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Unread 09-08-2012, 12:58 PM   #1
Lindo77
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Join Date: Sep 2012
Location: Calgary, Alberta
Posts: 1
Changing Front Diff Ratio

Hi all,

I just swapped by blown front diff with one from a wrecker. It said 3.55 on it (stamped), but after realizing there was a problem, I did the wheel turn counting "thing" and discovered it is 3.73. Really would rather not try to find another front diff. Wondering what it would take to change the gears to 3.55? Is it a complete rebuild, or easier? Can a home mechanic do it, or should I take it in?
'99 Jeep Grand Cherokee Laredo
Thanks for your help.

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Unread 09-08-2012, 05:02 PM   #2
BlueRubiconrich
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1986 CJ7 
 
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Location: worcester, Ma
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No I would go shop only on that one.
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Unread 09-08-2012, 11:36 PM   #3
BleepinJeep
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1988 XJ Cherokee 
 
Join Date: May 2012
Location: Kingston, TN
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thats a pretty tough job to get it right. last time I checked a new ring and pinion were about $250 and labor isnt cheap on that either. It might be cheaper to find another axle.
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Unread 09-09-2012, 02:36 AM   #4
ltrail
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1984 XJ Cherokee 
 
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Location: mesa, AZ
Posts: 1,462
If the jeep has any modifications and or you wheel it I would swap the rear gears if anything. Nothing wrong with a little more gearing. Gears are a fairly time consuming and very particularly set up thing.
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