Hooke joint position?

[Dogbytes]

Having taken mine apart (some time ago!) I now have nothing to refer to.

I've offered up the engine/transmission to the ST, in its new position, and it looks quite promising. However with a 25mm spacer between the gearbox output and the flange of the driveshaft the engine is 35mm forward of its original position! Obviously, since the engine and gearbox haven't grown since they came out, the culprit has to be the position of the shaft in the mono lever. Can anyone think of anything stupid I may have done in assembling this? I mean it looks simple enough! The central 'cross' of the Hooke joint is not on the same plane as the swing arm pivot and presumably it should be. Does this offer any clue? I'll take at apart again today and check everything butbI don't want to weld the engine mounts in until I know what the problem is.

 

[nick.ct]

Have you tipped up the engine at the front as well?

This would have the effect of adding a few mm to the expected movement as the engine has rotated as well as being moved forward

 

[Voyager]

Is the driveshaft fully engaged with the bevel drive ??

Bob.

 

[Dogbytes]

Have you tipped up the engine at the front as well?

This would have the effect of adding a few mm to the expected movement as the engine has rotated as well as being moved forward

Yes, the engine is raised at the front but none of the mounts are welded in yet so the whole lot can float. It just won't move back to where it should be... That is, where I think it should be!

 

[Dogbytes]

Is the driveshaft fully engaged with the bevel drive ??

Bob.

That's a good point and I'm going to check right now. However I'd imagined that the engagement would be adjusted and fixed pretty solidly - unless the bearings are totally shot, otherwise it would impose an end load on the driveshaft, the Hooke joint and then the gearbox... Or am I missing some subtlety of Teutonic engineering? Going to pull it apart again now...

 

[Dogbytes]

Is the driveshaft fully engaged with the bevel drive ??

Bob.

Actually, re-reading your post and having looked at the offending item, I take your point. I was thinking crown wheel and pinion engagement and you meant the female spline in then driveshaft and the corresponding male spline in the bevel box. The answer is no, I think. It all slides together until the end of the studs are level with the back of the monolever flange then it stops dead. Without putting a vernier on it (which I'll do after lunch) it doesn't look like it would slide all the way but should certainly go further on. Puzzling. The engine is now clamped in its 25mm forward position and with a 25mm spacer behind the gearbox flange. It all really comes down to where the Hooke joint should be in relation to the monolever axis.

The good news is that when I've discovered the solution I'll never forget it!

 

[Dogbytes]

problem (almost) solved (I think)

Has anyone got a monolever with the bevel box removed but the driveshaft still bolted up to the gearbox? If so I'd be most grateful for this measurement!

 

[Kenny]

Something I've never measured TBH..but here's a couple of pics of a G/S I used to own and I removed the diff to replace the oil seal.

 

[Dogbytes]

Thanks Kenny. That confirms my suspicions. If anyone else has got a measurement that would be great. If not, I'll put all my bits back I their original positions and measure it.