Salisbury Differential Dilema

G'Day Landyites,

HEEEEELP!-

After retreiving what was left of my filler plug from INSIDE the diff housing, and spending an hour with a magnet and degreaser attempting to remove all the lovely sharp shiny bits of metal and the fuzzy little ones, I was quite satisfied that there was no damage to the crownwheel nor anything else that was immediately visible. A little amount of backlash, but well within what I consider to be acceptable. I bolted up a new rear plate, (The old one had a hole in it where the filler plug had been punched partially through it after being picked up by the crownwheel) and filled it with oil. Tentatively took it for a drive - LOVELY, no drama.....except when I tried reverse and get a very strange clunking noise, it goes backwards no question, but boy is it an ugly noise.

Given the astounding lack of coherent meaningful information offered above, I realise that the next question may be deemed by your esteemed selves as a little broad, nontheless ask it I shall.........

Anyone have ANY idea WTF it might be??? - erm, - its deffo not the new filler plug!

Best regards

Kris

Check if you can ... does it make a grim noise on the over-run, like from 30 mph on the flat smooth road take your foot off the gas pedal and listen ....

If it makes "THE" noise, suspect the bearings of the diff input shaft letting the pinion move back and forward a tiny bit.

However, I don't think it will be that. What else did you have to touch?

One-Way noises are interesting!

CharlesY

CharlesY - SPOT ON -

I pulled the plate off again and there is deffo a small amount of movement in the pinion - BUGGER! - Didn't check for that first time, was just too relieved to see crownwheel intact with no tooth damage. Ah well, we live and learn, (usually the hard way!)

Many thanks

Kris

Was that play some back-and-forwards movement?

Like, to and from the front to the back?

I don't think this is good news at all, and you should restrict driving for fear that the pinion chews the crownwheel to bits.

Your IMMEDIATE first check is to take off the propshaft at the axle input flange and make sure that the nut in the middle of the flange is TIGHT to no more than the correct torque about 35 kgf.cm.

I think your axle may have a collapsible spacer sitting between the diff pinion bearings, and as a result of your excitement earlier I fear it may have become a tad squished too much, which does the bearing fit no good at all.

Try tightening her up, then try a new collapsible spacer.

This assumes your axles uses the collapsible spacer system!

CharlesY

Your IMMEDIATE first check is to take off the propshaft at the axle input flange and make sure that the nut in the middle of the flange is TIGHT to no more than the correct torque about 35 kgf.cm.

This figure is the torque it takes (should take) to rotate the pinion in the axle when there is no other drag than turning the diff in the axle.

Essentially, there should be ZERO to and from (back to front) linear movement of the pinion and shaft when fitted.

ANY such movement means trouble in store as the incredibly close "fit" between crownwheel and pinion goes down the pan.

Sorry if the first post was confusing.

CharlesY

Hey, I am sure I am not the only LandyZoner who would like to know HOW you managed to send the axle filler plug into the casing to mix it with the diff and the crownwheel & Pinion!

You can tell me .... I promise it will be our little secret ... right Slob?

CharlesY