Classic Rear diff problems

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frog hopper

frog hopper

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Hi all, 1988 VM classic. I think there might be a problem with the input bearing on my rear diff.
Had a bit of a noise (again :mad::mad:) yesterday, grinding/wirring coming from the transmission, got home and had a quick feel around underneath and everything seemed OK except the nose of the rear diff was a bit warm, this after a run of about 3 miles.
This morning took the input flange off (no play anywhere by the way) and after easing the spacer out I squirted some molyslip into the bearing, everything back together except the dust shield which was loose anyway, and a short road test and noise is gone.
Yes I checked the fluid level 1st and not only was it right, it was clean.
Now then, questions. Is there any way to get the bearing out to replace without taking the whole diff apart?? maybe a bit of heat around the nose of the diff and a slide hammer/hook??
If I have to take the diff apart then I might as well service one I happen to have laying about, trouble is it is out of the front axle of my 200Tdi 90, are they interchangeable??
 
There are 2 sets of taper roller bearings on the input shaft, the one you can see when you take the flange off & another one that's inside the housing & can only be removed by dismantling the diff.
Set up using shims & dial gauges with a pre-load & I'd suggest you need to have a look at a manual before deciding what to do.
Don't know about the interchangability of your other diff.
 
Last edited:
8
frog hopper said:
Hi all, 1988 VM classic. I think there might be a problem with the input bearing on my rear diff.
Had a bit of a noise (again :mad::mad:) yesterday, grinding/wirring coming from the transmission, got home and had a quick feel around underneath and everything seemed OK except the nose of the rear diff was a bit warm, this after a run of about 3 miles.
This morning took the input flange off (no play anywhere by the way) and after easing the spacer out I squirted some molyslip into the bearing, everything back together except the dust shield which was loose anyway, and a short road test and noise is gone.
Yes I checked the fluid level 1st and not only was it right, it was clean.
Now then, questions. Is there any way to get the bearing out to replace without taking the whole diff apart?? maybe a bit of heat around the nose of the diff and a slide hammer/hook??
If I have to take the diff apart then I might as well service one I happen to have laying about, trouble is it is out of the front axle of my 200Tdi 90, are they interchangeable??
Click to expand...
When my A series front diff which was the original one from 1983 made a really horrible sound that made my boss drop the transfer box ( well it didn't do any harm to give it new washers and output bearings) I was proud to be right :D and swapped it for a rear one from a 1990 one I had lying around .
Noise gone.
Now my 1983 diff had still one slightly chipped tooth but new bearings and satellites and has been promoted to rear diff, because that has been leaking too much.
Moral: mix and match. Just never swap crown wheel and piñón separately.
I like the early ones because they have a drain plug
 
Ratae said:
There are 2 sets of taper roller bearings on the input shaft, the one you can see when you take the flange off & another one that's inside the housing & can only be removed by dismantling the diff.
Set up using shims & dial gauges with a pre-load & I'd suggest you need to have a look at a manual before deciding what to do.
Don't know about the interchangability of your other diff.
Click to expand...
Looks like I shall be taking the diff apart then.:mad::( I do have the Brooklands manual, so I might have half a chance.
 
anitarrc said:
8
When my A series front diff which was the original one from 1983 made a really horrible sound that made my boss drop the transfer box ( well it didn't do any harm to give it new washers and output bearings) I was proud to be right :D and swapped it for a rear one from a 1990 one I had lying around .
Noise gone.
Now my 1983 diff had still one slightly chipped tooth but new bearings and satellites and has been promoted to rear diff, because that has been leaking too much.
Moral: mix and match. Just never swap crown wheel and piñón separately.
I like the early ones because they have a drain plug
Click to expand...
Thanks for that, if I have to get into the diff I might as well just repair the old one. Or do you think I could renovate the one that came off the front of my 200Tdi 90 to replace the one on the rear of my 1988 VM range rover?? That would be the better option for me as I could have one to swap and "Buttercup" would only be off the road for a day.
 
Yes saves a lot of time. is exactly what happened with mine. Lost a day on the transfer box but swapping the diff took less than two hours, of which 30 minutes were dedicated to a round nut on the diff housing :eek:
The Rangie was my daily workhorse then so there was all the time in the world to repair the diff later, as I said before it is my rear diff now.
Good luck. Get all bearings in decent quality (Timken or at least NSK ) a decent oil seal and be patient till it all sounds fine.
PS nice Rangie .Can you guide me to a bigger photo?
 
No probs
IMG_2237.JPG


and heres me 90
IMG_2340.JPG

Thats after a lot of work and still not quite finished. Are they ever???
 

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