4WD Won't engage - JeepForum.com

 
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post #1 of 8 Old 01-06-2017, 10:57 AM Thread Starter
rwdaddio
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4WD Won't engage

I have a 99 Grand Cherokee Limited 4.0
Transfer case went dry, since then the 4WD will not engage.
What did it ruin to keep it from engaging ?
Will it be cheaper to repair or replace ?

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post #2 of 8 Old 01-06-2017, 11:21 AM
HarryH3
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Which 4WD system? If it is the QuadraDrive model, then the progressive coupler that engages the front driveshaft is probably ruined from running with no lubrication. A new coupler is around $400, plus labor if you have a shop install it. You can probably find a used case in the junkyard for less, but it's a bit of a crap shoot as to its condition. Another option is to replace it with a transfer case from a SelecTrac WJ, but that is a tad more complicated. There are several threads about the conversion in the forum.
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post #3 of 8 Old 01-06-2017, 11:27 AM
alfaitalia
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....or quadratrac.....uses the same tc as q-drive.

If you can't fix it with a hammer, you've got yourself an electrical problem!
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post #4 of 8 Old 01-11-2017, 10:15 AM Thread Starter
rwdaddio
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Thank You
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post #5 of 8 Old 01-11-2017, 03:33 PM
ZJPunk98
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a junk yard or part out TC will be your cheapest fix. Crown automotive is your next source for a new PC (progressive coupler-- this is what died) and chain plus rebuild kit for your TC.

edit: Quadratech and Kolak sell the Crown TC kits. Mopar should have them as well.

Erik

98 ZJ 5.2L JGC Limited Sold
02 4.7L HO JGC Overland

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post #6 of 8 Old 01-11-2017, 04:29 PM
NoCoCherokee
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Just out of curiosity, since this is my first 4WD. How does one know when the 4WD engages for sure if you are in the vehicle? Is there a light on the dash? I tried it out on mine (just bought it Sat) and when I engaged it, the system FELT like it was using the 4WD, but how does one know for sure if you are IN the vehicle?
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post #7 of 8 Old 01-11-2017, 04:39 PM
tymaoaretae
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Quote:
Originally Posted by NoCoCherokee
Just out of curiosity, since this is my first 4WD. How does one know when the 4WD engages for sure if you are in the vehicle? Is there a light on the dash? I tried it out on mine (just bought it Sat) and when I engaged it, the system FELT like it was using the 4WD, but how does one know for sure if you are IN the vehicle?
You don't know for sure, there are no sensors anywhere. You can assume mechanically, if all the pieces are there that 4lo is engaged, or if you have selec-trac that any of the 4wd modes are engaged. But with Quadradrive and Quadra-trac, you can't know the state of the progressive coupler other than by whether it seems to be working or not.

2003 WJ LTD 4.7, 242HD, PR44+ARB+RCV & D44HD+varilok+BTF 4.56, 7" RC LA (Clayton coils + pucks), Bilstein 5165, OBA, Lizardskined & Monstalined inside.
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post #8 of 8 Old 01-11-2017, 05:01 PM
NoCoCherokee
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Quote:
Originally Posted by tymaoaretae View Post
You don't know for sure, there are no sensors anywhere. You can assume mechanically, if all the pieces are there that 4lo is engaged, or if you have selec-trac that any of the 4wd modes are engaged. But with Quadradrive and Quadra-trac, you can't know the state of the progressive coupler other than by whether it seems to be working or not.
Thanks. Also, don't mean to hijak the original thread. Please continue. I'm in serious learning mode.
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