Daz_WRX

Is the standard P1 rear diff a limited slip unit? if so how do you test to see if the diff is a limited slip or an open diff.

Thank you

911

Not too sure. but i think the P1 is a viscous type.

GroupNGC8

iTrader: (1)

it was limited slip no need to test! the front diff was the open type. final drive ratio was 4.444

ScuuBdoo

to test for LSD...

put car on a lift
rotate wheels by hand
if they rotate in opposite directions then it has LSD.

Im not 100% sure on this method.

silent running

Yeah I thought this, but wasn't sure about it. Every car I've had recently has done this, but surely not every car I drive has an LSD? Or maybe it does?

wrxpablos

You should feel resistance when you turn if its an LSD. Open diffs rotate in opposite directions LSD go the same way but im unsure if this method works on 4WD but does on 2

merlin24

iTrader: (1)

Viscous without a doubt

silent running

So if the wheels go in opposite directions that just shows it's got a diff? Just not a limited slip diff.

Daz_WRX

Brilliant, could someone please explain what a Viscous LTD Slip diff is. What kind of diff is this.



This is my old diff, would allow both wheels to spin and be very tail happy in the rain. However my new diff wont allow both wheels to spin.... why could this be?

Any advice appreciated

merlin24

iTrader: (1)

Lifted from the 2004 Workshop manual

Daz_WRX

Cheers Merlin, made sence. So a viscous ltd slip diff, with both wheels off the ground, spinning one wheel should in turn rotate the other in the same direction?

Thanks