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  #1  
Old 04-01-2016, 07:33 PM
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PrimeredPontiac PrimeredPontiac is offline
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Default 12 bolt posi and MW C-clip elim and axles

For sale used "tuned" Eaton 12 bolt 3 series posi 30 spline from Tom's Differentials with heat treated spider gears ( pn C12 1017)
$275+ shipping

Used 30 spline Mark Williams Master Line axles for 12 bolt 54.250 housing width, and C -clip eliminator kit.
Axles are drilled for 1/2" threaded studs with 3 bolt patterns. 5 on 4.5" ,5 on 4.75" and 5 on 5"
$150+ shipping

Ran these in my 70 grand prix. I swapped to 35 spline axles and a spool before I put a Trans brake in it.
The splines on one axle look like they started to twist slightly (see picture). After I noticed this, I checked them a couple times a year for 3 years and it didn't twist anymore, even though the car got faster. Eventually ran some high 9s at 4150lbs with 1.39 60 foots with these parts.
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  #2  
Old 04-01-2016, 07:41 PM
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PrimeredPontiac PrimeredPontiac is offline
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More pics.
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  #3  
Old 04-01-2016, 11:05 PM
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pontiacs-r-us pontiacs-r-us is offline
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Is 3 series for 3:08-3:73 gear ratio's?


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  #4  
Old 04-02-2016, 07:46 AM
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PrimeredPontiac PrimeredPontiac is offline
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Yes, 3.08 to 3.73
Richmond also makes a 4.10 that fits the 3 series carrier.

  #5  
Old 04-02-2016, 11:12 AM
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68greenbird 68greenbird is offline
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PM sent

  #6  
Old 04-02-2016, 07:24 PM
judgethis judgethis is offline
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Default 12 bolt

Sent a PM and put me in line if there is one.

  #7  
Old 04-02-2016, 08:39 PM
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PrimeredPontiac PrimeredPontiac is offline
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PMs replied.
Thanks

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Old 04-08-2016, 04:46 PM
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PrimeredPontiac PrimeredPontiac is offline
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Posi is sold, axles still available.

  #9  
Old 04-15-2016, 06:56 AM
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PrimeredPontiac PrimeredPontiac is offline
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$130 + shipping for axles and c-clip eliminators

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