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07-18-2011, 08:03 PM | #1 |
18 Till I Die
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1987 Diff same as 1988??
Pretty sure I Know the answew but I thought Id check anyway. 1987 was the last of the squares as everyone knows. Is the diff the same or close as a 1988. I can get an 1988 rear diff for 100 bucks so the price is right but not if it dont work. I need a 3:42 Posi cause mine is Hoop'd.
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... |
07-18-2011, 08:35 PM | #2 |
No No
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Location: Pueblo Colorado
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Re: 1987 Diff same as 1988??
88 is slightly longer about an inch on either side.depending on your wheel backspacing may not effect clearances usually doesent. the only thing I dont recall off hand is if you would need a different u joint. for the price might be a good option unless the new diff is a grenade lock.
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1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler |
07-18-2011, 11:55 PM | #3 |
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Re: 1987 Diff same as 1988??
You may be able to swp tha whole axle, but tha posi unit won't swap...if that's what you mean...28 spline vs 30 spline..
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07-18-2011, 11:58 PM | #4 |
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Re: 1987 Diff same as 1988??
Is it from a new body style truck, or an '88 Burb? The new body style axle would need the spring perches and shock mounts cut off and welded back on in the correct spot.
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07-19-2011, 07:06 AM | #5 | |
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Re: 1987 Diff same as 1988??
Quote:
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07-19-2011, 10:42 AM | #6 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
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Re: 1987 Diff same as 1988??
Yea thought so..My 3:42 gov has seen better days and I would like to swap in a whole diff rather than tear it apart. If i cant find another what would be the way to go to get a 3:42 posi in a 10 bolt without going back to the Gov-bomb? Mayby I should look for a 3:42 Non Posi?
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... |
07-19-2011, 11:55 PM | #7 | |
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Re: 1987 Diff same as 1988??
Quote:
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Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
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07-22-2011, 12:34 PM | #8 |
18 Till I Die
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Re: 1987 Diff same as 1988??
Yes all original..Are 3:42 non posi common to find?
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... |
08-11-2011, 10:46 AM | #9 |
18 Till I Die
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Re: 1987 Diff same as 1988??
does anyone know?
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... |
08-11-2011, 11:46 PM | #10 |
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Re: 1987 Diff same as 1988??
3.42 is quite common in the 88-up.
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Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
08-12-2011, 07:10 AM | #11 | |
78K & 79C Jimmys
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Re: 1987 Diff same as 1988??
Quote:
duno bout the 87
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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