16 replies to this topic

[dron]

Got one in a 31 spline 9" behind a 355 in the uc. only about 3000km but so far so good.

[Ice]

Speedmaster is Procomp
Go the Harrop

[yel327]

I have heard some stuff is OK, have heard the alloy heads are OK as long as you throw away the valves and springs. My problem with some of this is the adage you get what you pay for always rings true, and using cheap stuff is like playing Russian roulette. You can buy an Eaton Trutrac on EBay delivered for under $900, Speedmaster one is about $600. $300 is cheap Insurance when you are spending $2500+ on a diff.

[dattoman]

G'day all

 

Just wanted to see if anyone has had experience with the truetrac made by Speedmaster? Spoke to a diff shop today in melbourne who uses them and claimed they were a cheaper and potentially better choice over the Harrop (Eaton) supplied ones? Any truth to this?

 

Diff shop said they can supply the Harrop ones, at a higher cost obviously, but was insistent that the Speedmaster one was up to the task.

 

Just trying to stay away from junk if I'm going to be spending $$$$ on a diff and then get a dodgy LSD in it that needs to be swapped.

 

Any first hand experience appreciated!

 

Whats the actual diff you're using ?

[tsn007]

i actually worked there for a month, and can say that the Speedmaster Torque worm LSD's are quite good and pricing at trade level was quite reasonable and good profit could be made

 

the centres are assembled in house by a very reputable and experience diff builder

 

Also, there are some big very well known shops buying heaps of these centres and selling to the public 

[tsn007]

 Smeaton Grange NSW

 

https://www.atracingworld.com.au/

 

made in China

 

centres are assembled inhouse

[ozyozyozy]

A number of the harrop truetracs are not off the shelf eatons, they have been tweeked and played with to make them better than the standard ones, thats the pro

The con, pain to deal with company. Know they had big issues with stock recently, dont know if it extended to bw diff parts.
What they tell you for time availability and what they supply are 2 very different things.

[ls2lxhatch]

If you are considering a BW78 then have a look at the KAAZ.

[dattoman]

If you are considering a BW78 then have a look at the KAAZ.

 

 

Do they do a 31 spline ?

Thought only Harrop did

[ls2lxhatch]

Do they do a 31 spline ?

Thought only Harrop did

 

I am not aware of a 31 spline version of the KAAZ. 

 

If I had to choose between a 31 spline Torsen/Truetrac and a 28 spline KAAZ I would take the KAAZ.

 

The KAAZ will lock and supply equal power to both wheels. The Torsen does not lock, the Torsen typically has a 2.5:1 torque bias (roughly 70/30). This means around 70% of the torque is delivered to the wheel with the most traction.

[skap]

How did you go with this one 74LH?

 

I am needing a centre and gears for a BW M78, 28 spline.

 

does not appear to be any Eaton in stock,all back order.

 

my diff guy actually recommended the Speedmaster (which brought me to this thread)... but putting anything procomp in a car, all be it a dirty VN, just doesn't sit well with me...

 

the Kaaz sounds good, but very pricey around $1,600.

 

Must say, i would go the 9" if I could start again... I thought the BW was going to be a much cheaper alternative. 

[dattoman]

VN should be an M75

Regardless the centres fit

 

Try Motospecs

They also distribute the Eatons

[skap]

Thanks Neil.

Ended up finding an Eaton this evening, so went with it.

[Statler]

My diff guy warned me about the Chinese Trutraks. 

Matter of fact he was changing yet another broken one out when i went to ask him about them. 

 

I bought a Eaton on his recommendation.