All reconditioned differentials receive the same treatment and build specifications. As an example, all differentials are completely stripped down to a shell.
They are then cleaned, washed and flushed to remove all dirt and oil. The pinion housing is then blasted and then painted with a hard wearing rust resistant finish to make the unit look like new.
All of the old bearings are thrown away together with the oil seal, drive flange, mud shield, nut etc.
The crown wheel and pinion are cleaned and inspected for signs of wear like scoring and pitting etc that can occur.
Attention is then paid to the differential carrier and planet gears. I have to make sure there is no excessive play in the pin through the differential carrier and check and inspect the planet gears. The same standards are used for these gears as the ring gear set.
After clean and inspection, all components are reassembled.
The pinion height and pinion pre loads are reset with absolute precision. The crown wheel is set with the correct amount of backlash and bearing preload. Precision blue is applied to the crown wheel as a final check to show the correct mesh after being set with a precision gauge.
New parts fitted in a standard reconditioned differential include, head bearing, tail bearing, carrier bearings, oil seal, mud shield, washer, nut, spacer, bolts, shims and drive flange Carrier bearing nuts are reused but look like new. The crown and pinion are re used in accordance with our guidelines. All the bolts are stud locked with the correct grade which is vibration proof and oil tolerable.