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Crap brand and/or bald front tyres causing your car to understeer in the wet.

With the wheel spin your diff is probably loosening up from old age.

thanks for that

well my front tyres are new with around 90% tread on it

they must be shit than lol

well i own a 1993 r33 with 180 000kms

but in the dry it spins both wheels

thats what i dont understand??

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you have a viscouse lsd (sorry for the miss spell) means it wont allways catch lsd. so in the wet its too easy for it to brake traction and doesnt need to spin both. though like hamish said it is probably a bit worn (wear will make it looser and wont catch as oftern)

to fix this you could shim the diff which will make the diff tighter, just dont shim it too far or the diff will be locked. you can buy the shims from nissan for about 5 dollers each, you probably will only need one .8mm one. by memery it will take about 2mm to lock it. its not difficalt to do just a bit of work there should be something in the DIY section telling you how to do it.

panda

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What brand tyres do you have on the front? Also is the wheel allignment to spec? Because that can also affect understeer/grip. Another factor could be that you have wider tyres on the rear and skinnier tyres on the front causing the rear to force the front to understeer by the rear having more grip.

On the diff, I agree that you should shim it to tighten it up. The viscous lsd's do tend to single spin once they have loosened up over time.

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i dont think its undrsteer because the front wheels dont grip at all and slide when its wet when i turn hard

it the dry it grips and handles really good

either you've got ordinary tyres or the road surface is very slick and there just isn't much grip when it's wet. I have RE001's and sometimes find the wet grip to be pretty borderline, I was expecting more from Bridgestone's "premium" tyre. However road surface makes a huge difference, old polished bitumen has low grip while rough bitumen still grips well in the wet.

Rear diff choice does affect off-throttle handling, my R31 had a locked diff and would understeer badly into corners if I went in a bit hot. Any car with a 2-way would be similar but not nearly as bad. Standard viscous LSD will have no effect off throttle, they aren't exactly a tight diff.

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