adam300tdi · May 14, 2013

this weekend im planing on changeing my front diff flange oil seal and changeing the rear diff flange from a 3 bolt to a 4 bolt.ive heard that its important to torque the diff flanges up correctly.what do you torque them up to???

jamesmartin · May 14, 2013

its only important to get it tight

discool · May 14, 2013

"what do you torque them up to???"
To what LR state in their workshop manual I guess, that's 130Nm

jamesmartin · May 14, 2013

or 96 lbs ft but for anyone without the means of setting that it doesnt really matter as long as bolt or nut is tight ,its only to stop nut coming loose not because it effects any setting in diff

adam300tdi · May 15, 2013

thanks for the help

j13pey · May 16, 2013

jamesmartin said:
its only to stop nut coming loose not because it effects any setting in diff

Really?

The pinion shaft that the nut tightens on to has a taper bearing on the rear of it.

As far as I am aware after removing a few, the torque is important.
Too tight and the bearing will wear out, too loose and the bearing will wear out, plus wear out the teeth on the pinion gear and crown wheel.

Please someone correct me if i'm wrong, just trying to help.

adam300tdi · May 16, 2013

ye id heard somehting like that.thats y i asked

jamesmartin · May 16, 2013

j13pey said:
Really?

The pinion shaft that the nut tightens on to has a taper bearing on the rear of it.

As far as I am aware after removing a few, the torque is important.
Too tight and the bearing will wear out, too loose and the bearing will wear out, plus wear out the teeth on the pinion gear and crown wheel.

Please someone correct me if i'm wrong, just trying to help.

i shall correct you then,flange does press on bearings but preload is governed by shims between the bearings not torque , tight is important exact torque isnt , salisbury axles use a crushable spacer but again setting isnt torque but just turns on nut to give rolling resistance

jamesmartin · May 16, 2013

adam300tdi said:
ye id heard somehting like that.thats y i asked

you misheard then

adam300tdi · May 16, 2013

thats y i asked

jamesmartin · May 16, 2013

if you have means torque it to 96 lbs ft if not no worries dont buy anything just for it ,early diffs have castlellations and split pin and no torque setting ,same diffs different fastener

j13pey · May 17, 2013

Thank you for the lesson

jamesmartin · May 17, 2013

j13pey said:
Thank you for the lesson

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