Discussion
stevieturbo said:
mfp4073 said:
OK ,thanks.
one wheel in the air test.......yikes!
If one wheel goes light, it will lose traction.one wheel in the air test.......yikes!
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.
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.
I have a Wavetrac, and I can assure you 100% one wheel can and will spin if it goes too light.They claim their discs in the middle that offer some pre-load can help prevent this....but they absolutely do not. With any Torsen, it needs resistance to work, so if one wheel gets light enough...you lose all traction. The little friction discs in the middle of the unit are supposed to offer that resistance in the absence of friction from the tyre giving it.
It may help a little....but it really is only a little if at all.
I had a regular Torsen before that, and I really cannot tell any difference, and have many datalogs showing the single wheel spinning like feck.
And even under hard braking where one might go light, again there are occasions where 1 wheel can easily lock up.
At the time I needed a new diff anyway, and had high hopes for the Wavetrac....they lasted until the first hillclimb. At least for my 8.8 nobody really seems to make a proper LSD for them though that would offer any strength.
At least the Wavetrac is a nice sturdy looking piece.
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.
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.
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:
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.
stevieturbo said:
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.
I have a Wavetrac, and I can assure you 100% one wheel can and will spin if it goes too light.They claim their discs in the middle that offer some pre-load can help prevent this....but they absolutely do not. With any Torsen, it needs resistance to work, so if one wheel gets light enough...you lose all traction. The little friction discs in the middle of the unit are supposed to offer that resistance in the absence of friction from the tyre giving it.
It may help a little....but it really is only a little if at all.
I had a regular Torsen before that, and I really cannot tell any difference, and have many datalogs showing the single wheel spinning like feck.
And even under hard braking where one might go light, again there are occasions where 1 wheel can easily lock up.
At the time I needed a new diff anyway, and had high hopes for the Wavetrac....they lasted until the first hillclimb. At least for my 8.8 nobody really seems to make a proper LSD for them though that would offer any strength.
At least the Wavetrac is a nice sturdy looking piece.
Try a 9" diff?
mfp4073 said:
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.
Hope this helps.
(You have to question the quality of anything coming out of China?)
By the way. There is no mention of country of origin on the Eaton Detroit Tru Trac boxes, but by US law it has to be detailed on the invoice you get, and yes, its China.
mfp4073 said:
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.
Check the helical gears and if you can get a replacement. The LSD housing seems sturdy enough but I managed to break the heads off the allen bolts holding the thing together. Replaced with aircraft quality items.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.
Edited by MyM8V8 on Sunday 21st May 12:14
MyM8V8 said:
Very surprised at your results.
Try a 9" diff?
Dont think that would fit in an 8.8" axle Try a 9" diff?
And so far the CWP etc have not broken for no reason, so switching to a 9" makes little sense.
There isnt much to be surprised about. If you contact them they'll even tell you they sell steel inner discs to replace the carbon discs for more aggressive applications which should offer more internal resistance.
Of course they tell you that....you order the diff along with spare steel plates only for it all to arrive with spare carbon plates and to be told they dont offer the steel plates for that particular unit.
Really ? oversight or what ?
Maybe the steel plates would helped more. But they dont generally sell those for road use anyway. But as I dont do many miles, I wasnt concerned about an wear...in the end didnt need to be concerned because they didnt make them for my unit anyway.
Although I did pay extra for the spare plates..and they sent carbon which I'll probably never ever use now. Waste of money that
So they are very aware the one wheel spin aspect is by no means fixed by their unit. It may be improved slightly over a regular torsen..but that isnt the same thing
But as said, unless you're using the car hard, racing, tight corners etc etc, then it really is of little concern. On the road, drag strip, etc etc there is no problem. But it really is annoying on the tighter hillclimbs for me. But I'm accepting of that because I like Torsens, I see them as stronger than diff's with a diff pin, aka conventional designs, and under no circumstances was I going to use any type of locker diff.
So the WT is still a good unit. Oddly Gripper dont make anything for the 8.8, and I contacted 3JDriveline and they dont either.
And in the US it seems to be mostly spools, lockers or basic Torsens
fred bloggs said:
I put a kaaz. I don't get any one wheel spinning, but I do get some clunks LOL.
I haven't had any problems with my Kaaz diff and it's been in a year or two, my diff was clunking before I fitted the new diff setup . My clunking was the driveshaft splines, standard shafts but a lot of power going through them. Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff