Driveshaft fell to bits, metal 'cup' stuck on gearbox shaft, how to get it off?

[coolspot007007]

A bearing in the driveshaft (gearbox end) fell to bits and when I went to remove the remnants from the gearbox shaft it wouldn't budge. I've tried heat on it, penetrating oil, shocking it with a mallet, hasn't budged. I'm guessing the teeth are mangled together, hoping not, but can't figure out how to remove it. The raised lip around the shaft looks like it might cause a problem for a puller but I'm not sure.

 

[Tin cup]

I'd use 2 metal wedges one on both side hit evenly that will pop it

 

[bmh.01]

Guessing that cv joint has got seriously hot at some point? Hence it now being thermally siezed to the diff.

You can't really do anymore than you already have been doing, i'd say careful heat and shock is about all you can do without removing the box from the car as you can't really get anything in there to apply a constant force. You've got to be careful not to screw the diff bearings too.

 

[coolspot007007]

Think I'll have to take the box off and pick up a spare box so its there if needed.

 

[Jaff.]

On the older jc5's there's a roll pin securing the shaft on the drive splines out of the box. Check yours hasn't got one first

 

[bmh.01]

Unfortuantely I don't think you've got much choice really, far more options for getting it off when you can get round it properly.

 

[bmh.01]

On the older jc5's there's a roll pin securing the shaft on the drive splines out of the box. Check yours hasn't got one first

Thats a good shout I forgot about that, never seen one personally on a 172 mind.

 

[coolspot007007]

Not the roll pin unfortunately.