Discussion
MyM8V8 said:
Not with the wavetrac. The wheel on the ground maintains traction. That's the difference between Tru Trac and Wavetrac and why it was developed. Also Wavetrac is designed and made in USA TruTrac (Eaton Product) made in China.
Thanks,The made in China bit concerns me! but may explain a couple of things.
I had my diff checked today and the consensus is it's past it's best! there is really a massive amount of play to the extent it clunks every single time you change gear. I even have to slip the clutch slightly to smooth things out.
The car has recent new half shafts, springs,shocks and a rear end pack so everything else is nice and tight.
I take it then for road use a Wavetrac is better than a Truetrac and probably about the best diff to buy without going too hard core, I don't fancy a Kaaz or spool.
The car has recent new half shafts, springs,shocks and a rear end pack so everything else is nice and tight.
I take it then for road use a Wavetrac is better than a Truetrac and probably about the best diff to buy without going too hard core, I don't fancy a Kaaz or spool.
Global-i said:
I can't comment on the wavetrac but I have had a Truetrac fitted since mid 2009 with no issues so far.
The stub axles seem to have a large amount of movement, they have always been like it, no leaks from the seals as yet. I believe Gareth's (MYM8V8) was the same.
Drive wise it is certainly better than the OEM unit. I cant ever remember hear anything from it knocks wise, it just works and has taken some abuse over the years.
If you go this route mineral oil only in the diff.
I have had my Truetrac for about 3yrs and covered 15,000 easy miles, maybe I bought a slack one!The stub axles seem to have a large amount of movement, they have always been like it, no leaks from the seals as yet. I believe Gareth's (MYM8V8) was the same.
Drive wise it is certainly better than the OEM unit. I cant ever remember hear anything from it knocks wise, it just works and has taken some abuse over the years.
If you go this route mineral oil only in the diff.
Global-i said:
Sorry to hear your Truetrac has been condemned. Do you happen know what oil is / was in the diff? I believe the mineral oil requirement is important to functionality and longevity.
I have used the correct Royal Purple diff oil since it was new.The only thing I can think of, is maybe there is some slack in the Truetrac worm gears which is exaggerating the backlash.
I saw a video a while ago where this had happened,the unit was still working, but made lots of clunks.
I thought I had better update this thread just incase someone comes across it in the future. I did replace my Truetrac for a Wavetrac and I can say it has fixed the dreaded clunk. Even though I have driven less than 100 miles the difference was apparent straight away.
When my Truetrac was removed there were quite a few metal particles in the oil, so I'm not really sure what happened there as the car has an easy life.
I have since checked the stub axles (after the rebuild) for movement and they are nice and tight, there is very little movement in them, however I expect when the diff gets hot even that will disappear.
When I get a chance to use my car I will again update this thread with some additional details should anyone need them.
The diff was rebuilt by AAS in Newcastle, I can't recommend them highly enough.
John
When my Truetrac was removed there were quite a few metal particles in the oil, so I'm not really sure what happened there as the car has an easy life.
I have since checked the stub axles (after the rebuild) for movement and they are nice and tight, there is very little movement in them, however I expect when the diff gets hot even that will disappear.
When I get a chance to use my car I will again update this thread with some additional details should anyone need them.
The diff was rebuilt by AAS in Newcastle, I can't recommend them highly enough.
John
Edited by mfp4073 on Thursday 7th June 09:16
lincsls2 said:
Seems that AAS are really competent with these cars. I originally thought they were just an good exhaust specialist...
Good to know
Hello lincsls2, Good to know
AAS usually have alsorts of cars in their workshop, they have worked on some nice muscle cars including my brothers Pontiac Firebird Formula 400. They do specialise in exhausts, but they can rebuild engines, diffs and gearboxes. They are also an agent for Royal Purple products.
John
MyM8V8 said:
I trust that oil does not contain friction modifiers for LSD's?
As far as I am aware the oil does not contain any friction modifier, it is Castrol.SAFXJ 75w140This oil is suitable for most differentials with or without a limited slip diff. Let's hope it works!!!!!
I have only covered a small distance since having the new diff, but my car is so much nicer to drive. Having said that, I'm piss** o** with my Truetrac, I've spent more on diffs than I can believe.....not to mention Mrs mfp4073 is not exactly happy about it either!!!!!!!
MyM8V8 said:
I've used Trutracs and haven't had a problem, but the manufacturer is quite specific in his instruction (as is wavetrac) on what oil to use. I stopped using Royal Purple in these diffs a long time ago as I understand the LSD oil contained friction modifier.
If you ever used an lsd oil which included friction modifier you may well have damaged the diff.
Having said all that the Wavetrac appears to be better made than the Trutrac. Also to note; the Wavetrac is made in the States and not China as with Trutrac.
I think you are right, it may have been a combination of the wrong oil, too much slack in the stub axles, and possibly quality issues in manufacturing. But who really knows, what I can say is it wasn't abuse that's for sure, it had covered 20,000 easy miles, and it was well gone by then.If you ever used an lsd oil which included friction modifier you may well have damaged the diff.
Having said all that the Wavetrac appears to be better made than the Trutrac. Also to note; the Wavetrac is made in the States and not China as with Trutrac.
stevieturbo said:
Yes...and they also listed LSD suitable oils for mine...and I opted for the Motul variant. Pretty much any good gear or EP type oil....will already be LSD suitable, but they dont make a big deal about it anymore because old plated type diffs are just less common now.
But a Torsen diff has no parts whatsoever that will care about what oil is used, or additives. And even their carbon friction plates inside the diff ( which invariably do f
k all compared to their claims ) wont mind either.
Stevieturbo,But a Torsen diff has no parts whatsoever that will care about what oil is used, or additives. And even their carbon friction plates inside the diff ( which invariably do f
k all compared to their claims ) wont mind either.I have read you comments with interest, but how would I know if you are correct, and I don't mean that with any disrespect.
I have a new Wavetrac in my Monaro with less than 200 miles on it, and already I can't get a straight answer on the correct grade of gear oil to use.
I'm running Castrol synthetic SAF XJ 75w 140 at the moment, but I have now found out this has a friction modifier already added.
Wavetrac state that no friction modifiers are to be used.
However, Wavetrac UK list their recommend Motul gear oil, 75w 140, but it also has friction modifiers added.
The only oil I have found close to being suitable for a Wavetrac is Millers CRX NT 75w 140 synthetic, it appears not to have friction modifiers?
Any additional help would be appreciated.
Regards John
Edited by mfp4073 on Wednesday 20th June 15:54
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