Shortening Drive shaft

[30psi]

Yeah it will be the difference between the complete S13 shaft bolted to the CV housing compared to the S12 one.

I'd say 2" or thereabouts.

Why do you want to do it this way. Your making it harder for yourself. Getting reliably shortened shafts is very expensive. In fact when i enquired they wanted £100 plus VAT per shaft but actually said they can't predict how strong they'd be after. They then recommended getting custom shafts at £300 plus VAT per side, at which point I hung up.

[JackieFan]

Mainly because I can't see how you modified the S12 shaft to work in the S13 vLSD. When I compared the two output shafts on the bench they are totally different. How long are the splines that the Spider joints fit over on the end of the shaft?

[30psi]

You only need to shorten the passenger side shaft by about 5mm, then deepen the existing groove and it will look just like the passenger side S13 unit.

Then use another passenger shaft because its short but strip the CV joint off of it and fit the S13 one to it. The spider assemblies and splines inside the CV joint exactly match.

Don't go getting custom shafts it will work out too expensive. Might as well buy a proper mech diff for the same money

[JackieFan]

I took photos of the output shafts next to each other so I'll have to dig them out and nose again. I've got all the bit's to do it the way you did it's just that when I looked at the shafts they seemed so different that I didn't even start messing with them.


When the driveshaft is stripped down is there still splines visable after the spider joints?

[30psi]

Shouldn't be splines visible after the spider assembly, maybe only a small amount. What version shafts are you using? ie mk1 or mk2?

[JackieFan]

Shame, I was just trying to think of smart ass ways of shortening the actual drive shaft without chopping it down the middle. Need to get it sorted for JAE!!

[s13eater]

feck me if i can do them, then i'am sure you can mate ,i think i shortend mine by 8mm and same as mart says, just swap the end off of the s13 shaft onto the s12 shaft, its so you have a flanged end on the s12 shaft.