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Old 07-07-2016, 12:49 PM   #1
GTO44
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Wavetrac vs Kaaz vs Truetrac

There's been a lot of talk lately about different rear end setups. No one has been talking about the Kaaz unit. Looks like it's the same price as the Wavetrac.

Is the Kaaz old tech compared to the wavetrac? Will the Truetrac hold up to these 2 with DD, light drag racing, an occasional road track day?

It was brought to my attention the Truetrac won't hold up to a lot of drag racing. Anyone else experience failures?

Looks like Kaaz is more for a road racing setup?

It has also been brought to my attention recently that the G-force Major Rebuild kits aren't the best and I should get a major rebuild kit from the banned one... Anyone have problems with their G-force Major Rebuild kit?

Would love to hear from peeps that have experience with these setups.

Thanks! Let's discuss.
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Old 07-07-2016, 01:30 PM   #2
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'scribed since I purchased a Wavetrac which hasn't arrived yet. Originally was just going to use the stock unit then researched the TruTrac but opted to pony up for WaveTrac on a significant July 4th sale.
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Old 07-07-2016, 01:52 PM   #3
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Wavetrac and TruTrac are torsen type (gear operated) differentials, with the Wavetrac being far superior. The Kaaz is an excellent clutch type unit that requires special attention to the oil used, and needs to be properly broken in and periodically rebuilt, as the clutches are wear items.
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Old 07-07-2016, 02:39 PM   #4
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I have No problem with my GForce1320 rebuild kit!!
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Old 07-07-2016, 03:44 PM   #5
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Quote:
Originally Posted by Lakegoat...View Post
I have No problem with my GForce1320 rebuild kit!!

That you know of. . .
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Old 07-07-2016, 04:43 PM   #6
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Contact the banned one with these questions.
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Old 07-07-2016, 08:29 PM   #7
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My concern is with stub retention in the Wavetrac. DSS was investigating but I have not heard of any solutions yet.
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Old 07-08-2016, 11:51 AM   #8
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Quote:
Originally Posted by mistermike...View Post
Wavetrac and TruTrac are torsen type (gear operated) differentials, with the Wavetrac being far superior. The Kaaz is an excellent clutch type unit that requires special attention to the oil used, and needs to be properly broken in and periodically rebuilt, as the clutches are wear items.

Thanks for the info mistermike! Makes sense now
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Old 07-08-2016, 11:54 AM   #9
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Quote:
Originally Posted by Lakegoat...View Post
I have No problem with my GForce1320 rebuild kit!!

That's good to know. How long have you had it rebuilt for and how much was the labor on that installation or did you do it yourself?
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Old 07-08-2016, 11:55 AM   #10
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I haven't taken the Trutrac to the track, but it has been fine for street driving.
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Old 07-08-2016, 11:58 AM   #11
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Quote:
Originally Posted by MuhThugga...View Post
I haven't taken the Trutrac to the track, but it has been fine for street driving.

Nice, how long have you had it in for? Did you do a major rebuild kit when it was installed?
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Old 07-08-2016, 05:48 PM   #12
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I have been beating on my TruTrac with 3.91s for about 5 years now. Only concern is that the inner stubs fit a little more loosely than I would prefer hit it hasn't caused any problems
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Old 07-08-2016, 06:50 PM   #13
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Quote:
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Nice, how long have you had it in for? Did you do a major rebuild kit when it was installed?

I've had it in for three years now. I believe only the side adjuster bearings were replaced.
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Old 06-04-2019, 03:48 AM   #14
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Reviving this thread because I'm about to rebuild my diff. Going from 3.46 to 3.91's. Have consulted with a few experts but looking now for the real world experience of DD users and abusers.

Currently at 400RWHP in a M6 application. May or may not go to 550 RWHP in the future with a Procharger

Which LS unit: Wavetrac vs. Truetrac vs. Kaaz vs. rebuilt OEM

Which stubs: Gforce vs. DSS vs. Stock

Which gears: OEM (expensive) vs. Motive (cheaper but potentially noisy)

Upgraded side adjusters?

