nrwphoto
NAXJA Forum User
- Location
- Appleton, WI
I know shims sound like modification, but this is about a factory setup.
I recently replaced the springs on an XJ I bought last month with Dorman heavy duty leafs and Moog replacement coils. At the same time I replaced the lifted shackle with a factory replacement and all new shocks. It sits at 19" hub to fender front and has settled to 18.5 rear. (currently a little higher than factory UpCountry specs)
I am now getting some driveline vibration under acceleration. Not horrible, but noticeable. I checked my driveline angles and got..
Axle yoke - pointing up 6.5 deg
T-case output - pointing down 4.5 deg
Drive shaft - 14.5 deg
This means the the axle yoke is pointing 2 deg above the t-case. Correct me if I am wrong but I thought the angles should be equal or the axle should point down 2 deg, so that during load the axle rotates up to equal out.
Does this mean that I need a 4 deg shim to bring the yoke down? Why would this be if the XJ is sitting near factory? Transmission mount looks good and it has the factory crossmember not a drop like Rusty's.
I recently replaced the springs on an XJ I bought last month with Dorman heavy duty leafs and Moog replacement coils. At the same time I replaced the lifted shackle with a factory replacement and all new shocks. It sits at 19" hub to fender front and has settled to 18.5 rear. (currently a little higher than factory UpCountry specs)
I am now getting some driveline vibration under acceleration. Not horrible, but noticeable. I checked my driveline angles and got..
Axle yoke - pointing up 6.5 deg
T-case output - pointing down 4.5 deg
Drive shaft - 14.5 deg
This means the the axle yoke is pointing 2 deg above the t-case. Correct me if I am wrong but I thought the angles should be equal or the axle should point down 2 deg, so that during load the axle rotates up to equal out.
Does this mean that I need a 4 deg shim to bring the yoke down? Why would this be if the XJ is sitting near factory? Transmission mount looks good and it has the factory crossmember not a drop like Rusty's.