MaxyMan

Well-Known Member

• Jun 19, 2012

• #1

Hi all, i have a fair amount of play in my rear diff. In gear and with handbrake off I can freely rotate the rear prop about 2 or 3cm. Loud backlash when driving. The ujs and prop are all fine its just slack in the back diff. What can i do about this as I'm a small mechanic and not too much knowledge. Any ideas cost wise of a new rear diff for a 86' fender 90? And what would labor costs be at a garage. Thanks.

 

scrappyloz

Active Member

• Jun 19, 2012

• #2

Id personally go for a good second hand one

 

tottot

Well-Known Member

• Jun 19, 2012

• #3

Seems like a normal amount of wear on an old landy,could the backlash noise be coming from gear/transfer box?

 

MaxyMan

Well-Known Member

• Jun 19, 2012

• #4

Thanks, much do they roughly normally go for?? I've seen Ashcroft diffs are quite pricey.

 

MaxyMan

Well-Known Member

• Jun 19, 2012

• #5

It could be gear transfer box, how will I find wich one it is??

 

tottot

Well-Known Member

• Jun 19, 2012

• #6

The slack is usualy found between main box and transfer box[wear on the mainshaft coming out of gearbox and wear in input gear of transfer box]Remove round plate on rear of transfer box,and turn gear by hand looking for movement on splines between both items.If worn all you can do insitu is squirt some oil down the splines which tend to run dry unless vehicle has been fitted with replacement cross drilled gear witch gets oil where its needed.

 

MaxyMan

Well-Known Member

• Jun 19, 2012

• #7

Thanks for the good help will look tomorrow

 

wack61

Well-Known Member

• Jun 20, 2012

• #8

I paid £100 for a good Salisbury axle for a 110 I had last year, there are good ones about for that sort of money

 

300tdistu

Well-Known Member

• Jun 20, 2012

• #9

time to fit a locker

 

Retroanaconda

Well-Known Member

• Jun 21, 2012

• #10

Surely it's far more likely that it's play in the halfshafts/drive members? Take the rubber hub caps off and see if there's rotational play in the splines underneath.

There should be only a very small amount of movement in the rear prop. Front should have slightly more, as there are more splined joints involved what with the CVs and all.

In any case, the axle should limit rotation (assuming the wheels are on the ground) before the transfer box does. There's usually a fair bit of play in that what with the diff, all the gears etc. and if the main box is in neutral (or the t-box in neutral) you can rotate one prop anyhow.

 

D

DBrands

New Member

• Jun 24, 2012

• #11

Retroanaconda said:

Surely it's far more likely that it's play in the halfshafts/drive members? Take the rubber hub caps off and see if there's rotational play in the splines underneath.

There should be only a very small amount of movement in the rear prop. Front should have slightly more, as there are more splined joints involved what with the CVs and all.

In any case, the axle should limit rotation (assuming the wheels are on the ground) before the transfer box does. There's usually a fair bit of play in that what with the diff, all the gears etc. and if the main box is in neutral (or the t-box in neutral) you can rotate one prop anyhow.

Click to expand...

I second it being the drive members/half shafts.