thoughts on tru trac lsd

[vxss5.7]

hey guys...
im thinking of gettin a tru trac for my clubby as i keep killing lsd's... i see there is no point for kazza as i dnt do any track events or drifting... just probly skate up street thats about it... is this diff anygood for me?

[ice57l]

ive got one, no lsd chatter and it works fine. no noise, but i think it actualkly gives more traction. but flair the clutch a little and around you go...

[Benno25]

One of the best mods I've done :)

[SirNemesis]

Same here, one of the best mods I've done and I haven't broken it yet!

[hRTHSV]

I got one from the first btach made and I just brought another for one of my other cars, great bit of gear.

[vxss5.7]

irite cool as ive got quote for 1050 i give them the diff is that about right?

[IJ.]

Ran variations of them in the last car, LOVE the things, no push on slow corners, a bit disconcerting at first due to the way they work, the car doesn't slide down the camber of the road like an LSD+lots of power so there's no real sensation of wheelspin with the car tracking straight.

The 1st Torsen I ran was ok till you lifted an inside wheel in a corner then it would lose all drive as they torque bias so 40% of 0 is 0.....

The TrueTrac for the 9" gets around this with a simple preload pack, not sure if the Commodore TT's use this or not but my 9" one was far too tight so I modded it to work with a lot less preload.

I'll be putting one in both of my CrossTracs then see if I can source the BMW version for the fornt Diffs in each car.

[awesome _vzss]

defently one of the best mods you can do for your car.

Tru trac FTW...

[PDFAST]

No1 mod to do works well for me blown 6.0L :goodjob: :bow:

[SSZ.]

ive had one for nearly 2 years now and its still going strong, even with my style of driving

[Souljah]

Awesome bit of kit. You don't get the flick back, tank slapper from hell either.

[RATTLER]

Unfortunately I have to disagree with everyones comments here! For me, the "Tru Trac" was crap! I snapped the hemisphere in half so if you are going to be pushing big power, then I would stay away from them! Since the 9" with the Detroit Locker (below) and Richmond Gears it handles the HP without a problem :bow:

http://i182.photobucket.com/albums/x10/mesatinken/Rattlers%20build/NewLocker003.jpg

http://i182.photobucket.com/albums/x10/mesatinken/Rattlers%20build/NewLocker002.jpg

[Evman]

Unfortunately I have to disagree with everyones comments here! For me, the "Tru Trac" was crap! I snapped the hemisphere in half...

Interesting to hear! Was it Harrop or Eaton?

[SirNemesis]

Interesting to hear! Was it Harrop or Eaton?

and how much power?

[RATTLER]

Interesting to hear! Was it Harrop or Eaton?

Ev it was an Eaton and SirNemesis 425rwkw

[Souljah]

Considering you were over the specified power limit of the eaton it's no wonder it broke.

[SirNemesis]

Hrmm, bugger. That is more than the Eaton is 'rated' to handle, but mines still holding up at more power than that. You've got me worried it might explode any day now :1peek:

[RATTLER]

Considering you were over the specified power limit of the eaton it's no wonder it broke.

Broke?? lol..... it clean snapped in half! Never seen anything like it before!

As said originally, if you are pushing high HP then the "Tru Trac" is not your option.

Scotty

[RATTLER]

Hrmm, bugger. That is more than the Eaton is 'rated' to handle, but mines still holding up at more power than that. You've got me worried it might explode any day now :1peek:

The thing is, I wasn't doing a burnout when she let go! We were at Powercuise and hammering down the main straight and she snapped at around 200km/h! I now run 500rwkw and the 9" with the Locker works a treat!! :bow:

[Blown 540]

I thought you split the diff technics billet housing Scotty with the Detroit locker in it ? Same as the one I had.

I am pushing 825 rwkw through a tru trac , so far so good.

[SirNemesis]

Lets be fair though, perhaps you should say "if you are pushing high HP then the EATON "Tru Trac" is not your option."

There is a reason Harrop make a much stronger version.

[RATTLER]

I thought you split the diff technics billet housing Scotty with the Detroit locker in it ? Same as the one I had.

I am pushing 825 rwkw through a tru trac , so far so good.

Yes mate, did that to but 1st was the Eaton Tru Trac, then bought the 9" (with a supposid Locker in it) and ended up being a standard LSD!

The lesson learnt from that was never buy anything "2nd hand"!!

Running 825rwkw you are REALLY pushing that Tru Trac to its limits dude! :confused:

[feistl]

The thing is, I wasn't doing a burnout when she let go! We were at Powercuise and hammering down the main straight and she snapped at around 200km/h! I now run 500rwkw and the 9" with the Locker works a treat!! :bow:

I would expect them to break on a main straight like that rather than doing a burnout. Onces the wheels are spinning (burnout) there is much less force going through the diff.

At high speed like that you would be making peak power and the wheels would be gripping, so the driveline would be under maximum pressure.

