FS: Limited Slip Differential for 131

[131rally]

Im planning to order Limited Slip Differentials straight from factory for Mk1/Mk2 Fiat 131. The parts are made by professional differential factory which make race car parts, a special order for me, not available normally.  Price 750? + VAT 24%.

If there are enough people who are interested I will make the order.  PM or e-mail to marko1vaisanen(atatatat)gmail.com

[sid131]

Hi marko are they 2 way ?

[hondacrf450]

Will they fit a 1981 Sport ?

[131rally]

Sid, 2 way?    Disc type, like ZF. Though, if people want, they can be Torsen type too. Torsen is somehow even better. It will adjust the power to the tire having more grip. Though, if the other is completelly in the air it dont have torque enough to do a thing...

If Im correct there are two different differentials in 131. Early version (Mk1-Mk2 cars?) 22 splines in halfshaft. The Mk3 had 24 splines and this wont fit them. BUT, only way to be sure is to take one half shaft from the car and calculate the splines.

If there are interested enough for 24 spline version, it can most propably be done too.

[longhamrob]

I would have one straight away BUT after buying TWO wrong ones and losing loads of money i am a bit dubious. There was a thread on this subject a year or so ago.
 Unfortunatly despite many members efforts it could not be confirmed exactly how many 'standard' differentials were in the 131 racing/sport but there is at least TWO. Both of my RHD 131r's were different from what is available out there and after taking the axle out and dismantling it for nothing you can understand how pleased i was.
Probably best to get exact measurements of your existing diff first which will mean taking the axle out and dismantling it.
 Setting an axle up is a skilled job and is one of the few things that even the Haynes manual will not cover.

[131rally]

Yep, I know there are atleast two. 22spline and 24spline. All cars Ive had were 22 spline versions. So, I will order those first. If interest is great enough, I will order the other too.

I will hunt down the Fiat instructions for adjusting the rear axle. I have 131 Abarth instructions allready.

[TOAD]

Try this,

http://www.youtube.com/watch?v=0DQPJpJ7xvU

And a Torsen does not work when one wheel has 0 grip,   wheel in air,  ice maybe.   Only any good when both wheels are on the ground. 

   

[131rally]

I have done my share of rear axles  But if somebody wants to buy a LSD unit, then I will try to send instructions with it.