R34 R2000 Diff Issues. Small Or Big Fix? Not Sure.

[iamme]

Hey guys,

New to the forum after purchasing an R34 Gt-t.

Im hearing some clunking noises coming from the back, so upon further inspection I can see a fair bit of oil and grime primarily around the LHS flange coming out of the diff.

The teeth on the outside of the flange seem more worn down compared to the RHS.

How do I diagnose if I just have to replace the whole diff, the flange itself or even just seal?

Like I said there is a real solid clunk when taking corners, is at its worst at low speed and with a little on the throttle.

Could this mean a new diff would be in order?

Any advice is appreciated!

Thanks

[hardsteppa]

Thise teeth are abs rings, wouldn't be worn.do your rear tyres scuff when taking corners slow, ie carparks?

[iamme]

Yeah heaps

[hardsteppa]

Read up on mechanical lsd's...u might have one.

[Jordy32]

If it's very loud it could even be welded..

As for the oil, looks like the little shaft seal is leaking and oil has been seeping out for a while.

Those teeth are just the ABS sensor

[iamme]

Managed to contact the owner before myself. He said it went through a few people before him but he didn't or hadn't heard of the diff being welded. From what Ive researched it could be a worn pinion gear. So anyway, found what seems to be a good one for cheap, housing and all. Will drop the old own out and open it up for reference sake.

[iamme]

So got a new diff, filled and ready to go in.

Getting the old one out is proving to be insanely difficult. I'm stuck on the 4 prop shaft bolts connecting up to the diff.

I've managed to get two off. Took about 1.5hrs on each. Literally tried everything. All soaked with WD for a good hour. Jack to apply force to a ring spanner was my best attempt but that didn't seem to get them to budge. The two that did come loose were done with a ring spanner and mallet. Tried for the third but gave up.

Probably the best bet now would be a cheap butane blow torch ?

Any ideas ?

Edited April 12, 2016 by iamme

[hardsteppa]

The mallet did it for me; maybe drop the tailshaft as well and give it a go once its off the car and you can get good angles?

[iamme]

Yeah I'll try that. Maybe jack it up higher this time so it has good clearance once on the ground

[KiwiRS4T]

Yeah I'll try that. Maybe jack it up higher this time so it has good clearance once on the ground

See if you can get some kind of drift on it and give it a few sharp blows to try to break the seal as it were.

[GeeDog]

Got a cordless angle grinder with a thin disk (if not - good excuse to buy one). Cut the heads off and replace the bolts.

[89CAL]

They are 10mm bolts not 20mm, im sure there's no need to grind them off . Piggyback spanners or breaker bar and socket with pipe on it.

Mine are always tight but have always been able to get them. I know theres not alot of room there so need to jack the car up etc to gain the room

[kingtube69]

They are 10mm bolts not 20mm, im sure there's no need to grind them off . Piggyback spanners or breaker bar and socket with pipe on it.

Mine are always tight but have always been able to get them. I know theres not alot of room there so need to jack the car up etc to gain the room

What this bloke said - piggy back the spanners.

I struggled when I did my clutch - Piggy backed the spanners and had my brother and I both putting force on them which eventually broke them free.

[hardsteppa]

Actually now i remember, i sacrificed a 14mm spanner for this job. Cut the open-end off leaving just the ring end and shaft, then slide a length of right-sized pipe over shaft to give you a breaker-bar spanner. I call it SST#438

[kingtube69]

Actually now i remember, i sacrificed a 14mm spanner for this job. Cut the open-end off leaving just the ring end and shaft, then slide a length of right-sized pipe over shaft to give you a breaker-bar spanner. I call it SST#420

Fixed it for you

[iamme]

Gave in. Got out the angle grinder and murdered those little buttholes.

Should have tried the breaker bar spanner. Exactly what I needed. Ah well.

Anyway. Now in search for two more bolts. Would the idea be to hit up a nuts and bolts place and match up the ones I still have?

[hardsteppa]

Ideally use the oem ones from Nissan as you will note the thicker section of the bolt that has no thread, that joins the 2 flanges....but really any high-tensile M10 bolt of the right length with a 14mmm head will do. Bolt shop, or Bunnings will have them.

[iamme]

Headed up to bunnings and talked to a guy that used to work in the auto industry . Bunnings don't sell m10 bolts with 14mm heads. Not that he was aware of anyway.

Got some off a mate in the end.

New diff is in and it drives so much better. No clunk at all. It was really intense before. Will open it up when I get a chance and see what's going on.

[iamme]

So opened it up and it looks like a 2way. Just not sure which one. Guess that would explain the clunk at low speeds around corners lol. As a daily and no engine mods I'm happy with viscous.

Anyone seen a similar two way?

Edited April 28, 2016 by iamme

[Ben C34]

Put it back in.