loud crack noise from rear of car

[white90]

for ages now I've had a loud metallic crack noise from the rear of the 90 when changing directions (fwd/reverse)

I replaced:

A frame ball joint as it was worn

radius arm bushes

radius arm bolts

shock rubbers

the rear diff was rebuilt after loose crownwheel bolts were found

prop u/js were replaced.

I suspected the Maxi drive, drive members on the halfshafts

after a few emails with Mal of MD he advised his very unlikely as the drive members I have are designed for the 130 L/R being 10mm longer

with the halfshafts also increased in length.

A conversation with a mate about the problem he suggested Loctite on the pinion shaft then refit the diff pinion drive flange.

I did this on Monday and success!

after nearly a year of listening to the crack noise it has gone.

odd as the pinion flange was brand new genuine part.

[JST]

Glad you got it sorted

[FridgeFreezer]

odd as the pinion flange was brand new genuine part.

Is that really surprising?

[BogMonster]

interesting - my Discovery has a metallic crack/ping when changing direction, I might have to try that

[TheRecklessEngineer]

So does my Discovery - I always put it down to the brake pads sliding around. Worth investigation...

[MJIbex]

It's not just you or the Defenders.

Locite on Defender diff pinion is a genuine bulletin fix, from LR, for this that affected a lot of 05-06 plate vehicles!!! I had 3-4 demos that need this from new.

It's the same on a number of P38 rear drive flanges.

[TheRecklessEngineer]

Hmmm...i'm mostly a rookie with these differential type thingies....I'm not 100% sure, is the pinon shaft the shaft that goes into the diff, and the pinion drive flange the bit that the prop shaft bolts to?

[FridgeFreezer]

Yes - I thought a chap like you would know where his flange was

[mike4444244]

lol when i had a loud cracks in the back of my 110 it turned out to be the tub/roof shifting as it held the chassis together on cornering

Mike