loose nuts on 80 series front diff.

Ben, Had the same problem on an MQ on the Canning, tightened every time we stopped. That was before the front diff housing broke in two. Maybe a need to check for cracking in the housing. Hope this helps.

Just a silly question. Why did you change from studs to bolts?
Was/Is the diff housing fitted with the correct pitch. They should be 8mm diameter by 1.25 pitch. Did you have spring washers on as well?

This info is second hand but a friend of mine had the same problem on his 80 series. He replaced all the nuts with nylock nuts & the problem was solved.

I haven't actually heard of this happening before. But I would have thought that replacing the studs with bolts was not the best idea. I would have used locktite on the nuts and probably replaced the springwashers.

If your keen enough to remove all the studs and replace them. You could try wiring them in. Then they shouldn't come out

I haven't actually heard of this happening before. But I would have thought that replacing the studs with bolts was not the best idea. I would have used locktite on the nuts and probably replaced the springwashers.

If your keen enough to remove all the studs and replace them. You could try wiring the bolts in. Either drill holes through the heads of all the bolts or see if you can purchase some already drilled. Then they shouldn't come out

looks to me like tail shaft alainment problem have your tail shaft ballanced drive saftley MAL

Ben. I have an 80 series to which I have fitted a 'Lock Right' to the front diff and when I 4wd I don't pussy foot around. The nuts were tight when I pulled the diff out and they are still tight now some 60,000 ks later. I agree with some of the above coments above. Firstly I would check the front D/S crosses for looseness and then have the shaft tested for balance. Secondly, check the pinion shaft for end and side float. Is the diff housing cracked or bent? Have longer front springs been fitted which are rolling the diff to too great an angle (this effects your D/S). I would also recomend that you install NEW studs, spring washers and nuts and seal the housing with black Silastic (it adheres even if oil is on the mating faces). And lastly, check all your diff housing locating rods for seized or flogged out bushes. And apart from that, I just don't know. Good luck.

Ben.
I have not had experience with this model but I expect that the axle housing is bent and the diff is not able to contact the housing correctly, note the purpose of a bolt in this aplication is to clamp two surfaces together and it is the friction between the surfaces that holds the diff not the bolts so wether they are studs or screws makes no differance. Eric.

Ben, I have struck this problem before with GXL cruisers that are full-time 4x4. The common factor was rough, corrigated terrain ie, gunbarrel hwy. The cure was to re-stud the banjo with larger diameter studs, which I think were 10mm diameter. This required drilling out the flange holes to allow for the bigger stauds. These provide more clamping effect and did the trick, it does require complete removal of the front diff to do the job, which is time consuming. Having said that, a friend along with me on another trip, had a 75 series troopy(part time 4x4) and it too came loose on the Ann Beadell hwy.So, that blew the full time theory into the weeds!

ya not Haydens mate that got stuck out Dargo way are you?

if not theres another one that did it.