My '79 GTV has an early '76 style tailshaft, and I've been slowly collecting the parts needed to fit the correct type.
I thought I had everything I needed - larger clutch input shaft flange, three new giubos, new center support bearing and spherical bush, and the tailshaft itself.
While fitting the new rear giubo to the shaft I found that the old one that came fitted to the new (to me) shaft had a captive spherical bearing, but the new giubo has a 22mm diameter hole, expecting the spherical bearing to be attached to the back of the tailshaft.
And these two giubos have the same part number on them
From what I can tell, in ~82 the tailshaft was revised a bit and instead of a 14mm pin on the rear, it had a 12mm pin with a 12 ID / 22 OD spherical bearing pressed on - which would make sense in the context of the redesigned rear giubo's center bore.
So it looks like I have the wrong rear giubo. I can't return it, I've had it for years while I collected the other parts.
The correct rear giubos are considerably more expensive, and a little hard to come by, so I was wondering if its possible to use the later style so started looking for options.
1) Use a 14mm spherical bearing - I can't find one in any catalog. Standard sizing is 12 or 15mm.
2) Stick the rear half of the tailshaft in a lathe and turn the pin down to 12mm - pretty sure my lathe is way too small for that
3) Fit a 14x22 needle roller bearing - bad things would happen if alignment wasn't perfect
4) Machine up a 22mm bronze ball, press onto the shaft and see how long it lasts
5) just assemble without any rear locating bearing #yolo
6) Find somewhere that has stock of the correct giubo, hand over ~$350 and hope I'm sent the correct type
While researching all this, I came across
this post where LukeC mentions that the later style giubos
can be used for earlier cars so that sounds promising, but was wondering what's actually involved?
