FD Diff in a FC TII Rear End Questions

[Christopher W.]

After talking to Mazdatrix they don't have real experience with this swap. They did say I need the S4 stub axles. They said there are two different length haftshafts available but didn't have anymore information on that subject.

I am not sure about which stub axles, the short or long. I don't know if that depends on which haftshafts I get.

Should I first buy the haftshafts then determine which stub axles?

Does anyone know off hand if there are two different part numbers for S4 TII haftshafts. Or what the length measurements are for the short and long haftshafts.

In reference to hIGGI's statements above that means if I buy shorter haftshafts then I should get the longer stub axles or longer haftshafts and get shorter stub axles.

[hIGGI]

by looking at mazdatrix picture, u can simply assume that

S4 after VIN 608385 and ALL S5 TII halfshafts are longer :

Get these S5 TII longer halfshafts and then shorter S4 TII stub shafts (S4 after VIN 608385, part number shown in picture.

That should be ok.

We run FD torsen in about 10 FC's so far, its most affordable LSD for us...

Swap is pretty straightforward, set backslash and DONT forget to glue bolts to the ring gear (on one of our diffs they did break loose and it did not ended up good )

Here are some pics from swap :

http://rx7cz.net/photos/workshop56/

[Christopher W.]

Originally Posted by hIGGI

by looking at mazdatrix picture, u can simply assume that

S4 after VIN 608385 and ALL S5 TII halfshafts are longer :

Get these S5 TII longer halfshafts and then shorter S4 TII stub shafts (S4 after VIN 608385, part number shown in picture.

That should be ok.

We run FD torsen in about 10 FC's so far, its most affordable LSD for us...

Swap is pretty straightforward, set backslash and DONT forget to glue bolts to the ring gear (on one of our diffs they did break loose and it did not ended up good )

Here are some pics from swap :

http://rx7cz.net/photos/workshop56/

So, by looking at the different lengths of the stub axles on the S5 and then looking at the length of the short S4 stub axle you can see that the S4 is sort of a compromise in length between the short and long S5 stubs. You are saying that that compromise is acceptable, huh?

Then of course I would get two S5 haftshafts.