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M47 Swap Rear Diff question 200

posted by  Smitty on  Wed Jul 31 08:33 CST 2013
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last visit: Sat Aug 9 22:44 CST 2014
[RELATED]

The diff is Dana 30, and I believe there are two different carrier sizes. You can probably get some good advice on what ring + pinion swaps will fit within your existing carrier at an off-road shop, as Jeeps for years used the Dana 30 for the front axle.

Fuel mileage will be pretty much a wash, IMO. Tire pressure and driving style can easily mask the difference that the axle ratio will make.

Be aware that if your car has ABS, you need to swap in an ABS-equipped diff if you expect the system to work - ABS cars have a different sensor and tone ring to pick up wheel speed. You'll also need a different speedometer to account for the tone ring sensor speed as well.






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