Conversion of Dana 30 to positraction.

Has anyone done a rear axle conversion on the plain Jane Dana 30 to
positraction. I'm thinking of doing it on my '89 740 trubo 5 speed with ABS.

Pete

 

by psakaris dropped his wrench, scratched his head and
mumbled,

Pull the wheels and axles. Pop the diff cover and drain the oil. Mark the
end bearing caps for orientation and position. Pry/pop out the ring gear
assembly. Transfer the ring gear to the new carrier. Use new bolts. There
is a bolt retainer/oil slinger plate over the bolt heads held in place by
the side bearing. Measure the thickness from the outer bearing edge to
the splash plate. Measure the thickness of the splash plate. Add them
together. Transfer the side bearings and shims one at a time keeping
everything in order (Pull and press. If you can beg borrow or steal the
Volvo special tools it will be easier). Measure the distances on the left
side bearing as before. If the dimension is larger than before by the
thickness of the splash plate then you'll have to remove it. Some
assemblies were built for quick ring and pinion exchanges. If the plate
isn't there you can prebuild various ring and pinion setups to change
gear ratios in an hour or so.

Install the carrier back into the housing. Reinstall the bearing caps and
torque to spec. Hold the drive shaft with one hand and the ring gear with
the other. Check: that the pinion turns easily, that there is SOME free
play (gear face to gear face in the ring gear). Ring gear free play
compensates for component growth as the assembly heats up under load.

Refill with whatever synthetic gear oil meets the spec of the
manufacturer.

Be sure the carrier in the kit you buy has the sensor wheel/blocks
fabricated in the carrier or you speedo and ABS won't work.

Bob