Worked on the Volvo rear diff today. Getting frustrated with the Fiat - can't figure out the idle surge fixed. AC system is done finally, thank goodness.
Note: 999-7160 special tool required to remove rear axles without damage to casing
Installed the carrier bearings 32008X/Q x2
about an hour or so to get the mating surfaces free of anaerobic sealant remains
preload shim on right side, left side gets the backlash adjuster
right side cup & preload shim going in
diff in, cover sealed with anaerobic sealant, torqued to 18ft/lb
new axle seals 8653928 x2
preload set (5.25 turns), then used old seal to install new seals
Had to drill & tap the remains of the rear CV, it was jammed in the pinion flange
Next I can remove the flange, and replace the Haldex filter & rebuild the pump.
On the Fiat, still trying to resolve the idle issues. Found the IACV connector I used is numbered backwards compared to factory diagrams
factory diagram
Tried flipping the ground & signal wires to what should be, and then the engine won't rev, TPS does not register. The two circuits are not directly related in terms of wiring, so I don't know where to go with this. I did order a new OEM IACV, as the aftermarket one is definitely non-functional.
I modified one of the dead ones to make a manual adjuster - it works but requires one setting for startup, and another for driving, ot practical for daily driving