Conversion of Dana 30 to positraction.

Discussion in 'General Motoring' started by psakaris, Jun 28, 2003.

  1. psakaris

    psakaris Guest

    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.

    psakaris, Jun 28, 2003
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  2. psakaris

    volvowrench Guest

    by psakaris dropped his wrench, scratched his head and
    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

    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.

    volvowrench, Jun 28, 2003
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