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Old 11-15-2008, 05:39 AM   #1
combustion
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eaton limited slip

well i have been having many questions but no one gives me a straight answer. ever since my bbc went my in truck, its hard to gt traction. i have a 12 bolt rear from a 71 c10 that cam with a th350 and a 307. i saw some summit racing limited slips posis but im not sure what one to use. they keep saying "for passenger cars" is that not the one i need. i type in the model of truck and nothing comes up. are all 12bolts the same? i also need 4.11 gears. can someone give me a link? i have roughly about 700 buckaroos to spend, thanks.
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Originally Posted by special-K View Post
If it`s 3.73 ratio you will spint the wheel 100 times to the driveshaft`s 373 times.Or,if you`re lazy,you could just spin the wheel once and the driveshaft will spin 3.73 times.Or, 3 and 3/4 turns.And if you`re real lazy,I can sell you a tab for whatever ratio you want.
Or,you could read all the suggestions and try those.It`s been well explained,I think,already.
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Old 11-15-2008, 07:09 AM   #2
cdowns
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Re: eaton limited slip

12bolt truck is different from 12bolt car//try googeling randys ring and pinion or speedway motors might have a better list// or wait till monday and call summit and talk to a live guy
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Last edited by cdowns; 11-15-2008 at 07:10 AM.
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Old 11-15-2008, 08:35 AM   #3
special-K
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Re: eaton limited slip

Big blocks came with 3.08s because of the higher torque.The lower the gearing the higher tendency to break rear wheels loose.
I like Randy`s and another great company is Reider Racing.They`ve beam around forever,very knowledgeable,and helpful.They are gear specialists.www.reiderracing.com

The only differences within the truck 12-bolts is in the carriers themselves,depending on gearing.The break-off is 3.73 lower and higher.
For the street,I like the factory (Eaton),but really like the Auburn the most.
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Last edited by special-K; 11-15-2008 at 08:42 AM.
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Old 11-15-2008, 08:49 AM   #4
71 super
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Re: eaton limited slip

if you contact summit, they have auburn truck posi. units for sale. try looking in 4x4 section instead of race/ car section last one I bought was from them and it worked great.
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