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03-04-2014, 08:19 AM
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#1 |
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Registered User
Join Date: May 2013
Location: Albuquerque, NM
Posts: 1,106
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3.07 posi rear end with:
How would this rear end match up with a th350 and 350 motor in a 72 4x4 blazer?
Other option is with a 69 292 power glide set up? It would be nice to have that extra tire spinning on some of the hunting trips I go on. Thanks. |
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03-04-2014, 11:41 AM
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#2 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 3.07 posi rear end with:
What gear do you have in the front axle? And what diameter tires?
__________________
My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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03-04-2014, 01:20 PM
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#3 |
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Wide n'Low
 
Join Date: Jan 2007
Location: La Center, WA
Posts: 1,511
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Re: 3.07 posi rear end with:
It's my experience, many of the 350/350 setups I have come across in Blazers had 3.07/3.08 standard.
I have seen a few 3.73 combo's too, but as mentioned you need to match the front & rear.
__________________
Trippin Hazard.. 67 swb, Gold Member.. 68 Suburban Air Force Retired |
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03-04-2014, 01:44 PM
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#4 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,727
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Re: 3.07 posi rear end with:
Base model diff ratio in a 350 powered 4x4 '71-'72 would have been 3.07 gears while the optional gear was 3.73. I own (2) '72 Jimmys about 1200 serial #'s apart. Mine I learned to drive in is a 4 speed and came with 3.07. The other one that will eventually be my 10 year olds "project" is 3.73 and an auto.
What size tire do you have is a great question. IMO, 3.07 just isn't enough gear for 33" tires. 3.73 is ideal for that and 4.10 for 35's.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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03-04-2014, 02:31 PM
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#5 |
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Wide n'Low
Join Date: Jan 2007
Location: La Center, WA
Posts: 1,511
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Re: 3.07 posi rear end with:
Agree on the size of the tires,
I have a 75 Blazer with a 4 spd/205 so, (same 1:1 final ratio) and 3.07 gears, running 33's. Sucks around town and on even seemingly minor hills, but great running down the freeway..
__________________
Trippin Hazard.. 67 swb, Gold Member.. 68 Suburban Air Force Retired Last edited by Twisted78SS; 03-04-2014 at 02:49 PM. |
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03-04-2014, 03:29 PM
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#6 | |
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Registered User
Join Date: May 2013
Location: Albuquerque, NM
Posts: 1,106
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Re: 3.07 posi rear end with:
Quote:
Like I say other option if not doable for blazer is on my 69 with a 292 with power glide and stock tires. |
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03-04-2014, 07:25 PM
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#7 |
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Registered User
Join Date: Dec 2010
Location: livingston co.mi
Posts: 2,471
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Re: 3.07 posi rear end with:
3.07 is not too bad as long as your tires are no bigger than 31" with stock trans
just put the t/c in low range when you have to get with it
__________________
California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project |
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