Rover Diff Pinion bearings

[tony cordell]

The manual says it is a bit aof a job to replace these bearings
with setting pinion height etc with shims
having never done one ay advice?

[daddylonglegs]

Tony,this is a rough guide to what you want to know.The inner (large) pinion bearing is the only one that has any influence on pinion height, but my experience is that good quality bearings these days are very precise and if you are only replacing them and not the crownwheel and pinion, the pinion height shim under the large bearing cup will be the correct thickness. The pinion bearing preload is important too. the shims to adjust this are behind the outer (small) pinion bearing cone. Don't make them too tight but not loose either. Of course you should reset the crownwheel to pinion backlash to what it was originally
(mark the carrier bearing caps and threaded adjusters with a centre punch).

If you wan't to make up a pinion height gauge, the dimension from the face of the pinion head to centre of carrier bearings is 3 inches plus or minus what is etched on the face of the pinion head. On genuine pinions this is usually Zero.
Bill.

[tony cordell]

Thanks Bill
I'm trying to trace a rumble that appears on overrun
I had the front prop break recently and was advised the pinion bearings/crushable spacer may have been damaged by the flailing prop.
as the rumble appeared after this hapened.
transfer box swapped out last week and tht made no difference.
new prop fitted.

[red90]

Does the sound go away with that propshaft off?

Anyway, if the pinion bearing is bad, it will feel loose at the pinion flange. The bearings are preloaded so it should be tight and you should feel some resistance to turning.

[daddylonglegs]

Tony, Are your replacement front propshaft UJ's in correct phase? They are not meant to be parallel as is normal practice. If they are that may be the cause of the rumble on overun.
Bill.

[tony cordell]

front prop off appears to loose the rumble
the joints are phased approx 45 degrees to each other.
brand new genuine GKN prop
I fitted the TD5 Defender one as it has a far greater working angle
the old was one contacting the yokes on full articulation

[daddylonglegs]

I am grasping at straws now Tony but maybe the flailing propshaft has bent either or both the pinion flange and pinion shaft.
I must try to keep abreast of later LandRover developments because I didn,t know they changed over to a collapsible spacer on Rover pattern diffs.
Bill.

[tony cordell]

Bill
maybe I have mis read the RAVE manual it shows the salisbury axle then the pinion bearings with a collapsable bearing spacer
I was lead to believe the Rover diff had this to.

[Bush65]

Tony,

Does the new prop (TD5 defender) have a double cardin joint at the t/case end, like disco II?

If so, the diff pinion should be inline with the prop shaft.

[tony cordell]

no it just has two Larger UJ's with wider angled yokes.
part number
TVB100610 IIRC