Detroit rear locker....am i crazy???

Well Moorey - I'm with you on this one. The CDL should not be part of the equation. If you are not going around a corner, then the rear diff should be locked - seems like that's what a locking diff should do. If one rear wheel is spinning, then why isn't the other one. Otherwise, it's not much of a locker.....

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Originally Posted by moorey

OK, so i have a small brain and am overthinking it all....but I can't accept/understand the fact that SOME power is getting to rear (turning one wheel), therefore detroit should be locking up when losing traction, regardless of CDL:(

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If your Detroit locker locked up on any light application of power you couldn't drive around a corner without the inside wheel leaving rubber on the road. It will lock when a threshhold is reached and you won't while your front axle is spinning gently. That's why when you engage the CDL there is then enough torque to lock the Detroit.

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Originally Posted by moorey

...again....this relates to the detroit rear locking up, HOW?:confused:

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It has to do with the detroit locking up as IT IS LOCKED ALL THE TIME - it should not be called a locker but is an unlocker.

I would say as others have that the detroit was locked as it should be but your`CDL was not locked so drive was going to the front with the rear freewheeling.

Jack your car up and test - move one rear wheel and the other rear wheel will also move in the same direction.

Garry

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Originally Posted by moorey

....oh, and 'fashionable' had nothing to do with it.....$500 per end was the incentive:p

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Great price, can you pm the details?

It needs the torque applied to the pinion and the resistance from the wheels, well, one wheel to operate correctly, so with the centre diff it wont function correctly

Also its very foolish to drive with wheel spin with the centre diff unlocked, it very quickly damages the cross pin and thrust washers in the centre diff, its rapid deterioration is due to the gear ratio's in the front and rear diffs, which means slipping a propshaft see's the centre diff side gears spinning way to fast and the other stationary

So to use your wordsm if you continue to do it, you are a moron:)

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Originally Posted by rar110

Great price, can you pm the details?

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No secret..... look up http://lucky8llc.com/ and buy when aussie dollar is strong;)

Cheap postage (if getting 2, ask to place as separate orders to avoid duty), and great to deal with.:cool:

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Originally Posted by moorey

Seeing how it would go first without engaging. Don't you ever try lines without engaging all your big guns, eg in 2wd (if not driving a landy), without lockers engaged or without CDL in?

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No never, I always engage the CDL if in doubt, I hate spinning wheels and scrambling up somewhere I can drive easily with everything locked up.

I also have a detroit rear and an ARB front, I try to not use my front locker until needed to save the CV joints etc, but the the CDL comes in and out all the time, if in doubt it is in end of story. I don't believe in being a hero attempting a climb without my CDL engaged, I don't see the point.

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Originally Posted by rovercare

It needs the torque applied to the pinion and the resistance from the wheels, well, one wheel to operate correctly, so with the centre diff it wont function correctly

Also its very foolish to drive with wheel spin with the centre diff unlocked, it very quickly damages the cross pin and thrust washers in the centre diff, its rapid deterioration is due to the gear ratio's in the front and rear diffs, which means slipping a propshaft see's the centre diff side gears spinning way to fast and the other stationary

So to use your wordsm if you continue to do it, you are a moron:)

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I recently destroyed my center diff after making two full-noise attempts at a steep slippery hill with the CD unlocked. I normally always lock it whenever wheel spin is likely but on this occasion I had a mental lapse......(I also have a rear Detroit FWIW)

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Originally Posted by bee utey

The Detroit can lock all it likes but without the CDL engaged there is no way ANY useful torque can be applied to the rear axle when the front axle is up in the air under very little load. With the CDL engaged the rear axle gets up to 100% of the torque when the front is spinning uselessly. Not having the CDL on for a steep hill is like breaking the front tailshaft!

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Kinda, the center diff will slip without the CDL engaged meaning that all of the drive will go to the wheels with least resistance front and rear. When CDL is engaged, there will be a 50 50 split of drive front and rear regardless, hence why it is call a center diff lock. Which brings us to the point of your little dilemma. I would not expect a Detroit to work without CDL very "well" off road in "low traction" terrain (road is high traction). You have a constant four wheel drive with three differentials, all open (without CDL and standard diffs). That's why the result would be different in say a Patrol, which has a chain driven transfer, as opposed to our differentially driven transfer. In a Patrol, the drive is split all the time 50/50, so they dont have this "problem" of one wheel turning when in the sand.

I would have thought that best practice would be to lock the transfer as soon as you get off the black stuff anyway.

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Originally Posted by klappers

When CDL is engaged, there will be a 50 50 split of drive front and rear regardless, hence why it is call a center diff lock.

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50/50 only when all the wheels have full traction. If the front wheels are in the air then up to 100% of the torque goes to the back. You can't supply torque to wheels without traction!! Only their average rotation speed will match the back. With all 3 diffs locked you could get nearly 100% of torque supplied to one single half shaft, which is why lockers can result in axles going BANG!!!

:D:D:D