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Patrol GR locks rear wheels in hi range

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 6
Joined: Wed Aug 23, 2006 12:04 am
Location: Finland

Patrol GR locks rear wheels in hi range

Post by JeepJukka »

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?
Posts: 6
Joined: Wed Aug 23, 2006 12:04 am
Location: Finland

Post by JeepJukka »

no ideas?
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Post by patrol man »

not quite sure what your saying?

"locked the rear wheels" as in the rear drive shaft wont turn?
Living the dream on the hill that floods
Posts: 6
Joined: Wed Aug 23, 2006 12:04 am
Location: Finland

Post by JeepJukka »

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.
Posts: 286
Joined: Tue May 11, 2004 8:48 pm
Location: Toowoomba

Post by patrol man »

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.
Living the dream on the hill that floods
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Post by ozy1 »

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
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Location: Toowoomba

Post by patrol man »

As the high range drive goes strait through the transfer I cant imaging what else would cause it to bind up!
Living the dream on the hill that floods
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Joined: Wed Aug 23, 2006 12:04 am
Location: Finland

Post by JeepJukka »

same thing happened with both transfer cases........ it locked after few kilometers highway drive.
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Post by Wish I had coils »

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

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


_
98 GU Patrol. 4.0L Barra, BF engine. 3" Lift. 85% Marks reduction Gears. 35x12.5x15 Maxxis Bighorns, 3" Zaust.
http://www.outerlimits4x4.com/viewtopic.php?f=16&t=86831&start=210
Posts: 6
Joined: Wed Aug 23, 2006 12:04 am
Location: Finland

Post by JeepJukka »

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?
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