Recently the westfeilds diff has started to whine under power.

Ford english diff on unknown origin, age, or ratio. Which also leaks all over the place.

I shot a video of the noise with the rear jacked up. First is longer but proberbly doesnt show anthing the second one doesnt.

http://www.spurstow.com/spurstow/ebayphotos/DSCN8124.AVI

http://www.spurstow.com/spurstow/ebayphotos/DSCN8125.AVI

Ive read up about these, with the crushable tube being mentioned a few times, but im not 100% as to if this would cause the above symtoms, or where it is within the diff.

Am i right in saying that having removed the diff out of the front of the axle, when rebuilting you first replace the oil seal in the nose (input) and the two bearings that support the pinion and inputshaft. Which is then adjust right to get the correct preload/endfloat in the bearings. With the crush tube.

Then having got that right, you then bolt the diff back onto the front casing. And set the gear mesh right. With shims?

The the diff goes back into the axle (which in the mean time has had the wheel bearing and intergrale seals changed) slide the half shafts in, and bobs you uncal.

However, with suffent grief, you can damage (crush) the crush tube, upsetting the pinion bearings preload, which causes the mesh to cockup, making it whine?

The engine is a 1.9 cvh with maybe 130bhp estimated.



Diff is coming out shortly anyway, as im rebushing the rear with replacment rubber bushes becuase the old ones are shot.



Daniel

I take it the oil level is correct?

Mine started to whine, checked the oil and it was low. Topped up and its fine....

Hi

If your going to recon the diff you may as well replace the crush tube with a solid item. This stops the crush tube from further crush due to to extra load and leaking in the near future again. It's no extra cost so it's a no brainier.

Cheers Matt

Edit to say yes it's the crush tube that's continued to crush with usage that has lead to the leak past the front seal and causing the whine due to the loss of preload.

[Edited on 31/8/09 by procomp]

It did run slightly low on oil prior to the whine coming on, taking around 400ml to bring it back upto the leval plug. Ive topped it up again now and it still whines.

Glad to know im barking up the right tree anyway. Presumably its adviable not to drive it like it is too much?

EP140 oil with a dash of Moly slip might quiten it down for a while --- at the expense of increased oil drag

quote:

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Originally posted by britishtrident
EP140 oil with a dash of Moly slip might quiten it down for a while --- at the expense of increased oil drag

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Presumably in order the do th rebuild i would need.
- New bearings and seal for the pinion gear.
- A new crush tube, and possably ablity to fab a solid replacment.
- New wheel bearing and seal units for the ends of the half shafts.
- A half decent torque wrench to torque up the crush tube jobbie.
- A hydrolic press to press in the new beaings and rear bushes (which i'll be replacing at the time)
- Possably a hack saw and or blow torch to get the old bearings out?

Press, torque wrench and lathe i have access to.

Also presuably wise to inspect the crown and pinion gears for wear.

I know its been asked before, but is there a guide for this. Which haynes has the best coverage of rebuilding the english diff?


Daniel

Videos now at
http://www.spurstow.com/temp/DSCN8124.AVI

http://www.spurstow.com/temp/DSCN8125.AVI

How much damage would driving with the diff in the above do?
- Its not obtrusivly loud, but im keen not to damage it more than i have to before the rebuild clearly, assuming its currently ok otherwise.

Got a 2h out and back to a boat show for the weekend that it would be nice to do in the car, mainly so its there for the weeknd, aslo becuase it looks like it will be sunny and nice!

Also stafford a fortnight later, which im unlikely to get it done for. Then im back at uni with access to stuff.


Daniel

Boo!! echo, echo, echo...

setting up a diff is a specialist job, you have to ensure the pinion is set at the correct height, this involves selecting the correct shims when assembling the pinion, then you have to ensure the crown wheel is meshing correctly with the pinion, you have to adjust the mesh whilst also keeping the correct preload on the side bearings, you ideally need special equipment and lots of experience.

quote:

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Originally posted by arrow-engineering
setting up a diff is a specialist job, you have to ensure the pinion is set at the correct height, this involves selecting the correct shims when assembling the pinion, then you have to ensure the crown wheel is meshing correctly with the pinion, you have to adjust the mesh whilst also keeping the correct preload on the side bearings, you ideally need special equipment and lots of experience.

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