Anti spin rear axle?

[dodge man]

Just got a used Dodge 3/4 ton last week. The sticker on the inside of the glove box says anti spin axle. I had the back end jacked up on the back the other night, and when I spun the rear wheel on one side, the other side spun the oppisite direction. The test of a anti spin rear end used to be the wheels spun the same direction. Is this test no longer valid for a posi rear end? Maybe the rear end has been swapped out?

 

[V1Rotate]

What year is the truck and how many miles?
Sometimes the clutches in the differential will wear out after lots of miles, when that happens, the rearend will act like a non-posi rearend.

Or like you said, the axle may have been changed.

 

[dodge man]

Its a 2004 with about 106,000 miles.

 

[MikeD74T]

Jack up one wheel, if it will drive off the jack it's anti-spin OR put some grease under one wheel (on a smooth surface) & see if the other wheel will drive the truck forward. MikeD74T

 

[Egon]

Quick start on gravel might do it.:thumbsup:

 

[wmonroe]

The third generation Dodges, with the AAM, do not have clutch packs like the old Dana axles did, instead they have a gear antispin. My 2007 has anti spin and when i jack up the rear end and spin one tire the other spins the opposite direction. A quick burnout will show the antispin though, haha.

 

[Marveltone]

I've heard other people mention that if one side is spinning, just touch the breaks a little and the other side will grab. Never tried it with my Dodge, so who knows?

Joe

 

[kenmac]

some good info on how the system works


Anti-spin differential rear axle? - Dodge Diesel - Diesel Truck Resource Forums

 

[dodge man]

Yes I tested it out and it is an anti spin. By the way, the 4.10 gears and all that torque make for an awesome burnout.

Good link Kenmac, that answered a lot of my questions on how it works.

 

[Verticaltrx]

I've heard other people mention that if one side is spinning, just touch the breaks a little and the other side will grab. Never tried it with my Dodge, so who knows?

Joe

A lot of limited slips need a load to be applied to them to really get them to work. The harder they are loaded the tighter they lock (to a point.) Say you have one side of the truck in the mud and the other on dry ground. Ease the clutch out and the tires in the mud will just spin. Rev it up a little and dump the clutch and you'll probably get both back tires to pull. Applying the parking brake a little can achieve the same effect.