I could probably do both in about 30min on a hoist with air tools... That said I've had a couple of them apart
Honestly I would suggest you have at least 3hr on your first go, shouldn't take you that long but its hard to take a job and assign a value for how long it should take someone I don't know if ya get my drift.
You could top the rear diff off... Unless its like dripping I think you will be supprised at how little has actually escaped.
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