All input appreciated.
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Old 06-04-2019, 03:57 AM   #15
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As you can see from my sig, I have the Kaaz. Car is used for DD, some road rally, but mostly for road course track days. I have always used their oil and the unit has been rebuilt once in 10 years. Very durable.
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Old 06-04-2019, 07:56 AM   #16
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If you put a procharger on it, you dont want 3.91's. You'll end up running out of gear before the 1/4 and find yourself having to shift into 5th. You'll be limted to 135mph at 7000rpm.
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Old 06-04-2019, 10:57 AM   #17
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Quote:
Originally Posted by sandu002...View Post
As you can see from my sig, I have the Kaaz. Car is used for DD, some road rally, but mostly for road course track days. I have always used their oil and the unit has been rebuilt once in 10 years. Very durable.

Any issues with loose fitting inner stubs......not mentioning any brand names.....
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Old 06-04-2019, 11:03 AM   #18
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Quote:
Originally Posted by Kfxguy...View Post
If you put a procharger on it, you dont want 3.91's. You'll end up running out of gear before the 1/4 and find yourself having to shift into 5th. You'll be limted to 135mph at 7000rpm.

Agreed, my local track is 1/8 mile, so assuming 550 HP as my end goal I calculate I'll still be well under 6500 in 4th gear after 660 feet.
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Old 06-04-2019, 12:02 PM   #19
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Anyone know of gears lower than the stock 3:46? I'm looking for 3:08 or near that.
I know that people have done this in the past but I don't know who, where or what they came from.
Any help is appreciated!

I will say that Kaaz make a steller product and have more than proven themselves in the Import world. I know others have used it with great success as it was one of, if not the first unit available for our cars.
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Old 06-04-2019, 12:15 PM   #20
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I have 3.08 im my diff and if i remember correct they were a stock australian gear
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Old 06-04-2019, 03:32 PM   #21
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As I understand it you can at least get Aussie OEM gears for 3.08, 3.31, 3.46, 3.70 and 3.91.
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Old 06-04-2019, 03:35 PM   #22
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Just ordered the Kaaz 1.5 with the Quiet option direct from them. They have a 5% sale going on with free shipping. Believe it or not I prefer the clutch type LSD and this one is a significant upgrade from the OEM. Now I just need to decide on the gear source and stub shaft source.
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Old 06-05-2019, 03:28 AM   #23
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Quote:
Originally Posted by lejambcr...View Post
Any issues with loose fitting inner stubs......not mentioning any brand names.....

None. It takes a licking and keeps on ticking.
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Old 06-05-2019, 06:27 AM   #24
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I put in dss stubs, gforce axles, 3.70 motive gears, and a trutrac only about a year ago but its night and day difference vs stock. Night and day difference vs stock, lockup is instant and crisp, has zero added noise over stock,
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Old 06-05-2019, 08:58 AM   #25
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Thanks Guys!

Do any of you know where I can locate these? It sounds like they come from another vehicle there? But I don't know where to start.

Any help would be extremely appreciated!
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Old 06-05-2019, 09:13 AM   #26
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My stock diff with 4.10 and GForce rebuild kit lasted 7 years. No issues, until I broke something inside this year. 6 speed with lots of drag strip time.
450 rwhp. 400 rwtq. I bought a truetrak this time. But, nothing is put together yet.
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Old 06-05-2019, 12:15 PM   #27
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Quote:
Originally Posted by blwnls1...View Post
Thanks Guys!

Do any of you know where I can locate these? It sounds like they come from another vehicle there? But I don't know where to start.

Any help would be extremely appreciated!

The 'banned one' can get them.
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Old 06-05-2019, 12:32 PM   #28
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Quote:
Originally Posted by lejambcr...View Post
Just ordered the Kaaz 1.5 with the Quiet option direct from them. They have a 5% sale going on with free shipping. Believe it or not I prefer the clutch type LSD and this one is a significant upgrade from the OEM. Now I just need to decide on the gear source and stub shaft source.

what are the pluses and minuses for the two types, that you prefer the clutch type?
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Old 06-05-2019, 12:47 PM   #29
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I think I'm basically 'old school' on some things. This being one of them. Since this build is my swap-able 3.91 setup I will probably try either the wavetrac or truetrac when I rebuild my current 3.46 setup. Then I will be able to compare.
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Old 06-05-2019, 04:20 PM   #30
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Quote:
Originally Posted by lejambcr...View Post
I think I'm basically 'old school' on some things. This being one of them. Since this build is my swap-able 3.91 setup I will probably try either the wavetrac or truetrac when I rebuild my current 3.46 setup. Then I will be able to compare.

got it, interesting. I look forward to reading your thoughts at that point in time,
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