971 GMC 3/4 ton, 572 CID Join Date: Aug 2007 Location: Green Bay, WI Posts: 293	Re: 72 chevy C-20 rear end yea, they had to be moved a little on the one I installed, it came out of a 88 burb, it was no big deal to relocate them. __________________ 71 GMC 3/4 572 CID, 1988 GMC 1/2 2006 Saturn Vue "We always have parts left over on a job this size"

03-22-2008, 05:58 AM	#8
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: 72 chevy C-20 rear end is it a custom built or GM crate 572 in ur truck? won't a Dana 60 Hold up fine? or did you blow it up right away? __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

03-22-2008, 06:56 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 72 chevy C-20 rear end Unless you are getting crazy with power, hammering the throttle, or overloading the truck, the dana will probably be just fine.

03-22-2008, 10:05 AM	#10
71big block 1971 GMC 3/4 ton, 572 CID Join Date: Aug 2007 Location: Green Bay, WI Posts: 293	Re: 72 chevy C-20 rear end My daughter blew up my dana 60 when I had the 454 in the truck, I put the 14 bolt in because I had it laying around. My 572 is costom built __________________ 71 GMC 3/4 572 CID, 1988 GMC 1/2 2006 Saturn Vue "We always have parts left over on a job this size"



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