Differential rebuild I think it's whining

Good morning.

The transmission requires ATF. I posted the type and amount below for you.

As far as the rear end, the bearing are worn and must be replaced. Basically, you will be replacing the carrier and pinion bearings in the differential.

https://www.2carpros.com/articles/how-a-differential-works

I attached diagrams of the bearings below. I also attached a YouTube video on the replacement.

https://www.youtube.com/watch?v=hK6k9R2iEvo

Roy

Fluid Types
Manual Transmission Fluid .................... Mercon ATF

CAUTION: Using a transmission fluid that indicates a dual usage MERCON and MERCON V in a transmission application requiring MERCON, may cause internal transmission damage. The use of any fluid other than the recommended fluid may cause transmission damage. Some fluid labels may indicate dual usage such as MERCON and MERCON V. These dual-usage fluids are not to be used in transmissions that use only the MERCON type fluid. These dual-usage fluids may be used in transmissions that require MERCON V use.
Capacities
Manual Transmission

Capacity .................... 3.7 Quarts

Note: Approximate refill. Service refill capacity is determined by filling the transmission to the bottom of the filler hole with the vehicle on a level surface.

If you drop the rear cover, it will have the ratio on the back of the pinion.

No, you need 4 bearings and 4 races, not 3.

I attached 2 pictures of the rear differential cover. One is 8.8 and the other is 9.25. That is how you tell what differential.

Roy

Can you post a picture of the cover?

Roy

Sounds like a plan.

I will be here all-day.

Roy

Thanks.

That is the first picture I attached. You have the 10 bolt rear, that is the small rear.

I attached a YouTube video which is on the bench from a Jag but they used the same rear as yours for replacing the bearings.

https://www.youtube.com/watch?v=OurJHaiy6kI

Roy

The fill plug is not on the cover, it is in the housing.

Yes, it is the ABS sensor at the top.

Roy

No, the fill plug is at the rear.

I attached a picture for you to view.

Roy

The part I circled is the fill plug in the picture.

You have an 8.8 differential in your truck. It is a 10 bolt rear.

The parts I attached are the correct parts for your truck.

Roy

No, it is not. The housing is different. The width is different, the pinion is different and the mountings are different.

Roy

It would be easier and cheaper to rebuild your differential.

Roy