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#1 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Rear End Question
I have an opportunity to buy a wrecked 2003 Chev pickup. It has the 4.8 and the rear end is a 3:42 with the G80 Limited Slip option. This is exactly the setup I want for my 72 and I'm wondering if it would be big deal to swap the rear end into my 72 knowing I'd have to get the saddles for the trailing arms welded on. I didn't look to see if it is a 10 or 12 bolt.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#2 |
Registered User
Join Date: Dec 2007
Location: Mountain Home, AR
Posts: 405
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Re: Rear End Question
Shouldnt be an issue. Just be sure the axle width is within tolerances so as to not increase/decrease your track width in the rear too much and cause rubbing if you plan on running the same wheels. You may need to get new axle shafts though, as if Im not mistaken that axle is 6 lug instead of 5. Also make sure that the driveshaft will bolt up to that yoke.
If there is no issue with any of this, just cut off the old mounts with a torch, grind the axle tubes smooth, bolt it up and set your pinion angle and tack on the saddles. Be sure your axle is centered under the frame. DOUBLE CHECK YOUR PINION ANGLES BEFORE FULLY WELDING IT UP. If everything is all good, weld up the saddles, and change the differental fluid in the rear end as the heat from the welding and grinding can cause it to break down. Swapping different axles into these trucks or any other vehicle has been done for decades. Should not be a hard swap, and could be done on a Saturday afternoon. |
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#3 |
Sisyphus was my mentor!
![]() Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: Rear End Question
I _think_ G80 equals a Gov Lock. Googling G80 will save you a Gov lock headache.
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passthebuck ![]() #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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#4 |
Registered User
Join Date: Jan 2010
Location: Regina, Saskatchewan
Posts: 10
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Re: Rear End Question
It's definitely not a 12bolt its been a long long time since those have ever been used, I think you will find it's an 8.6" 10bolt, similar housing to the older 8.5"diffs, with a locker(not limited slip). It will be about 4+ inches wider than your existing diff and will be 6 bolt wheels not 5 as already stated. Have you looked at it yet as I am thinking an 03 would be disc brakes also, that could add even more complications. And almost guaranteed to be some u-joint/driveshaft modification as well.
Its doable, its actually pretty much what I am going to do with my current project, but it's far from a bolt in deal.
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67 Chevy C10 67 Chevy Camaro 95 Chevy Camaro Z28 10 GMC Sierra Last edited by Cid636; 06-09-2011 at 09:34 PM. |
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#5 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: Rear End Question
Don't forget the panhard bar bracket or mount needs to be added on.
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#6 | |
70+ ( Old Skool Club )
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Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Re: Rear End Question
Quote:
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#7 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Rear End Question
go to local shop and check price to rebuild your present rear with posi and ratio of your choice
should b less than half of what a new rear will cost plus there wont b shipping and import fees pretty sure from currie you'll still need to weld on the saddles and panhard brackt your self
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#8 | |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Re: Rear End Question
Quote:
__________________
1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#9 | ||
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear End Question
Quote:
That "lock" word in the discription of the G-80 (Gov-Lock) is a huge mis-nomer. They are not a locking differential. It is a simple "clutch-type" posi unit that has a centrifugal "governor" that applies more pressure to the clutches...rather than the springs of the standard type posi.
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#10 |
My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: Rear End Question
AKA.....time bomb
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#11 | |
Registered User
Join Date: Jan 2010
Location: Regina, Saskatchewan
Posts: 10
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Re: Rear End Question
Quote:
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67 Chevy C10 67 Chevy Camaro 95 Chevy Camaro Z28 10 GMC Sierra Last edited by Cid636; 06-10-2011 at 08:01 PM. |
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