Rear diff options...real LSD's...

Lets talk clutches and everything drivetrain related

Postby Hotrodhendrix » Mon Aug 18, 2008 2:48 pm

Did you get the 2 or 1 way? How much did it total?
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Postby gtfour77 » Mon Aug 18, 2008 2:57 pm

It's a 1-way with the option of switching it to 2-way...it looks pretty simple and straight forward construction-wise so I am sure a hybrid adjustments are possible...
RHDJapan helped me quite a bit and gave me excellent service with very fast shipping. Total cost was a little under $1200 shipped with brand new toyota stub axles...direct replacement to an open diff, nothing else needed. Perfect fit!
I am going to play with the fluid viscosities a bit as I'd like it to be a little more aggresive. (it's new so it might need some time to break in to engage 100% even after the initial break in after installation)


If anyone has any recommendations on fluids please feel free to post. I heard synthetics are not recommended but I think it's only due to the noise...I am going to try Redline 80W-90 as Redline recommended it for this diff... Any info would be appreciated...
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Postby lumbercis » Mon Aug 18, 2008 11:36 pm

^Don't you need a torsen diff pumpkin to use this? Or are you saying it works with the ST185 open diff?

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Postby RedCelicaTRD » Mon Aug 18, 2008 11:56 pm

He got new stubs so he was able to use an open diff.
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Postby gtfour77 » Mon Aug 18, 2008 11:56 pm

lumbercis wrote:^Don't you need a torsen diff pumpkin to use this? Or are you saying it works with the ST185 open diff?
J.


Open pumpkin, gear set and such are the same whether it's open or torsen (same part numbers)... it's just he diff carrier assembly that's different... so the cusco unit will fit in either open or torsen pumpkin...
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Postby CMS-GT4 » Tue Aug 19, 2008 1:26 am

LSd halfshafts are different. Thats the difference.
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Postby gtfour77 » Tue Aug 19, 2008 12:06 pm

CMS-GT4 wrote:LSd halfshafts are different. Thats the difference.


Yes, good point. But if anyone is getting the cusco unit , it already comes with a brand new set of axle stubs...so really you don't need anything besides seals if they are old... :wink:
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Postby lumbercis » Tue Aug 19, 2008 3:13 pm

Hmm, what is the price difference between an ST205 Torsen setup with half shafts and just getting the Cusco unit?

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Postby CMS-GT4 » Tue Aug 19, 2008 3:14 pm

That would mean the cusco lsd would be an awesome buy. Both half shafts run ~300 from the dealer.
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Postby gtfour77 » Tue Aug 19, 2008 3:47 pm

Overall I wish I would have gone with Cusco in the first place instead of spending $500+ on a torsen that started going bad after the second autocross on it (had noise) and now is a paper weight... The cusco is fully rebuildable and heck of a lot more reliable, not to mention 1000% more effective and tunable with different fluids. And the fact that you can change it from 1 way to 2 way or from 1.5-Way to 2-Way (and anything in between with little bit of basic machining) makes it a really good choice...

All in all this is a must for an autocrosser if you can keep the front two wheels on the ground in turns that is...you want just a little tiny bit of lift in the rear which does not matter since the cusco unit still pulls the other wheel to get you out of a corner...
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Postby CMS-GT4 » Tue Aug 19, 2008 3:53 pm

I was always worried about inside rear lift with the torsen unit, since it becomes and open dif w/o both wheels on the ground. I got very little rear lift once I switched to the teins.
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92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Postby gtfour77 » Tue Aug 19, 2008 4:08 pm

I am soving inside rear lift with very stiff springs(both maina nd tenders) on the front which unfortunatelly doesn't help turn-in or breaking.... we need someone to make a bigger front bar.... :D


BTW the open/torsen diff WILL spin the inside rear even if it's touching ground with enough torque in a mid-sized sweeper...all it takes is a slight weight transfer to the front and it will spin the rear tire if you apply power early in the corner as is necessary in an AWD vehicle...so by the time you get past the apex you are at nighest cornering force (most weight transferedto the front) with maximum torque being transfered to the wheels (around 3200 to 4000 RPM corner/turbo dependant)...
Last edited by gtfour77 on Tue Aug 19, 2008 4:18 pm, edited 1 time in total.
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Postby CMS-GT4 » Tue Aug 19, 2008 4:17 pm

Whiteline will make you a custom bar. Front or rear. If you contact them, you can get a larger diameter sway bar custom made. It was fairly priced too. I was going to do it years ago for the rear.

What year is your alltrac. If its 90-91, you can find a 92-93 front bar which is larger.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Postby gtfour77 » Tue Aug 19, 2008 4:22 pm

CMS-GT4 wrote:Whiteline will make you a custom bar. Front or rear. If you contact them, you can get a larger diameter sway bar custom made. It was fairly priced too. I was going to do it years ago for the rear.

What year is your alltrac. If its 90-91, you can find a 92-93 front bar which is larger.


Really.... how much bigger is it? If so I can just order it through my TRD contingency for very decent price...hmmm.. thanks for the tip Josh! I remember some bars being 25mm and some 27mm...is that the difference?
Martin V.
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Postby gtfour77 » Tue Aug 19, 2008 4:30 pm

Ok here is an example of a stock rear diff....which torsen was doing virtually the same thing... :doh:

http://www.youtube.com/watch?v=S_W49etqwLo
Last edited by gtfour77 on Tue Aug 19, 2008 4:35 pm, edited 1 time in total.
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