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new differential case needed?

312 Views 2 Replies 2 Participants Last post by  Dirt Dog, 
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I plan on changing the gear ratios in my dana 30 and amc 20 from 2.73s to 4.10s. Will I have to buy new differential cases to go to these new gears or can I do without these? They are pretty expensive, and I don't understand why some companies say that only 2.73 geared axles need to change the differential case. Thanks.
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Dirt Dog
Copy'ed from JeepGods page
In reply to:

M20 2.73 & down/3.07 & up

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In reply to:

D30 3.54 & down/3.73 & up

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Want more info......(great site)
jeepgod.net
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