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AuthorTopic: Discovery Rear Diff  (Read 1075 times)

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Offline knightrider

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Discovery Rear Diff
« on: November 29, 2006, 14:20:57 »
Hi
 i,m asking this question for zuludelta5
will a 200tdi rear diff fit a 300tdi apart from changeing the out put flange from 3 bolts to 4 bolts as he wants to put a 200tdi rear prop on as well...
many thanks
                 
                       Richard.... :D
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Offline Range Rover Blues

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Discovery Rear Diff
« Reply #1 on: November 29, 2006, 14:57:00 »
No, the 200 is 10 spline, the 300 24 spline.  He'll need the half shafts also and even then it might not seal properly.
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Offline Henry Webster

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Discovery Rear Diff
« Reply #2 on: November 29, 2006, 15:14:28 »
Just to confuse the issue, I believe that some late 200's were 24-spline, but it is unusual.  Also with a LR there is always the possibility that it has already been changed.

As RRB says there are important differences between fine and coarse spline axles.

H
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Offline Tyke

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Discovery Rear Diff
« Reply #3 on: November 29, 2006, 15:29:35 »
Input flanges are different as well . . . depends whether it has a rear uj or rubber doughnut.
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Offline Range Rover Blues

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Discovery Rear Diff
« Reply #4 on: November 29, 2006, 15:38:40 »
But if you fit one from the front it will have the 4 bolt flange.
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Offline landyman Ash

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Discovery Rear Diff
« Reply #5 on: December 01, 2006, 18:26:39 »
How easy is to change the 3 bolt flange to a 4 bolt?

Do you have to rebuild the diff??
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Offline Divster

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Discovery Rear Diff
« Reply #6 on: December 04, 2006, 09:34:47 »
Not hard at all, undo big nut infront of the flange (normally the hardest part as it is usually on dft) remove old flange from the shaft and fit new. It's usually worth while fitting a new pinion oil seal whilst your at it.
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Offline extreme90

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Discovery Rear Diff
« Reply #7 on: December 05, 2006, 22:35:53 »
however to do the job correctly u should measure the torque off and torque it back up the same
but how the f*** that works i cant understand cos it takes more force to undo it
so you will in that case get inacurate readings  :roll:
cant remember where i read about it tho  :roll:
slept alot since then  :lol:
danny
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Offline Range Rover Blues

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Discovery Rear Diff
« Reply #8 on: December 06, 2006, 00:39:40 »
I got confuse with this at first.  On a Ford English axle the 2 taper roller bearings supporting the pinion were preloaded by the drive flange nut.  You tighten the nut against a collapsable spacer untill the correct running torque on the pinion was achieved.  The nut had to be put back in exactly the same place.

On the Rover diff, preload is adjusted with shims under the head of the pinion or the other end, so you are tightneing the bearing against a shoulder.  that way the torque is the key, not the position and the flange can be removed as many times as needed with no penalty.

Easier to service that way.

And shims are a very english thing.
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Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
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