LSD in real life, user expriences...

Starlet_Sam

Moderator, Regional Area Reps Supervisor & Gay Car
whys this then mate?

Helical diffs require both wheels to have at least some grip, if one wheel has no grip such as on ice, snow or if it's off the ground then it acts like an open diff whereas a mechanical one always works the same by using clutch plates to essentially turn the 2 drive shafts into a solid shaft. The helical ones utilise a method of torque transfer which sends the torque to the wheel with most grip, but never actually "locking" the shafts together. Most modern diffs from the factory are helical due to them being user friendly, quiet, and won't wear out. Mechanical ones will wear eventually and act like an open diff until it's rebuilt, which is why OEM ones eventually become fit only for the bin.
 
Helical diffs require both wheels to have at least some grip, if one wheel has no grip such as on ice, snow or if it's off the ground then it acts like an open diff whereas a mechanical one always works the same by using clutch plates to essentially turn the 2 drive shafts into a solid shaft. The helical ones utilise a method of torque transfer which sends the torque to the wheel with most grip, but never actually "locking" the shafts together. Most modern diffs from the factory are helical due to them being user friendly, quiet, and won't wear out. Mechanical ones will wear eventually and act like an open diff until it's rebuilt, which is why OEM ones eventually become fit only for the bin.

Thanks for the explanation Sam, I was unsure why the were crap in slippery conditions, you cleared it up nicely. riko666 explained it to me recently but im slow and had forgotten :haha:
 

Paul_JJ

Member +
Having so many LSD experts around here, I would like to ask a question if my car has an LSD or not!

I've put my Glanza in Neutral, if I spin a wheel backwards (like if it was in Reverse) they both spin in the SAME direction, both at the same time! But If I spin them forward, the other wheel doesn't spin at all. So do I have an LSD or NOT???

I do not experience a lot of wheelspin in Snow, I remember my old Starlet and it was horrible in snow, the Glanza is so much better in winter conditions!

Thank you!
 

Rory

Lifer
Quaiffe is the dogs bollocks.

Ive run a Cusco before hand, was pretty hardcore, clunking and banging everywhere. did work nice with alot of loud pedal.

I switched to the quaiffe and its so much better, you dont even know you have it in there until you need it. No noises, no clunks etc.
Do remember though, it will act like an open diff if you left a wheel. ;)
 

TheStarletGT

Member +
I have a Cusco MZ 1.5 way LSD. This is the first car i ever had that has a LSD, so im learning what they do.

When doing sharp turns from a stand still, like when turning right, the driverside tyre wheelspin, i dont know why, but it does. Even at very gentle take off, it wheelspins and bounces the wheels at the same time. All i know is that my clutch aint a standard type.

Burnout wise, forget even trying. I tried, and it would grip like a sommbich. Its pointless. You will get a chirp and its all over.
 

sx_turbo

Lifer
mechanical diffs dont clunk if u bed them in right and use the right oil, mines virtually silent.

downside is they do need rebuilding.

they are awsome bits of kit and i dont think i would go without again
 

churcherj

Member +
i like the sound of the trd mechanical diffs now, how often do they need rebuilding? isit a case of how hard its driven, meaning greater track use will wear it out quicker, or isit a case of mileage? how would people say they compare to the helicals in terms of performance?
 
i like the sound of the trd mechanical diffs now, how often do they need rebuilding? isit a case of how hard its driven, meaning greater track use will wear it out quicker, or isit a case of mileage? how would people say they compare to the helicals in terms of performance?

I have a 2way TRD mechanical LSD thats been rebuilt with stronger plates which I may be fitting to my car :haha:. I may be getting a gearbox with OEM LSD and a 4.3 final drive so i'll see how that works out before I make any decisions. I know its going to be very tricky to drive with but it should make me a better driver. I should be VERY interesting if I do :p:p
 

sx_turbo

Lifer
i believe the trd diffs can be sent to kaaz to be rebuilt,

as for when they should be rebuilt i have no idea, i have heard through the grapevine that roughly 20,000km, but it all depend on how its driven etc
 
i believe the trd diffs can be sent to kaaz to be rebuilt,

as for when they should be rebuilt i have no idea, i have heard through the grapevine that roughly 20,000km, but it all depend on how its driven etc

I have heard that KAAZ make the TRD LSD's so what you say sounds VERY plausible.
 

HutchGlanzaV

Member +
20,000 kms is pretty frequent, how much would it cost to get it rebuilt? That sounds like a proper ball ache to be fair. Ok if your car is track only but on a daily driver your gonna be rebuilding the diff once a year!
 
I had a TRD 1.5 way mechanical LSD in my car when it came in from Japan ad there was 44k kilometers on it. It was still in my car up until i had to sell most of the parts off it at 83K kilometers and it was still perfect
 

Philip0694

Member +
I have just been offered a KAAZ LSD cheap and its brand new, would any of you recommend KAAZ and would it be okay in this bad weather?
 

azerty

Supermoderator
does anyone would have an TRD mecanical LSD open view ?
there are few things I would like to check and think :)
(I have one fitted in my car which I have already opened, but I don't remember all of it)
 

hardcoreep

Member +
Switch from a clutch type, and a viscous type to a helical and no problems. For reference both helical and clutch plate types are under the "Mechanical" banner.
 
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