Front Differential (SU4) Diagram

RAYS B4U · May 20, 2020

I am looking for a diagram showing all the internal parts of the SU4 Front Differential. All of the infamous "JingleJingle" work orders I've seen mention the "Left Stub Shaft" coming in contact with the "Cross Pin". Looking at the diagram of the diff on gmpartsdirect. com I can't see a "Cross Pin". Does anyone know if there is a more detailed diagram of the differential available?

newdude · May 20, 2020

The items in question are #10, #12, #9 and #8. However per the bulletin, there is a special request form to order the updated version of #8 so the catalog part# is not supposed to be used to fix the issue. Dealer has to order it from the Warranty Parts Center.

RAYS B4U · May 21, 2020

17 hours ago, newdude said:

The items in question are #10, #12, #35 and #30. However per the bulletin, there is a special request form to order the updated version of #30 so the catalog # is not supposed to be used to fix the issue. Dealer has to order it from the Warranty Parts Center.

Thanks for the diagram newdude.

Do you know what part would be the "Cross Pin" they mention in the work orders that the "Stub Shaft is contacting?

newdude · May 21, 2020

1 hour ago, RAYS B4U said:

Thanks for the diagram newdude.

Do you know what part would be the "Cross Pin" they mention in the work orders that the "Stub Shaft is contacting?

I am retarded and edited my post. #30 is not the shaft that gets replaced, its #8 the left side.

The cross pin would be the pin inside #18 the differential. Also called center pin.

RAYS B4U · May 22, 2020

23 hours ago, newdude said:

I am retarded and edited my post. #30 is not the shaft that gets replaced, its #8 the left side.

The cross pin would be the pin inside #18 the differential. Also called center pin.

newdude, have you had the opportunity to see the end of the stub shaft and the cross pin, and could you see any evidence of the two coming in contact with each other?

RAYS B4U · May 31, 2020

Has anyone had the opportunity to see any evidence of the "Stub Shaft coming in contact with the "Cross Pin" mentioned buy the techs in the service work orders? You would think there would be some evidence of them rubbing together.