afternoon all!
so I've recently come into possession of a 3.9 diff, and was wondering if anyone has any tips / guide on how best to switch out the old 4.2 for the new one? any pitfalls, things to know?
Thanks!
switching diffs
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- Minor Maniac
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Re: switching diffs
A relatively easy job to do with no pitfalls that I know of.
Has the axle case got the axle filler plug in the rear face of the banjo?
Has the axle case got the axle filler plug in the rear face of the banjo?
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- Minor Legend
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Re: switching diffs
Make sure that you put the halfshafts back in on the same side you took them out of, or you'll end up with them breaking!
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- Minor Fan
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Re: switching diffs
yup - filler is on the back of the axle, so will still have a place to top up
anything else I could check whilst I've got it off? checking replacing UJs? Which reminds me - I need to mark the prop shaft with chalk to indicate which side was up don't I?
anything else I could check whilst I've got it off? checking replacing UJs? Which reminds me - I need to mark the prop shaft with chalk to indicate which side was up don't I?
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- Minor Legend
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- Minor Fan
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Re: switching diffs
Nice easy job using basic tools make sure to tighten the housing up evenly and for the little amount they cost i would get a spare gasket I learned the hard way that tightening the housing unevenly ended braking it and over tightening the bolts lead to a broken gasket nothing worst than waiting another couple days for parts
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- Minor Maniac
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- Joined: Thu Jul 19, 2012 12:05 pm
- Location: Hampshire
- MMOC Member: Yes
Re: switching diffs
You normally mark the diff flange and the propshaft flange adjacent to one another before removal but as the diff will be new in relation to the propshaft there is little point in marking either.
If the balance does not feel right after fitting the propshaft it can always be turned on the diff flange by 180 degrees to see if the balance is better and/or any vibration reduced.
The diff assy is secured to the axle casing by studs, nuts & spring washers not bolts - mentioned in case someone queries their diff to axle case fixings.
Care should be taken (as stated above) when tightening the nuts.
Fit new diff gasket which has been lightly greased.
Phil
If the balance does not feel right after fitting the propshaft it can always be turned on the diff flange by 180 degrees to see if the balance is better and/or any vibration reduced.
The diff assy is secured to the axle casing by studs, nuts & spring washers not bolts - mentioned in case someone queries their diff to axle case fixings.
Care should be taken (as stated above) when tightening the nuts.
Fit new diff gasket which has been lightly greased.
Phil