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02-28-2011, 09:39 PM
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#1 |
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Registered User
Join Date: Jun 2010
Location: Lafayette , La
Posts: 404
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2x4 vs 4x4 rear ends
My boss has a posi with 3.08 gears off his stock 1980 GMC 1/2 ton 4x4.
I was looking to put it in my 1984 chevy silverado 4x2 with 3.08 open diff. do any of you know if the 4x4 ring and pinion are the same as the 2x4s?
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1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet |
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02-28-2011, 11:46 PM
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#2 |
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Registered User
Join Date: Aug 2008
Location: Siskiyou Co
Posts: 45
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Re: 2x4 vs 4x4 rear ends
Should be... I look at websites like Randy's Ring and Pinion when I need an answer to a rearend question. I found out that the axles will interchange from a 2x4 to a 4x4 axle. My local wrecking yard has lots of 4x4 parts, but not a lot of 2x4 stuff. I can get a 3.08 rearend for next to nothing to replace my 4.10 geared one. All I have to do is put my axle shafts in it.
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02-28-2011, 11:48 PM
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#3 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: 2x4 vs 4x4 rear ends
Yep its the same, go for it.
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03-01-2011, 11:02 AM
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#4 |
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Registered User
Join Date: Jun 2010
Location: Lafayette , La
Posts: 404
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Re: 2x4 vs 4x4 rear ends
cool thanks for the help guys. I figured it would all be the same
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1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet |
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03-01-2011, 06:38 PM
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#5 |
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Registered User
Join Date: Nov 2009
Location: Antigonish Nova Scotia
Posts: 213
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Re: 2x4 vs 4x4 rear ends
whats a good rear end ratio for a 2 wheel drive with a mild 350 lookin to get good highway speeds (top speed) and gas mileage?
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03-01-2011, 07:39 PM
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#6 |
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Registered User
Join Date: Nov 2010
Location: Windsor Locks
Posts: 628
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Re: 2x4 vs 4x4 rear ends
what trans will you be running and what size tires ?
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03-01-2011, 08:20 PM
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#7 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: 2x4 vs 4x4 rear ends
Trans makes a HUGE difference in rearend ratio, the 700R4 will like something like a 3.73 where as a TH350 will like more of a 3.08 or likes...
My truck is a big block with TH400 running stock size tires (31's) and the 3.73's seem perfect for off the line power with highway cruising gear. Best of all worlds for me. Be sure to install a locker if you are opening the rearend up! |
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03-01-2011, 09:34 PM
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#8 |
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Registered User
Join Date: Nov 2009
Location: Antigonish Nova Scotia
Posts: 213
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Re: 2x4 vs 4x4 rear ends
TH350, im pretty sure thats what it is, came off a 84 305 2wd
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03-01-2011, 10:42 PM
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#9 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: 2x4 vs 4x4 rear ends
Still need to know tire size.
If you have a low end cam and stockish converter then the 3.08's will get good mileage and decent power, I personally would still go 3.73's and posi. |
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