rtv on differential cover??

[Z45]

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

 

Condition/Concern:

Customers may comment on a chatter or shudder from the rear axle on vehicles equipped with an Eaton locking differential. This condition would be noticed in parking lot maneuvers, turning, or during locking differential engagement and may be more noticeable when the differential is hot. Locking differential clutch chatter may be causing this concern.

 

Notice: This does not apply to vehicles equipped with RPO QS4 (Quadrasteer) which is part of option package NYS. Quadrasteer vehicles use Dana axles and have a different fluid requirement.

 

Notice: This PI does not apply to vehicles equipped with a RPO G86 limited slip differential.

 

Recommendation/Instructions:

If differential clutch chatter is encountered in a vehicle equipped with an Eaton locking differential, flush, drain and refill the differential with new synthetic fluid, use the fluid part number listed in SI for the vehicle currently being worked on. If the condition returns, replace the rear differential clutch plates and refill the differential with new synthetic fluid, use the fluid part number listed in SI for the vehicle currently being worked on. Refer to eSI for clutch plate replacement and set up procedures.

 

Notice: Eaton locking differentials used in 10.5 rear axles are equipped with steel clutch plates. It is a design characteristic of these steel clutch plates to exhibit more clutch chatter than other models.

 

Important: Installing any friction modifier causes the clutch pack in the locking differential to slip and miss engagement. A fluid flush can often remove debris that is a contributor to clutch chatter. Adding friction modifier additive can cause a loss of locking differential functionality.

 

Notice: On Quadrasteer equipped vehicles, simply flush the rear axle and refill with the fluid listed in SI document 793720 under the steerable application.

[Badass69]

I reused mine when I changed out the fluids.. was fully intact, and no leaks.

 

Bingo. Reused my gasket as well with no leak. If the gasket is not torn there is no reason no to reuse it.

[Rocko973]

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

 

Condition/Concern:

Customers may comment on a chatter or shudder from the rear axle on vehicles equipped with an Eaton locking differential. This condition would be noticed in parking lot maneuvers, turning, or during locking differential engagement and may be more noticeable when the differential is hot. Locking differential clutch chatter may be causing this concern.

 

Notice: This does not apply to vehicles equipped with RPO QS4 (Quadrasteer) which is part of option package NYS. Quadrasteer vehicles use Dana axles and have a different fluid requirement.

 

Notice: This PI does not apply to vehicles equipped with a RPO G86 limited slip differential.

 

Recommendation/Instructions:

If differential clutch chatter is encountered in a vehicle equipped with an Eaton locking differential, flush, drain and refill the differential with new synthetic fluid, use the fluid part number listed in SI for the vehicle currently being worked on. If the condition returns, replace the rear differential clutch plates and refill the differential with new synthetic fluid, use the fluid part number listed in SI for the vehicle currently being worked on. Refer to eSI for clutch plate replacement and set up procedures.

 

Notice: Eaton locking differentials used in 10.5 rear axles are equipped with steel clutch plates. It is a design characteristic of these steel clutch plates to exhibit more clutch chatter than other models.

 

Important: Installing any friction modifier causes the clutch pack in the locking differential to slip and miss engagement. A fluid flush can often remove debris that is a contributor to clutch chatter. Adding friction modifier additive can cause a loss of locking differential functionality.

 

Notice: On Quadrasteer equipped vehicles, simply flush the rear axle and refill with the fluid listed in SI document 793720 under the steerable application.

 

Am I right in that this does not apply to my 2003 Silverado 1500HD? I checked in the glove box, and one of the components parts listed is G80, and according to some of the posters replying, chattering doesn't occur with G80 axle... right? Or are you saying that a G80 is an Eaton locking differential. It's getting confusing now...

 

Thanks!

[Z45]

G80 is a Locking Differential in trucks & SUV's but a G80 is a Limited Slip Differential in cars.

 

 

[mattymax]

I think this shudder chatter is what I'm feeling on my 2011 2500HD with the G80. Going to the dealer this week to take a ride with the service manager

[jsoto]

I just replaced my rear differential fluid yesterday. 50k miles

 

I used Mobil One 75W-90. It took less than 3 quarts.

 

I bought a new gasket and used the Gray stuff on the cover side only of the gasket and torqued down the bolt 20ft/lbs. No Leaks.

 

I was surprised how difficult the bolts were to remove. I realized the dealer used thread locker on each bolt. Also, the original gasket was put on with some sort of material making it difficult to shave off. The dealer really makes things tight for sure.

 

There was only a minor bit of shavings on the magnet which was a pleasant surprise.