Also, as mentioned, you had the cheaper eaton centre. To be honest if you built a 425rwkw/500rwkw engine then skimped out on the diff (to save a few dollars) then you deserve to have it break. You knew what the limit of the eaton unit was, dont bitch that it broke when you went waaaay over the maximum specified power.

To the OP, the Harrop Trutrac is rated to 500rwkw. Unless your pushing more than that (doesn't sound like it) then its a good investment.


Running 825rwkw you are REALLY pushing that Tru Trac to its limits dude! :confused:

Just shows how well the Harrop one is made compared to the cheaper Eaton unit.

There are many similar stories around of guys running 600rwkw+ on harrop units without breaking them. In fact i havnt heard of a broken harrop trutrac (excluding the first production batch which had a design flaw).

[RATTLER]

I would expect them to break on a main straight like that rather than doing a burnout. Onces the wheels are spinning (burnout) there is much less force going through the diff.

At high speed like that you would be making peak power and the wheels would be gripping, so the driveline would be under maximum pressure.

Also, as mentioned, you had the cheaper eaton centre. To be honest if you built a 425rwkw/500rwkw engine then skimped out on the diff (to save a few dollars) then you deserve to have it break. You knew what the limit of the eaton unit was, dont bitch that it broke when you went waaaay over the maximum specified power.

To the OP, the Harrop Trutrac is rated to 500rwkw. Unless your pushing more than that (doesn't sound like it) then its a good investment.



Just shows how well the Harrop one is made compared to the cheaper Eaton unit.

There are many similar stories around of guys running 600rwkw+ on harrop units without breaking them. In fact i havnt heard of a broken harrop trutrac (excluding the first production batch which had a design flaw).

Hey mate,

Not bitching at all as was steered to the Eaton by my mechanic! Just saying if you're pushing high HP then probably not the right one to go for but I think Dave (Blown540) is very lucky thus far to not have his blow running 825rwkw!!

Scotty

[Evman]

I don't think he was bitching at all :confused: Fair call he was running more power than it was rated for but there are a lot of people on here doing the same with the Eaton and saying it's fine. As it so happens, they can break with less power than others have.

[Blown 540]

Yes mate, did that to but 1st was the Eaton Tru Trac, then bought the 9" (with a supposid Locker in it) and ended up being a standard LSD!

The lesson learnt from that was never buy anything "2nd hand"!!

Running 825rwkw you are REALLY pushing that Tru Trac to its limits dude! :confused:

Roger that, so i was worried about my housing doing the same for nothing lol.


To the op
Wasnt trying to start a shit fight about tru trac,just pointing out how strong the harrops are in my humble opinion,you wont be sorry if you get one, two even black lines ftw.

[duke5700]

I'm going to use my tru-trac for street duties and a 33 spline spool setup for the drags.

[vxss5.7]

at end of the day my car not going to b no power house weapon just cruise/everyday car with mayb tops 280rwkw if i cam it soo im sure i wont have to worry about breaking it

[Kingston_99]

next on my list of things to do.
trutrac and Harrop diff cover.

[hRTHSV]

I have the Harrop version which i am more than happy with and just ordered the Eaton version for my road registered track car so it'll be interesting to see how it goes.

[Jamesls1]

ive got a new trutrak with harrop cover for sale 3.4 gears all new
pm if interested

[vxss5.7]

i put the tru trac in with the diff gears 3.7 n its best thing eva done realy realy happy with it!

[Toast]

How an LSD should be! I got an Eaton in my ute, great thing :bow:

Interesting comments between the Eaton and Harrop brands. Cheers.

[chevypower]

I was talking to a guy at a company called Just Differentials in Washington, and he recommended the Auburn LSD over the Truetrac, for my Ford 9.75'' axle. He sells both, so not sure if any of you have tried an Auburn. Sick of the single spinner though.

[blu ute]

I am watching with interest. I will go down the trutrac road but not sure which one. Some interesting info. :goodjob:

[APCLB]

ive got a new trutrak with harrop cover for sale 3.4 gears all new
pm if interested

Pm sent........

[Smitz SS]

Would you guys recommend this as a good mod for a slightly modded 6.0L?

[IJ.]

Would you guys recommend this as a good mod for a slightly modded 6.0L?

It's a "good mod" for every car ever made modded or not, they're a great diff with none of the downsides of a traditional LSD, i.e. no trailing throttle understeer, and they don't work for 6 months then wear out and go peg leg.

[etrocket]

can someone explain the difference on the road between the standard diff (lsd) and a trutrak. Is there more grip?

[SirNemesis]

can someone explain the difference on the road between the standard diff (lsd) and a trutrak. Is there more grip?

That is the intention, but 'on the road' it wouldn't be an issue, as the slightest loss of traction is a crime worse than murder.

I find it awesome. It might be placebo but it feels easier to turn into a corner hard off throttle with it. My theory is the factory limited slip diff provides a little restriction motivating the car to keep going straight, but the Truetrac pretty well free-wheels off throttle.