Just finished doing the fronts today.. Did the rear several weeks ago. Anyone debating this upgrade don't incredible return on the money spent.. The rears made a huge difference the fronts also made larger improvement than I anticipated.. I went with a 1.2 lift as I tow a bit
Here was my process..
3/4 of an inch may or may not be correct for your truck here is how I came to that conclusion on my truck.
I installed the following harbor freight shims little by little until reaching 3/4 an Inch where the vibration at take off was gone
Anyone using this process...
Interesting... My pinion is at 6.2 after the TSB I added 3/4 of an inch of shims and I have a silky smooth take off and ride up to 75-85 have not tested it any faster.
Made mine from 1/4 flat stock.
I may try to adjust the pinion to 5.2 latter but dad always said if its not broke don't fix it..
Do you have the part number or link for those? I am doing the same thing and need 3/4 of an inch drop.. I am going to use those or maybe 3/4 square steel tubing? Currently have body shims installed for testing.
Just finished some experimentation, I had the TSB done which made the vibration better but it was still there.. So over the past couple days I have been shimming the center bearing to see if that helps. Yesterday after installing several different shims its gone. I had to drop the center...