Query on freewheeling diff

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the_wolf said:
Rather than start a new thread ill just use this one. Had both wheels up earlier and they rotate completely independently of each other, as opposed to opposite rotations as they should when you turn a wheel. Pinion has no rotational movement whatsoever whereas even when both wheels were on the ground before it would rotate slightly. Surely both halfshafts haven't snapped at the exact same time and if so why wouldn't the pinion move? Also leading up to the diff going completely I believe this was the source of my vibration and on the day it did go I just lost all drive, tried to move in gear and it struggled to the point that it stalled. I finally got it going and it really struggled before the diff just went completely and now if I were to drive with prop on I get a very loud ratchet sound of gears on gears and it struggles to move. This was with the gearbox and transfer box in neutral. Got new diff to put in but just wondering if ill have to buy new halfshafts too
Click to expand...

cv or diff gears have gone then and cw and pinion by the sounds of it
 
So a new diff would sort it then? Apologies for going on like a mongo, I just like to have everything clear in my head so I know what I'm doing and if ill have to buy new halfshafts before the swap
 
quite possibly symptoms could be caused by diff pin failing and debris damaging cw and pinion ,as jai mentioned cw and carrtier can be bent which is obvious by tight and loose spots on turning diff flange which is what diff pinning hopes to prevent ,but since one wheel doesnt turn the other in the opposite direction with diff flange staionary diff gears or cv etc must be broken
 
Yea I reckon you've a knackared the crownwheel and the cross pin/internal diff gears have broken up thus not connected to any drive but the crownwheel is chumming up broken teeth
 
If your unlucky it's a cv but pull the axle ends off, prepare new diff and a bottle brush clean the casing clinically clean then replace all broken bits look for stress lines in the halfshafts where they engage in the diff aswell.

Make sure all bits of metal are out the casing are there any extra outward marks on the diff banjo/pan?
 
Last edited:
I'll be swapping the axle casing when I change the diff anyway as the previous owner bashed the diff pan to buggery so I've got time to fully prep it. Won't be able to inspect halfshafts until I'm doing the swap which will be Saturday. CV joints seem fine, no clunking when I'm turning at all and no resistance or noise when rotating the wheels with drive flange on
 
it's got to be one of the things mentioned above. either that or another wheel may have fallen off.
 
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