Back in a MK1!!!

[dubstar]

Check that the outer cv is not rubbing inside the upright/bearing housing as on some there is minimal clearance for 100 mm cv's.

What he said. The bearing housings are different between the 90mm and 100mm outer CVs. You can use a die grinder to clearance them, or a mill, if you have it.

[dubsquad]

Back in a MK1!!!

Only my driver's side rubbed but used a dremel to remove the metal on the housing. The whirring/bearing noise is still there. Is there suppose to be some play in the shaft? Mine is tight with no movement.


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[sports racer]

Shouldn't be any movement. One end is bolted to the gearbox and the end with the spline is held (very) tight in the hub with the locknut done up to 5 gazillion pounds torque.

[dubstar]

If you ran it for some time with the metal to metal interference then you may have damaged the CV or wheel bearing.

[dubstar]

Also, what is the actual inner CV. outer CV, driveshaft combination?

The driveshafts that came with 90mm inner CVs were longer than the proper 100mm inner CV driveshafts. This is because the 90mm flanges on the gearbox sit shallower than the 100mm flanges.

One of the cheat's ways of using a 100mm inner CV on a driveshaft that was built for 90mm inner CVs was to put the driveshaft in a lathe and clearance the splines so the larger 100mm CV can fit on. However, that still means the driveshaft is still longer than it should b,e which will put undue force and tension on the CVs. This is particularly a problem when you lower the car.

In short, if you are running 100mm inner CVs and 100mm gearbox flanges then you should get the matching 100mm Mk1 driveshafts (Mk2 shafts are different again!). If you only have 90mm driveshafts, I would switch the gearbox flanges to 90mm and the matching CVs.

Here are the bare driveshaft lengths (from clubgti)

Golf 1 (90mm inner CV and flanges)
Short shaft: 445.5mm
Long shaft: 658mm


Scirocco / Golf Cabrio (100mm inner CVs)
Short shaft: 430mm
Long shaft: 650mm

[dubsquad]

The original setup was 100mm inners with 90mm outers( the cheat). Currently its got all 100mm in with cabrio shafts. Been looking online and it seems that there are a few different options for the 100mm cv's. Some have a 55mm face and some 53mm.

Also chatted with another mk1 owner and he said he got the same noise when he fitted a new rear gearbox mount and overtightening the case bolts.

What do you guys reckon?

Cheers
Leigh


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