Patrol GR locks rear wheels in hi range

Post by **JeepJukka** » Fri Nov 06, 2009 5:46 am

Buddys Patrol GR have locked couple times now rear wheels.
first time this happened with made in Finland 3.4 transfer case gears, then we swap to 3.7 gearmaster gears. same thing again....... in hi range after few kilometers rear wheel locks ....... when shifted to lo-range, it runs normally.

what causes this? something broke in transmission or are we f.....d up transfer case rebuild?

Post by **JeepJukka** » Tue Nov 10, 2009 12:44 am

no ideas?

Post by **patrol man** » Tue Nov 10, 2009 1:14 am

not quite sure what your saying?

"locked the rear wheels" as in the rear drive shaft wont turn?

Post by **JeepJukka** » Tue Nov 10, 2009 4:26 pm

patrol man wrote:not quite sure what your saying?

"locked the rear wheels" as in the rear drive shaft wont turn?

yes, rear drive shaft wont turn in hi-range. but when shifted to low, everything works normally.

Post by **patrol man** » Tue Nov 10, 2009 7:43 pm

I would be having a good look at the high low selector fork, to me it sounds like it is picking both gears at the same time , the result been the lock up you are experiencing. Even if it is only picking up half a gear or only going across enough to grab the low gear it will do it.
This would explain why it only does it in high, as when you select low it goes all the way over to low, ie no fault. but back to high it is not going over far enough or is able to more back some and grab low as well.

just my thoughts, cheers.

Post by **ozy1** » Tue Nov 10, 2009 10:28 pm

ive never stripped a transfer down, but considering the patrols have neutral in between high and low, i would not think it could pick up high and low range at the same time,

just my opinion

Post by **patrol man** » Tue Nov 10, 2009 11:15 pm

As the high range drive goes strait through the transfer I cant imaging what else would cause it to bind up!

Post by **JeepJukka** » Wed Nov 11, 2009 12:54 am

same thing happened with both transfer cases........ it locked after few kilometers highway drive.

Post by **Wish I had coils** » Wed Nov 11, 2009 9:58 pm

could you see any damage on the other gears that you pulled out this might put you on to the right direction.

Post by **raptorthumper** » Thu Nov 12, 2009 6:12 am

There is a small pin that can come out, and i am almost certain you have left this loose in the transfer case and it is locking gears.

Quote" When you split the case there is a small dowel pin. It sits in the front alloy housing between the two selector fork shafts and can be easily lost, so look for it straight away before moving the cases around. Quote"

Have a read of this thread

http://www.outerlimits4x4.com/viewtopic.php?t=67207

_

Post by **JeepJukka** » Sun Nov 15, 2009 7:29 pm

first transfer case is now in pieces....... needle bearing is burned and totally jammed (that bearing is in between main shaft and biggest reduction gear)

seems like it´s caused by oiling issue...... dropped t-case and GL-4 oil....... not good combination?

Outer Limits 4x4 Board

Patrol GR locks rear wheels in hi range

Patrol GR locks rear wheels in hi range

Who is online