Am I missing something? Rocco 16v shafts = MK2 Golf

The position of the strut mounting doesn't matter tho (for eg).

And neither does the ball joint.

So it's just down to adding up the distance

• from the ouput flange
• to the shaft
• then to the outer cv
• then to the splined hub flange sits against the outer CV
• and then the distance to the face of the hub flange for the wheel to sit on

...with a very similar ET, if not he same, between Mk1 & 2.

 

Not sure if this helps, but I was running 100mm inner and 100mmm outer cv joints on rocco shafts but found it wore out the inner cv very quickly. It seems to be slightly longer than a 100mm inner, and 90mm outer combination. This extra length seemed tight between the hub and box and therefore putting a constant force against the CV joints. the combination of the two different sizes seems to have corrected the problem.
The only thing left is the strength issue, is the 100mm outer cv much stronger than the 90mm version? Not that i've had any problems in my mk1 abf. (touch wood)

 

Yep, gotcha. The proof has to be in the length of the hub flange from Mk1 compared to Mk2.

By this I mean the length from the rear face of the hub flange, to the innermost partr that goes inside the hub bearing.

This is because the outer CV splines into that and sits snug against the back of the hub flange and in so doing supports the hub bearing inner race. So that defines the length of the shaft required.

Couple of Mk1 hub pics at random - compared also with another couple of sets and no differences seen:

 

Yep, got these bits to hand, so can do this evening

 

mk1 outer cvs are shorter than 100mm mk2 ones, although shafts were the same length when i checked

 

An evening later... Mk1 hub flanges:



In mm:

 

inners or outers?

90mm inners are "thinner" than 100mm inners.

 

I bought some new GSF 100mm inners when I put the car together and found that they would not fit because of the 100mm inners being thicker. But then I had a look at the 100mm inners on the old VAG cabrio (supposidly) shafts in my garage and the 100mm inners on those shafts were thin just like the 90mm ones! . I think they even have a VW stamp on them.

Gurds

 

So another jigsaw piece appears... Getting tricker!

 

Are we missing the outer CV factor here also?

ie could the Mk2 outer CV be longer and add to shaft length?

AFAIK, all Mk1 GTI 90mm / 100mm corresponding outer (GTI) CVs are all the same size?



Measuring outer CV diamensions here - GKN part no 302175 (assumed Mk1 GTI):

• Inner bearing face to back of CV: 60.5mm

• dia where CV boot sits on (recessed bit): 87mm

 

So it effectively packages the whole lot up as one unit and we can forget about any CV diffs..

Ah, but, I though the Mk2 outer CV was bigger

 

So if i may ask a question - If i was to use a mk2 16v box could i simply add the larger outter CVs to the scirocco drive shafts i am using now (currently have the 1.6 box with the 16v motor not a good combo)

cheers