Harrop Tru Track fitment by Hi Torque

[CalaisRider]

:D

:)

:D

Well as most know, I have buggered my second LSD and elected to go Harrop TrueTrac VE/G8GT 32 Spline for my third in 3 years, and hopefully get better longevity. Overview of the product below:

The Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket as an Eaton brand. It remains the leading helical gear-type limited slip differential in the industry. Detroit Truetrac's proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction recognized not only for its toughness, but its smooth and quiet operation as well.

Proven design and effective performance all make the Detroit Truetrac limited slip differential the ideal choice for a wide variety of vehicle applications. No maintenance - Just Traction.

Features
• Smooth Operation
• Performs Open Until Needed
• Fully Automatic Limited Slip
• No Special Lubrication Required
• No Special Run In Procedure Required
• Billet Steel Heat Treated Body and Caps

Forged Heat Treated Shot Peened Internal Gears


For those who are comparing the Harrop/Eaton and the Eaton True Trac Please understand that the 2 units are “not” the same

Harrop in Australia had been the pioneer in development of this unit and Eaton partnered with them and had supplied the internal components for this unit

Yes both the Eaton USA and the Harrop/Eaton units share similar internal components but they are 2 different differentials

The Harrop units are made of billet and are hand fitted, the Eaton units are the tried and true forged housing manufactured on production tooling

Harrop/Eaton units are hand built of the finest billet materials available hence the price differential between the 2 units

Also to be noted is that the Eaton unit has an advertised 500HP rating and the Harrop/Eaton Billet unit is at 500KW rating

Do the math and please make your choices accordingly

Regards
Eaton Performance Products

The True Trac does not require any special oil, or any friction modifier. Run whichever oil (brand/viscosity) you would prefer for gear & bearing life ... the OE-recommended is okay.

Almost every component in the Harrop designed (yes, Harrop designed) Commodore True Trac is manufactured here in Preston on some of the most sophisticated CNC machinery in the country.

[CalaisRider]

Well nothing goes perfectly to PLAN:

Through my motorsport stuff I have known my LSD was no longer working. Given this is the end of my 2nd LSD to date I mulled over and decided to go Harrop Tru Trac mechanical as being the 3rd lsd in 3 yers - hopefully better longevity going Tru Track....

All went well initially doing the change and fitting it up. But at days end despite replacing bearings it was obvious the main bearing was also kakked. The Palannery gear had completely snapped in two. On inspection of my old LSD it was obvious why almost everything was stuffed and some Lapping of the main 3.7 gears and crown still to be done to get it all sorted.


The below photos are reflective of what confonted me. Strange bit is that I was still running the strip, circuit, frequent skidpan days and motorkkana as I didn't realise anything major was wrong - the diff was quiet as a lamb and no undue noise whatsoever.

There is a price to pay for continually playing hard. Oh well, my fault, no-one to blame but me. Kent at Hi Torque is looking after the fixing side and doing an awesomme job of customer service and satisfaction. I am running on a borrowed diff atm. The Harrop Tru Track will be all set and running next week sometime.

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5045.jpg

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5046.jpg

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http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5042.jpg

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5043.jpg

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5050.jpg

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5051.jpg

http://i186.photobucket.com/albums/x5/CalaisRider/IMG_5052.jpg



THE BELLOW VIDEO IS PROBABLY SOME SMALL PART OF WHY I BREAK THINGS - BUT IT'S OH SO MUCH FUN!!! . Skidpan and Circuit is even better!!


http://i186.photobucket.com/albums/x5/CalaisRider/th_Copycamera381.jpg (http://s186.photobucket.com/albums/x5/CalaisRider/?action=view&current=Copycamera381.flv)



Regards

Pete

[VS_Pete]

hehe You mad bastard but yes good fun lol

[Darren]

the truetrac sounds like the way to go Pete.
Sounds like it overcomes a lot of the weaknesses of a conventional LSD

[CalaisRider]

:)

Yup the way its going should be interesting.

1) I have to get the car down to HT when the diff is ready, also get some tune tweaks done this week sometime.

2) Then on Friday/Saturday I have an overnighter fishing trip, snorkel and spearfish, come pissup, come tall yarns and bags of prawns on tap with a bunch of very close mates and an awesomme setup 65 foot boat that Damo has - hell the thing is even air conditioned and a 600 litre full powered freezer on tap...

3) Then saturday evening I will be running Willowbank T&T to see what the luxo can throw up. Busy times for an old fart.

4) Sunday will probably see me smashing the begeesus out of a few golf balls for therapy as it's cheap as chips and great fun!

Cars are great; but diversity is even better...

Live for the moment - you could be dead tomorra!! ;)

Pete

[PROPSI]

i love a car that has been driven;)

Especially hard as the Luxo!!!!!!!!!

Nice work on the gears mate.:eek:


see you on Saturday.

[CalaisRider]

hehe You mad bastard but yes good fun lol


;)

Come join me Pete, you may become adicted too ( at least the video was only a very short circuit/loop of the plethora of routes that are part of Motorkhana). Ya never know if ya don't have a go!!!

Motorsport is only what you make of it, burning rubber is "not" the quickest way to complete any circuit. Slow and steady usually wins the race...

:)

[CalaisRider]

.
.

Well all went well at the fitup of the Tru Trac yesterday. I have gone Mainlube for the oils just to add some some serious protection and insurance (not cheap, but is good stuff). ;)

The diff is quiet as a mouse, even when the LSD locks in and unlocks you can't hear it at all. But it does lock in tight though; doing a U Turn is a whole new experience with this Trick Bit Of Kit. AWESOMME. I will let yas know what I find as the Calais hits the circuit, mountains, motorkhana, skidpan and stuff, but early indicators are fabulous and very promising for the future. I've done 300k on it to date.


Ash was able to attain 403 rwhp out of the Luxo on the day with power sapping auto trans in tow. Excellent result, that's way higher than others have been able to achieve with my car and cam. The best part is that it's oh so well mannered, streetable and driveable. Except for the slightest hint of cam lope and rock at the traffic lights you would be hard pressed to pick it from a ded set stock Calais V item. About 500hp and a tad more at the flywheel

Bloody awesomme job and I am oh so comfortable and happy with my car atm. - I haven't been this excited with the Calais for a hell of a long time. ;););)

Holy begeesus it does belt in hard with pedal to the floor though (not to twin turbo level but plenty for me). I was doing 100kph on the freeway this arvy (albeit a tad wet road), I pushed the throttle to the floor and it went balsistic and hurled "left" sideways at the rear - this was with the Tru Trac doing its bit to fully lock both rear wheels to equalise the power delivery to the road and some very good rubber mounted on the wheels. I repeated the excercise and yup same result - at that speed it would be at the low end range of THIRD gear. Thank gawd I wasn't doing 70-80 as thats where SECOND gear kicks down to. :eek:

I have realised that I need to re-learn how to drive the car as the way it is atm is just "that" much different to what it was.

Tis just a bugger that my Stainless sorst is oh so rooted atm. A new Mild Steel one will have to go in in 2010. Di Fillipo or Manta with 100 cpi cats comes to mind.

A sincere thank you to Kent and the Hi Torque Team; a job very well done.. The professionalism, customer focus, attention to detail, and aim to satisfy is beyond refute - fabulous imo.

Pete