Diff Bearings!

[LANDYTIM]

Having a problem with yet another set of bearings! The bearings in my rear diff casing have gone and I was wondering if it is possible to replace these bearings? If so how much? where from? and how easy is it?

All input appriciated!

Cheers
Tim

[Budgie]

I'm sure if you give Ashcrofts a ring then they will be able to help you.  

[muddyweb]

It is perfectly possible.   Which bearings have failed ?

The real question maybe should be "why they are failing ?"

[LANDYTIM]

this is the first set in the diff casing that have gone. I had a set off wheel bearings go but the guy at the garage said that was just wear and tear.....

What could cause the diff casing bearings to fail?

cheers
Tim.

[muddyweb]

Ah, OK... misunderstood... I read that as being another set of diff bearings.

In my experience one of the main reasons for diff bearing failures is oil contamination.  They do fail through wear and tear of course as well.

[LANDYTIM]

Nah, only the first set of diff bearings.

I bought the landy as a big boys toy and have been changing the bits and pieces but these just died. The oil in the axle was brand new as it was changed when the rear bearings and stub axles were changed. Is it hard to change these or just a case of knocking the old ones of the input gear then the new ones on?

I belive there are two sets in the case?

Inner and outer?

[chuggaman]

Nah, only the first set of diff bearings.

I bought the landy as a big boys toy and have been changing the bits and pieces but these just died. The oil in the axle was brand new as it was changed when the rear bearings and stub axles were changed. Is it hard to change these or just a case of knocking the old ones of the input gear then the new ones on?

I belive there are two sets in the case?

Inner and outer?

i have just been down this road.to change the pinion bearings is quite a job without the specialist tools and proper manual.they need to be preloaded and the pinion height is also set at the same time.

i bought a s/h diff with (so far so good pinion bearings).

mike

[LANDYTIM]

thats not what i wanted to hear

I have two diff cases both with [!Expletive Deleted!] bearings and wanted to change these so i also had a spare!

Who/how much will it cost for it to be done and who can do it?

Cheers
T

[chuggaman]

cheaper to buy a s/h diff.i phoned all the landy specialists near to me only to find that they will only sell recon diffs.

quite a shame really as i have the complete instructions to do this job correctly.

you need the specialist tools and a block that one sits on to put the correct shim in after you have pulled the two pinion bearings to the correct preload.there are about 17 different thickness of shim.

then you need to set the pinion height (the way that it meshes withe the crownwheel).

then you need to set the backlash.

from my experience of this so far,a diff in pieces is not a very complicated strip down and rebuild,but you need the tools.

coming to think of it does anyone know where to get service tools

lrt-54-505
lrt-54-506
lrt-54-503 setting block

or the equivalent items

mike

[LANDYTIM]

I have all the parts for the job....

[!Expletive Deleted!] case, new bearings all that lot.

how much for someone to put it together?

[LANDYTIM]

Got bored with the idea of re-building the diff. Paid £50 for a diff and casing that had only been on a vehicle for 6 months.

Can anyone tell me why they make both 10 and 24 spline diffs and half shaft...??

Cheers

T

[landyman Ash]

I got my bearings from Devon (see Muddyweb) and make sure they are Timpkin ones, last ages!

[chuggaman]

Got bored with the idea of re-building the diff. Paid £50 for a diff and casing that had only been on a vehicle for 6 months.

Can anyone tell me why they make both 10 and 24 spline diffs and half shaft...??

Cheers

T

age of vehicle and design

10 spline are older

mike

[rollazuki]

The pinion height only needs to be checked if the large pinion taper roller bearing is replaced, non of the other bearings affect this measurement.
Ive replaced both sets in mine, and the new bearings were exactly the same as the old ones, the heights were cock on, and needed no adjustment of the pinion height.(maybe I was lucky, but Im guessing they rarely differ)
The other adjustments are easy to do with a dial gauge and a spring balance, no real rocket science. give it a try on an old diff, at least when you can make the measurement on an old worn out diff youll be happy to carry out the checks on a good 'un.

[LANDYTIM]

Ive put on the second hand diff....

No clunks when rounding sharp corners....

Drives really well.......

Then I hit 50mph and there is a vibrating noise coming from underneath me!

The diff lock doesnt come off when u wack the lever over either, it stays on for a while and then the light goes out!

Suggestions Please!

[Budgie]

With the vibration, can you give a little more info.
Where does it sound like its coming from, front/rear of transmission, can you feel anything through the steering?
Did you tighten the propshaft bolts up on the handbrake drum?
Propshaft U/Js need replacing/greasing.
Propshaft centre spline worn.
Diff flange not tight enough.

With the Difflock, if there is tention on the gear when you release the difflock then it wont dis-engauge until the tention is released, sometimes you have to reverse a little to get it to come off. I don't think it's anything to worry about. My Disco does it all the time.  

[LANDYTIM]

The vibration sounds like it is coming from the rear. Behind the transmission. I had to drive it a short distance with the half shafts out. It didnt make a noise then! Its definately from the rear though!

[chuggaman]

The vibration sounds like it is coming from the rear. Behind the transmission. I had to drive it a short distance with the half shafts out. It didnt make a noise then! Its definately from the rear though!

sounds like your newer diff is not as it seems.

is there any up or down or left to right play on the diff flange.

make sure the diff flange bolt is tightened to 130 nm.

check rear prop ujs for wear.

if not then its back to the diff again

mike

[LANDYTIM]

all prop UJ's are fine. I need to go and check the diff flange bolt but have to borrow a tourque wrench first!