Rear Differential Question
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Elder User
Joined: Sep 2012
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From: Smokey Mountains TN
Rear Differential Question
A while back i changed my rear differential from a 4:10 to a 3:55.
its been running great with no noise from the rear axle as far as i can tell.
today i had some issues on my u-joint, and while the rear axle was up on jackstands i noticed a problem with my differential:
while in gear and the brakes loose, i can not turn either wheel.. i should be able to turn one wheel in one direction and the other turns in the opposite?
with out of gear and blocking one wheel, i can not turn the axle... its like i have a locked differential.. any thoughts?
its been running great with no noise from the rear axle as far as i can tell.
today i had some issues on my u-joint, and while the rear axle was up on jackstands i noticed a problem with my differential:
while in gear and the brakes loose, i can not turn either wheel.. i should be able to turn one wheel in one direction and the other turns in the opposite?
with out of gear and blocking one wheel, i can not turn the axle... its like i have a locked differential.. any thoughts?
Cargo Master
Joined: Jul 2006
Posts: 2,756
Likes: 38
From: Nampa, ID
If I understand your situation correctly, this is normal. My assumptions from your statement:
1. Engine is off.
2. ZF is in gear.
3. Parking brake is released.
If this is the condition you're talking about, the rear wheels will not turn because they are locked in running position by the driveline. Place your ZF in neutral and try it again. The wheels should turn freely with the parking brake released and the transmission in neutral.
1. Engine is off.
2. ZF is in gear.
3. Parking brake is released.
If this is the condition you're talking about, the rear wheels will not turn because they are locked in running position by the driveline. Place your ZF in neutral and try it again. The wheels should turn freely with the parking brake released and the transmission in neutral.
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Elder User
Joined: Sep 2012
Posts: 611
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From: Smokey Mountains TN
engine is off, zf is in neutral, i can turn the wheels, but both spin in the same direction.
if i put it in gear, brake off, i can not turn one wheel.. shouldn’t the other one turn in reverse?
i am not aware of a limited slip and i do not have a locker. It is a stock sterling 10.25 with 3:55 gears.
if i put it in gear, brake off, i can not turn one wheel.. shouldn’t the other one turn in reverse?
i am not aware of a limited slip and i do not have a locker. It is a stock sterling 10.25 with 3:55 gears.
Fleet Owner
Joined: Aug 2004
Posts: 20,419
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From: AZ
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Elder User
Joined: Sep 2012
Posts: 611
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From: Smokey Mountains TN
thanks Glenn,
that makes me feel better.. this is what i have per code
D5- Ford Sterling 10.25 dual rear wheel 4.10 with limited slip diff (7400 rating)
so, when i changed the gears i guess i was just to ignorant to realize i got limited slip
that makes me feel better.. this is what i have per code
D5- Ford Sterling 10.25 dual rear wheel 4.10 with limited slip diff (7400 rating)
so, when i changed the gears i guess i was just to ignorant to realize i got limited slip
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Fleet Owner
Joined: Aug 2004
Posts: 20,419
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From: AZ
You bet Stefan, I like the limited slip! Mine once was making a lot of noise on tight turns. I put one of those Ford little bottles of limited slip in and no problems after. Warning, that stuff stinks!!!
Postmaster
Joined: Mar 2004
Posts: 3,897
Likes: 8
speaking of which. Always add the friction modifier to your limited slip when changing the oil.
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