Diff shudder :(

[anyfin]

I took the sooks way out and replaced the complete diff center with a genuine Nissan diff center.

Crown wheel & Pinion, LSD & bearings complete.

Dont have time to try different fix scenarios.

Result, shudder and whine gone.

Booked in this Wednesday to get better diff breathers fitted. Oh and its hungry, so I,m going to get it a chip

Going with a Torquit chip, hope they are as good as the salesman

Probably should get the old diff looked at.

thanks for the heads up and advice.

anyfin
Doug.

[mudski]

How much did that set you back? Have you pulled the lsd apart and had a look? It would be interesting to see what its like.

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[anyfin]

$3600 genuine. Havent touched the old one, might get it looked at out of curiosity.

Have a mate with a 2006 3ltrcrd that his wife uses for towing horses.

Went BANG, he has got a second hand motor with 35k on it. Wants to Nads it. I have had a look on your site and may be in touch.

Where would he get a catch can from?

cheers and thanks.

[BigRAWesty]

$3600 genuine. Havent touched the old one, might get it looked at out of curiosity.

Have a mate with a 2006 3ltrcrd that his wife uses for towing horses.

Went BANG, he has got a second hand motor with 35k on it. Wants to Nads it. I have had a look on your site and may be in touch.

Where would he get a catch can from?

cheers and thanks.

Before you chip it get some gauges..
Chips imo are a quick road to fail town..
They increase boost and fuel but every engine is different.. so they all react in different ways..
Your egt's may go threw the roof and without gauges you'll be none the wiser..

And get your mate onto it aswell..

Ebay is the easiest place to get a catch can..

[mudski]

$3600 genuine. Havent touched the old one, might get it looked at out of curiosity.

Have a mate with a 2006 3ltrcrd that his wife uses for towing horses.

Went BANG, he has got a second hand motor with 35k on it. Wants to Nads it. I have had a look on your site and may be in touch.

Where would he get a catch can from?

cheers and thanks.

$3600! Yeah wow!

[jay see]

I've just been doing a bit of reading about Patrol lsd. Re..lsd clutch pack shudder. Here's what you do. drain out 500ml~ of oil from your rear diff, add some Nulon engine cleaner (or different brand), drive for 1000klm (doing figure 8s on soft ground from time to time). fully drain and replace with 85w-140 limited slip diff oil. should restore diff.

@abw Have you actually done this....

Would be interested in the end result.

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[abw]

Naa..not yet. Just some info I picked up on that other forum. I'm not sure if it's okay to provide a link?

[taslucas]

@abw Have you actually done this....

Would be interested in the end result.

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It was mentioned in this forum a few years ago. Not sure if the member actually did it but might be worth searching

Naa..not yet. Just some info I picked up on that other forum. I'm not sure if it's okay to provide a link?

>>>tappin from tassie

[abw]

Anyway, here's the link..it's post #16 http://www.patrol4x4.com/forum/nissa...ch-kits-17715/

[jay see]

I had a look at the link and sent an email to him.
Below is his reply.

Hi John, no worries. I sure have done the Engine Oil Flush thing on a few diffs, including the entire range of Patrols up to the Y61, a few Jackaroos of varying vintages, a Rodeo, some Pajero's, a bunch of Tritons, & I'm sure there are more vehicles that I can't recall right now.*


Does it work? One word - YES!!*


But not on Toyota style 'clutch pad material' LSD's; it tends to kill them at about the same rate they wear off the clutch pad type friction material anyway - so if your Toyota LSD won't limit slip any more or provide better traction than an pen diff, it usually means it's done more than about 40,000 km ans it's worn out anyway!! The reason the EOF thing works on the better metal disc/plate type LSD's run by the vehicles I've mentioned above like it does is that it really cleans the oil build up off the wave springs & metal clutch plate discs on those better LSD's. So I'm sorry if you are hoping to resurrect a Toyota LSD, that ain't gonna happen EVER, & shimming it up again even if you don't make it any tighter will only see it pretty much worn out in about 40k km anyway!! Similarly with the metal plate disc jobbies, NO LSD benefits for too long by putting in too many more plates or shimming the diff up tighter; they might work 'better' by transferring some torque a little sooner for a short while, but the extra pressure really only makes them wear out quicker.*


The thing to remember about both Open diffs & all clutch style LSD's (but not the screw type Torsen Diffs) is that they are Torque SHARING devices, it's just that the LSD's use pressure plates of some sort to limit the free spinning of a 'traction deprived' wheel & transfer a max of about 40% of however little torque it takes to spin that traction deprived wheel - and if that wheel is lifted & therefore takes no or a tiny amount of torque to turn it, the LSD can only 'share' a tad less than one half of nothing!! So you need to learn to use your left foot to feather the foot brake in order to load the diff up enough to provide*some*torque to share without stopping the wheel spinning; or if equipped with a rear wheel activated hand brake, you can use a notch or two of handbrake to do the same thing. Those techniques also work on the lesser diffs like the Toyota clutch pad material jobbies, but once again, it really only wears those out quicker!!*


Back to the oil flush technique, I learnt about it from a diff specialist, only he recommended replacing the entire contents of the diff oil with engine oil flush & running it for up to 5000 km - I was never that brave, so have only ever used about 350-500 mls of EOF after draining that much from the diff oil & then running them there full range of operation for about 1000km before replacing the oil with fresh diff oil, but it's never created any problems that I'm aware of. In fact, there are more than a couple of diffs I know of out there that have had this done to them a few times and are so far running well after travelling*more than1,300,000 km (yep, One point Three MILLION kilometres!!) Two of those diffs I owned & ran for the first 1.3mil km, and I know they've travelled more than 100,000 km each since I sold them!! Back when I was running a fleet of Patrol 4by's, once the diff got a little tired (usually up around 200,000 km or so) we'd do this, sometimes twice or more; with the test of success being letting the fresh oil filled diff attempt to drag a 1tonne pallet load of cement bags lifted up on a pallet truck across the warehouse with one rear wheel lifted clear of the ground on a wheeled trolley jack! If it couldn't drag the cement that far using the drive from only one wheel & the LSD transferred torque, we'd run the EOF thru it again!! For what it's worth, I generally prefer to use the Nulon Engine Oil Flush, but have used other brands with similar success.


How's that for enough info? Over to you.


Cheers


Peter

I took off the level plug that's on the side of the diff to have a look at the condition of the oil and there was the correct amount, but there was a bit if black stuff that probably shouldn't be there.


I'm going to give this a go. My theory is just a dump and refill won't clean anything.

Wish me luck...

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