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Unread 08-28-2013, 06:29 PM   #1
Haggerty
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1991 YJ Wrangler 
 
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Location: Eagle, MI
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4 wheel drive play?

so i was checking my four wheel drive today and i started the jeep, and jacked one front wheel off the ground and i checked how much i could spin it and i got 25-30 degrees, i figured that was too much, and that i shouldn't really have any play. but i can do 4 wheel burn outs on dirt roads and i can feel it locked up when i turn. i just want to figure out if its too much. thanks

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Unread 08-28-2013, 07:56 PM   #2
taylor797
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That seems pretty normal to me. You have to remember everything that your spinning, a little bit of play in each u joint, gears, t case adds up
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Unread 08-28-2013, 08:04 PM   #3
Joe Dillard
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With it started & one front wheel off the ground & still in 2wd, you are not checking the 4wd operability if thats what you were thinking.

Also, since you have not filled out your profile, we have to guess if you are still running stock differentials.
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Unread 08-28-2013, 08:14 PM   #4
Haggerty
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it was running and in 4wd, and i replaced all the vacuum lines a while back, i have the stock axles. and one front wheel was off the ground
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Unread 08-28-2013, 08:36 PM   #5
Joe Dillard
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With it running & the tcase in 4wd (assuming the tranny was in neutral) there NEEDS to be movement of the front axle components before the vacuum disconnect collar engages UNLESS the remote possibility happens and the passenger side two piece inner axle shaft splines are lined up.

In other words - most of the time the differentials & axle shafts will need to spin some before the collar finds the sweet spot & allows for the axle shafts to lock together.
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Unread 08-28-2013, 08:38 PM   #6
Joe Dillard
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This collar slides over & locks the 2 piece inner passenger side axle shafts together before 4wd can occur. This happens by way of vacuum from the tcase and a CAD system.

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Unread 08-28-2013, 08:40 PM   #7
Haggerty
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I drove forward and in reverse, probably 4-500 feet to make sure it locked in
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Unread 08-28-2013, 08:42 PM   #8
Joe Dillard
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Ahh, I see (now that you are back filling us).
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Unread 08-28-2013, 08:48 PM   #9
Haggerty
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sorry guys, so you think its alright?
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Unread 08-30-2013, 12:45 PM   #10
Haggerty
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Bump
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Unread 08-30-2013, 02:22 PM   #11
jokerchief462
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Drive it like you stole it!!!

These things are old and yes there is some slack even in new ones its fine enjoy it!!

Sent from underneath my Jeep
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Unread 08-31-2013, 12:30 PM   #12
rambo3489
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Your fine. As stated above even with all new parts you will have play. It all adds up.

Drive the crap outta it until it breaks.
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Unread 08-31-2013, 12:39 PM   #13
CJ7-Tim
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Quote:
Originally Posted by Haggerty View Post
.... jacked one front wheel off the ground and i checked how much i could spin it and i got 25-30 degrees,...want to figure out if its too much. thanks
There is no tire spin, backlash measurement, doing so shows you nothing.

If the gears are not making excessive noises, it should be fine. The proper inspection would be to check backlash and gear pattern at the ring and pinion.
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