Transfer case gear ratio -
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Unread 10-06-2012, 12:42 PM   #1
Registered User
1998 ZJ 
Join Date: Oct 2012
Location: Salisbury, NC
Posts: 4
Transfer case gear ratio

I have a 98 Grand Cherokee 5.2L. The front and rear ends are both geared 3.73 where the transfer case is geared 2.72. Should the transfer case be geared the same? In 4lo the Jeep do not move it just grinds! Any help will be appreciated!

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Unread 10-06-2012, 01:47 PM   #2
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1995 ZJ 
Join Date: Dec 2010
Location: Norman, OK
Posts: 2,254
It does not matter what the t-case ratio is in respect to the axle ratios, thats just where you get another reduction from "low range". In high range the t-case is a 1:1 ratio, meaning the input speed is the same as the output speed, in low range the input speed is 2.72 times faster than the output speed.

If it grinds in 4low you either have something broken inside the t-case or the shift linkage is out of adjustment and its just not getting fully engaged into 4low. I would want to assume the shift linkage is out of adjusment, there is an adjustment rod/pinch bolt under the Jeep infront of the t-case right beside the trans on the drivers side. I would loosen that bolt and slide the linkage a little bit to see if that helps.
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