Rear of the Year

Thanks to a few rainy days I managed to get the the drive shafts, wish bone, hubs and discs bolted up. The final installation required several trial fits and adjustments to align everything. Once I was happy the bolts were loctite'd in place and a dob of blue paint applied so i could identify what was completed.

Installing 7" Sierra differential

Installation sequence (well mine)
1.Lift the differential into position
2.Fit the front bolts B & C to centralise the diff equally between the chassis plates. Check the hole alignment and make any adjustments to the size and location, once happy with the alignment remove bolts B&C.
3. The diff needs to be raised to allow access to install bolt A in to the slotted hole. The bolt is inserted from the drivers side. Once installed the diff can be lowered back to its final position to allow the remaining bolts to be installed.
Note: Make sure you install all washers and spacers before you lower the diff and install the other bolts.
4. Re-install bolts B & C.
5. Install bolt D.
6. Mark and drill the hole (10mm) for the rear diff mounting.
7. Install bolt E.

Differential

Having bought two Sierra 7" differentials - ratio 3.62:1 or 3.92:1 after much deliberation and discussion I decided that I would install the 3.92:1 unit as this will give me the best all round performance. I have also decided to upgrade the standard type 9 gearbox to BGH close ratio fast road specification (on the wish list). The diff was prepared (shot blasted and laquered) and ready for installation.