Locking in hubs.

Submitted: Wednesday, Oct 29, 2003 at 14:30
ThreadID: 8175 Views:1187 Replies:4 FollowUps:1
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Hi,

Is there any reason why I can't engage 4x4, high or low range, without locking in the hubs on my Patrol? I've done it numerous times when not needing the 4x4 ability but needing the lower gears and so far no dramas.

Regards
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Reply By: Foss - Wednesday, Oct 29, 2003 at 15:40

Wednesday, Oct 29, 2003 at 15:40
G'Day Ray

The reason the book and most people will tell you not to do that is simply that the rear axles/driveline are not designed to handle the torque load on there own that the lower gearing can produce. With hubs locked in 4x4 H or L the front prop shaft is driven which takes half the load of the rear prop shaft.
I.E. If you were to rev the engine and drop the clutch with low range engaged and hubs unlocked you would stand a good chance of snapping an axle, exploding a transfer case or similar.

It's fine for moving the van or trailer around slowly, just be careful not to apply power or load.

Cheers
Foss
AnswerID: 35592

Reply By: Savvas - Wednesday, Oct 29, 2003 at 15:54

Wednesday, Oct 29, 2003 at 15:54
What model Patrol?

Most Patrols have auto hubs that can also be locked. If you have these, when you engage 4WD Hi or Lo you are actually in 4WD. Therefore you are risking wind-up of the drivetrain if you're on a hard surface.

It's also not uncommon to hear of broken axles and tailshafts when using Lo range in 2WD.

AnswerID: 35596

Follow Up By: duncs - Thursday, Oct 30, 2003 at 11:12

Thursday, Oct 30, 2003 at 11:12
Savvas

The majority of Patrols prior to the GU had manual hubs

Duncs
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FollowupID: 25770

Reply By: kezza - Wednesday, Oct 29, 2003 at 21:21

Wednesday, Oct 29, 2003 at 21:21
Patrol axles are very robust - dont hear of many breaking - you have to drive them like you hate them to even go close to breaking them. No probs using low range 2wd but just go easy.

kes
AnswerID: 35642

Reply By: Ray - Thursday, Oct 30, 2003 at 11:32

Thursday, Oct 30, 2003 at 11:32
Thanks for all the replies.
AnswerID: 35684

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