TRD LSD functionality?

[o_man_ra23]

Anyone know much about the TRD AE86 LSD's?? I can sort out a secondhand TRD LSD, new rebuild kit, and have it posted here for around the $650-700 mark. From what I can tell they are a 2 way which I am slightly dubious about putting my wife behind the wheel of a car with a 2-way LSD. A new Cusco LSD will cost at least $950 plus freight, but is a 1.5way with a predictable and cushioned grab, so I know it will be fine for everyday work.

What can anyone who has used a TRD AE86 LSD (Zenki in case there is a difference in design other than the axle size) tell me about them? Shortening axles isn't an issue and can be done at pretty much zero cost. If anyone has compared both a good nick TRD unit and a Cusco item (RS series), I would be interested to hear if they had any difference in practical operation.

[HIZOKU]

I don't have a ae86 but i do have a Jzx81 with a TRD 2 way and i had no issues with street driving or getting in and out of parking spots. dont know what else to tell you other then i love it works well but i have not used any other brand name 1.5way or 2 way

[o_man_ra23]

How does it go if you are turning onto an on ramp, or roundabout at reasonable throttle, and suddenly have to lift off the throttle to brake/slow down for a change in traffic (ie somebody just jumped lanes into the spot you were going to take)?? Locking hard in a situation like that would send the tail sideways, and for a casual driver like my wife, would give her a fright and see her lose control. If its not going to lock hard on decel (say from mid rpm, she doesn't know what a redline is really for), then I'll go with the Cusco. But if it just gets a little twitchy without locking, it should be fine.

[oldcorollas]

TRD ones have different angle ramps as options

for example
58/20deg 1.5 way http://page.auctions.yahoo.co.jp/jp/auction/145967429
58/58deg 2 way http://page2.auctions.yahoo.co.jp/jp/auction/b112971523
65/65deg 2 way (higher lockign force) http://page10.auctions.yahoo.co.jp/jp/auction/m77567150

there are also MZ and RS cusco's

there was something abotu the KAAZ(??) having larger diameter plates, or more plates or something, which would be lower wear (or was that cusco?)
cusco also have "multi cam" centres, so it is easy to change from say a 1 way to a 1.5 or 2 way, without buying new parts.

as for 2 way on the road, unless she is trying to do compression lockups, the engine braking force (and resulting decel locking effect) should be a lot lower than when accelerating.
but if she is clutch kicking, then it will lock easier..

yahoo search http://auctions.search.yahoo.co.jp/s...erce&ei=euc-jp

edit: it also depends ont he preload.. MZ cusco has preload wound springs, but RS and TRD has the cups?
high preload will have you squeaking around corners, low preload will not.

[HIZOKU]

How does it go if you are turning onto an on ramp, or roundabout at reasonable throttle, and suddenly have to lift off the throttle to brake/slow down for a change in traffic (ie somebody just jumped lanes into the spot you were going to take)?? Locking hard in a situation like that would send the tail sideways, and for a casual driver like my wife, would give her a fright and see her lose control. If its not going to lock hard on decel (say from mid rpm, she doesn't know what a redline is really for), then I'll go with the Cusco. But if it just gets a little twitchy without locking, it should be fine.

Well this is hard to answer as car setup will prob come down to it to, but turning into a ramp or round about no issue at all, the car turns just like normal dont even get axle tramp/skipping when doing sharp turns i could go around a round about (that was hard to type) like do laps with out the ass kicking out before boost kicked in same with on ramps or if i kept throttle steady. as for de acceleration i never had a issue with it locking up even when grip racing and to put it to the test i was on the tail of a C63 AMG merc with all traction control on and everything so was a good test. but yeah my car is set up for drifting and never had a issue with it locking up under de accel other then when i rip the handbrake.

having been in cars with welded diffs kaaz diffs and so on and friends been in my car they seem to say my one is very smooth not harsh at all.

but in saying that i guess it comes down to the driver and how they drive. hope that helps

[aussierider]

I only have experiences with a 2way cusco in my ae71, but its also setup really tight(skips when parking).
But even then it only sustains a loss of traction on deacleration(already sliding but on and off the throttle), not causes a loss of tractions on deacleration, sorry if that doesnt make sense but I'm not very atriculate.

Even with it really tight I dont find it a hassle, it's preditable because I know the car has a tendancy to oversteer.

[o_man_ra23]

TRD ones have different angle ramps as options

Is there a way from the outside (ie not stripped) to tell what version it is? There is one which is claiming to be a 2-way, however there is no indication as to which it actually is.

The RS has spring loading to prevent sudden grabbing of the clutchpacks, whereas the MZ is the more race oriented Cusco centre where there is no spring loading.

Kaaz advertise as having larger plates, however are a bit dearer than Cusco and are only available as 2 way.

Sounds like under fairly moderate driving conditions I shouldn't have a problem with lockup (I guess we would have to see what happens in the rain, but I don't think this car will be driven by the wife on wet days due to SPA (sudden pothole appearance) which is symptomatic of the Mackay region. I'm not worried about lockups while I'm driving... I can predict what the car will do when that happens and know how to get out of it. Just the wife is the concern, but it seems like if she doesn't drive in the rain, it should be all apples.

[71TA22]

Owen,

I have had both D and T series factory 2 way LSD's in my TA22. You dont really notice them unless you push the car hard. No noticeable lock up unless speed change really violent (on off throttle) - most people would brake before reaching this point.

[oldcorollas]

fwiw, one of the ppl i linked on yahoo (iirc) sells them at various pre-loads and will set up to your specs (via shim)
they are basically recoed units, and i bought a fair few.

[o_man_ra23]

Thanks for the info fellas. Sounds like they should be fine for my intended porpoises. That'll save me about $400...

[Hen]

People seem to make a huge fuss about the differences between 1, 1.5 and 2 way LSDs, but I think when putting around town (as in wife style driving) there is absolutely no way to tell the difference between them. I even doubt that a non-spirited driver would ever tell the difference between an open diff and an LSD. So I wouldn't hesitate to fit whatever diff you think is best.

Hen

[o_man_ra23]

I wasn't interested in performance differences... that department is for my driving style. I was merely interested in adverse condition effects, of which it seems they will be negligible for the design criteria.

[oldcorollas]

unless the preload is set too high...

[o_man_ra23]

Will keep an eye on that. If the car does exhibit signs of awkward maneuverability due to a twitchy diff, I'll be sure to strip it down and check shims.

[HIZOKU]

OH i should add my car i was to tired to drive home from the mountians so let a female friend drive it and she had no issues at all with the diff and she had never driven anything with performance at all