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[jay140285]

Right,

2002 Jeep GC 4.7V8 60th Anniversary edition.

When its cold I have noticed this happening.

Its at low speed, and happened only a few times and after coming off an icy drive or icy road but it feels like a very poor change from the auto box or as it a diff is locking / unlocking and there is a decent clunk noise.

No change in driving, still pulls fine. It feels like when I had a Land Rover and I had to use the lever to put it in 4WD and if the cogs were not 100% lined up it would clunk into FWD.

Any thoughts??

Cheers James

[scrw]

check the correct oil is in the transfer case (or just change it) & check the joints in the front prop, the TC coming in & driving the front axle is seamless on mine. Have you tried in in 4-Lo, that will lock the centre diff take that out of the equation

[jay140285]

mmmm, no idea what oil is in the transfer case. what should it be and how often should it be changed??

Its been serviced on the dot but last couple at a independent place not main dealer.

Cheers

[big g]

Have a look in here...........

http://www.birtydastards.com/frm/index.php?topic=8091.0

[scrw]

1.6 litres of Mopar 247 transfer case oil

Cost me around £20 when I changed it a few weeks back, wrong oil causes the clutches to grab, may be your issue

[Mike Pavelin]

No friction modifier in the diffs will also cause bother.

[jay140285]

Thanks for that, Job for the weekend then.