diff rebuild

[dan1989]

hi all there is a problem with the pinion bearings in the diif of my 75 beddie. it makes a winning sound when driving at speed. is this an easy fix or is it best to replace the whole diff. it is a borg warner diff. any ideas would be great. cheers.

[Warren]

First off check and see if its got any oil in it, if not put some in and see what happens.

Warren

[Warren]

Further to this, as finding other diffs for beddies can be difficult, its better to work with what youve got, borge warner spares should be easy to find so getting yours adjusted or rebuilt could be the go.

Warren 

[Abdu]

First off check and see if its got any oil in it, if not put some in and see what happens.

Warren

Further to this, as finding other diffs for beddies can be difficult, its better to work with what youve got, borge warner spares should be easy to find so getting yours adjusted or rebuilt could be the go.

Warren  I know of three diffs in brisbane, all high ratio, one is original '74 bedford diff from UK ( which i brought with me) is suited for the 2.3 vauxhall 4 cylider engine. 2 is high ratio diff, which I have recently removed the axles due to a bearing problem, 3 is a high ratio diff, but has had the axle housing modified the suit the bedford, i believe they may be ford diffs.
If there is any interest in these p[ls advise.

[aussieneil]

I'm in the middle of a diff pickle myself, so maybe others can guide me, and also shed light on the original post.

My camper is a '73 (September), and it has a tired diff with whining and a lot of backlash. The sensible way to go seemed to buy a relatively low-mileage CF and use its diff (and bonnet, and doors, and a few other bits I could use).

I bought a '78 CF on eBay (the one where they reckoned it had done only 112,000km from new - sure!), pulled out the diff and had it fully checked over, re-bearinged and re-sealed.

Today I went to change the two, and they're TOTALLY different! The only common thing is the spring-to-spring spacing. The 'new' diff is much larger physically, has larger drums, different backing plates, different pinion flange bolt spacing, different U bolts, different everything!

The 'new' diff is 49/11 (4.45:1), while the old, squarer, lighter (English?) diff seems to be somewhere about a 4.6:1 ratio.

I think I'll simply make the mods to the tailshaft (shorten by about 3.5cm and fit the bigger flange/uni joint) and fit the diff/backing plates/brakes from the '78 in their entirety.

Is the 'new' diff a Borg-Warner? What's the 'old' one?

Any comments on changing the 2-piece tailshaft with a centre bearing to a one-piece now it has to be re-manufactured anyhow? (total tailshaft length will be about 68 inches).

Any guidance appreciated!

[Warren]

As Beddycrazy would say PICS PICS PICS

THe diff could be bedford or anything else.

As for the tailshaft John Abbot may be able to help I think he replacesd his 2 bit on for a once peice one.

Warren

[aussieneil]

Message received! I'll get some pics tomorrow when there's some light, and hopefully some above-zero temps!

The one-piece shaft interests me. A local driveline specialist (Morrisons CV & Driveline in Bendigo) said today that 71 inches was the general cutoff point to go 1-piece, and this would be a couple of inches within that. I'd hoped that metallurgy and technology would mean that a 1-piece would make more sense than a 2-piece now in 2011 than in 1973.

[John Abbott]

Hi Guys....Aussieneil, i looked into trying to get a one piece tailshaft for my LWB truck made up but my measurements were to long so i had to get a 2 piece instead. I had a sensational company here in Perth by the name of Hardy Spicer use a tailshaft from a VL TURBO 6cyl commodore and lengthen it. It still uses the commodore centre bearing but the front input shaft is for a trimatic and the rear suits a holden salsbury diff. The whole lot came to $590.00 thats new unis ,centre bearing,and mods. It was worth every cent.

[aussieneil]

OK, some pics as promised. (I hope I attached the pics correctly)

The first two are the existing diff - quite 'square' in appearance, and relatively light in construction.

The last two are the diff out of the low-mileage '78 CFS van (after being dismantled, checked, and new seals fitted). 49/11 ratio (4.45:1), much larger, heavier construction, different backing plates and larger-diameter drums, as well as larger drive flange.

[Jeff]

It looks to me that you have an old short wheel base back end in your van, and you are going to fit a long wheel base back end into it. This will have stronger splines,  and bigger brakes  (as you have said).
I can see no reason why it should not fit.     although it may pay to remeasure the driveshaft.