Here's the deal, you jack it up, drain it, disconnect the trans linkage, remove 4 bolts for the drive shaft, remove 6 bolts that hold the front mounts, remove 4 bolts that go through the frame and axle tubes, disconnect the brakes, remove the frame end plate 4 bolts and take that off then roll the rear out. 4 bolts hold the pump on. Take them out, pull the pump scrap the old cork gasket off. Replace the gasket and reinstall the pump. Remove the brakes, 2 bolts on each side. Remove the rear cover 9 bolts. Pop the C-clips in the center of the diff and pull the axels out. Remove the C-clip that retain the seals if you have the external C-clips (some are on the out side some are behind the seals) remove the seals. Remove the axle tube bolts 4 bolts on each side remaining because you have already removed the 4 that held it in the frame. Pop the tubes off and clean up the mess that will be inside them. Drill a 3/8" hole in the bottom of the case for an oil drain on each side of the case. Clean and reassemble in reverse order. Here is the parts list you will need and cost.
Transaxle seals and gaskets
921-3004 gasket 1 cork gasket $5.33 $5.33
721-3014 gasket 2 carrier gaskets $6.50 ea $13.00
921-3020A seal 2 axle seals $6.11 ea $12.22
921-3015 gasket 1 rear cover $7.64 $7.64
$38.19
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