Roadsport A LSD. Which type?

[ge2]

An LSD discussion on another forum has got me thinking about the one fitted to my 7, and I don't know what type it is.

 

I done a good search and couldn't find anything definitive.

 

I understand it was a factory fitted upgrade, can anyone help?

 

 

[Irrelevant]

IIRC, std Caterham LSDs are ZF or Suretrac. If you take a driveshaft out and look in, with a ZF you'll see a cross, with a Suretrac you won't (I think you might see one bar though, not sure ).

Angus did an informative article on his website about LSD identification - have a search there.

[Stuart Faulds]

It will be a Suretrac or ZF depending on age. As Adam says, the ZF has 2 crossed pins visible, while the Suretrac has none (the standard open diff has one pin). The AP acts like an open diff when it's jacked up too. There's also a good chance that it's stamped on the casing somewhere (AP or ZF) along with the ratio (3.92).

[ge2]

Hi Stuart,

 

You'll probably know, it's C7TFT

 

Graham

 

 

[New Cat]

My 3.92 ZF LSD came from a Roadsport A. I think most of them are ZF.

One thing to bare in mind is that in Roadsport A they are unmodified Ford Sierra diffs with rather inappropriate ramp angles for a Caterham. I sent mine to Phil @ R&R for modification, probably a good idea unless you wish to compete in Roadsport A.

 

 

 

1994 1.7 Supersprint De-dion X-Flow. Yellow with black cycle wings

[Stuart Faulds]

Aha, hi Graham. It's a ZF