Great Lakes 4x4. The largest offroad forum in the Midwest - View Single Post - Differential Case Breaks (or, "Do I need a new carrier?")
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Old June 28th, 2007, 08:07 PM   #1
Jeeperz Creeperz
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Default Differential Case Breaks (or, "Do I need a new carrier?")

These are the most common axles you'll find. I left a few axles out because they pertain mostly to cars or are of no interest in using in an off road vehicle.

Differentials can be used "up to" the gear ratio stated and then you need a new gear ratio for the "and higher" ratio.

There are exceptions to these rules in that there are some gears that are made in a "thick" style that will fit the lower ratio carriers (most notably the Dana 44 4.10, 4.56, 4.88, and 5.13 ratios).


AMC 20 - up to 2.73 and 3.08 and higher

Chrysler 7.25" - All ratios

Chrysler 8.25" - up to 2.45 and 2.71 and higher

Chrysler 8.75" Tapered Pinion - All ratios
Chrysler 8.75" Straight Pinion - All ratios

Chrysler 9.25" - All ratios

Chrysler 10.5" - All ratios

Dana 28 - up to 3.45 and 3.73 and higher

Dana 30 - up to 3.54 and 3.73 and higher

Dana 35 - up to 3.31 and 3.54 and higher

Dana 44 - up to 3.73 and 3.92 and higher

Dana 60 - up to 4.10 and 4.56 and higher

Dana 70 - up to 4.10 and 4.56 and higher

Dana 80 - up to 3.73 and 4.10 and higher

Ford 7.5" - All ratios

Ford 8.8" - All ratios

Ford 9" - All ratios

Ford 9.75" - All ratios

Ford 10.25"/10.5" - All ratios

GM 7.5" (10-bolt) - up to 3.08 and 3.23 and higher

GM 8.5" (10-bolt) - All ratios

GM 8.875" (12-bolt) Truck - 2.54-2.73, 2.76-3.42, 3.73 and up

GM 8.875" (12-bolt) Car - 2.54-2.76, 3.07-3.90, 4.10 and up.

GM 9.25" IFS - All ratios

GM 9.5" (14-bolt semi-float) - All ratios

GM 10.5" (14-bolt full-float w/removeable pinion support) - up to 4.10 and 4.56 and higher

GM 11.5" (14-bolt full-float w/non-removeable pinion support) - All ratios

Toyota - All ratios
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Last edited by Jeeperz Creeperz; March 23rd, 2010 at 08:31 AM. Reason: Added Ford 7.5"
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