Hello everyone, I have a concern. I own a 02 f150 Harley edition. I recently took my truck to the local ford dealership and had them replace my rear axle seals and also the rear end fluid. After I picked my truck up I started to notice a vibration or shudder in the rear end at acceleration from a stop. Its more pronounced if turning one way (left or right) but goes away shortly, under 10 mph. Could the dealer have caused this? Thanks.

 

If they changed the fluid and you have a limited slip in the differential the friction modifier might have not been added to the new gear lube...

Post up your axel code and someone will be able to tell you what differential you have....this located on the door sticker...

Or

Contact the dealer

 

I do believe it is limited slip, took it back to the dealer and test drove with them. The mechanic said he put friction modifier in the rear but its not on my invoice of coarse. He also said its the clutch packs binding but funny I never had this issue til they touched it.