Drive Shaft Turning In Neutral -One Wheel Off the Ground
#1
Registered User
Thread Starter
Drive Shaft Turning In Neutral -One Wheel Off the Ground
Hi guys,
While I was working on my brakes, truck was idling in neutral with one wheel off the ground and noticed the drive shaft turning with the hub. Stops when hub is stopped. Is this normal? Does the clutch have some engagement with flywheel even in neutral, or should I adjust something?
TIA
While I was working on my brakes, truck was idling in neutral with one wheel off the ground and noticed the drive shaft turning with the hub. Stops when hub is stopped. Is this normal? Does the clutch have some engagement with flywheel even in neutral, or should I adjust something?
TIA
#3
Registered User
Thread Starter
Thanks, Irab!
#4
Registered User
If one rear wheel is ON The ground and the other rear wheel is OFF the ground, the differential will "connect" the drive shaft to the wheel that is in the air
This is why you get stuck when you DONT have a "locker" or other traction adding differential
In theory, there should be VERY LITTLE frictional drag on the wheel that is in the air, any slight imbalance (pebble caught in the treads) should cause the wheel to rotate - which through the differential, will cause the drive shaft to spin via the pinon gears rotating in the diff
NOW - if you have a Locker or traction diff - things get different
This is why you get stuck when you DONT have a "locker" or other traction adding differential
In theory, there should be VERY LITTLE frictional drag on the wheel that is in the air, any slight imbalance (pebble caught in the treads) should cause the wheel to rotate - which through the differential, will cause the drive shaft to spin via the pinon gears rotating in the diff
NOW - if you have a Locker or traction diff - things get different
#5
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Thread Starter
#6
Registered User
If you are NOT pushing in the clutch and the transmission is in neutral, the input shaft of the transmission is still spinning at the same speed as the crankshaft of the engine, just like normal driving (without letting the clutch slip). When you are not pushing in the clutch, the clutch is fully engaged no matter if you are in neutral or in gear. I bet the little bit of friction from the fluid and parts inside the transmission is causing your wheel to turn.
How difficult is it to stop the wheel from rotation? I don't think it would take much because you just need to overcome the friction and movement of the fluid against the gears. (If I am thinking about this correctly ) If the transmission is in neutral, the gears are not physically connected from input to output shaft.
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#8
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Thanks, guys! [/QUOTE]
Last edited by RAD4Runner; 08-11-2017 at 08:08 AM.