Replacing the Shaft and Pinion Cup

[greggh]

I just pulled the rear off and the pinion gears have enough wear that they need to be replaced.
The Pinion cup looks ok but for the price it is getting replaced alsoalong with The shaft oil seal the ring stopper.

Is there anything that I have missed?
TIA
Gregg

[GOOSE]

greggh.....i hope you are talking about the pinion cup teeth, and not the actual pinion gear inside the final drive.  also replace the three o-rings in the final drive.  good luck.

[greggh]

Hey Goose,  The cup that the drive shaft goes into yes.
+1 on the 3 O rings.

[Daniel Meyer]

Yes, *always* replace the cup and shaft as a set. If you look down inside, the wear on the cup will match the shaft exactly. Stick a new shaft in the old cup and it's only a few thousand miles before it's gone again.

[greggh]

Thanks Daniel, that was the mind set I had also.

[rhinor61]

Daniel so you cant put a low mileage shaft with new pinion cup either...? Or is the Pinion cup the softer of the two?


thanks,
John Meyer

[Daniel Meyer]

Neither is "softer" it's just that they will "mate" very rapidly...so your new cup will wear to the old shaft nearly immediately.

If the shaft is in excellent condition (no wear) then go for it. If the shaft shows any wear at all, I'd buy a new shaft to go with the new cup.

[Ricky-D]

I agree with the consideration that an old spline will wear a newly installed spline to match pretty quickly depending upon the use and abuse.

So the same consideration is aptly applied to the drive splines in the rear wheel and pumpkin.

I also think that since a machine has created the spline parts, they are not all equal around the circumference of the spline area.

So, every time the spline parts are separated and then put back together, if they are not returned to the exact place relationship, there will be a wearing-in process started again.

That said, I myself have replaced the drive shaft only into an already used pinion cup. The old drive shaft was pretty worn and the cup appeared in fairly good condition still.

I simply cleaned the cup up and greased the two parts and reinstalled the new drive shaft. It actually wasn't a new drive shaft but and old one that I had received when I bought an old pumpkin. The original owner had no idea of how to remove the shaft so he sent the whole thing to me.

About replacing the pinion cup, the only thing that concerns me is using an impact wrench to tighten down the pinion cup nut.  I do not like the though that it is the gears in the pumpkin that are having to absorb all the force of the hammering, with it being applied to the gear tooth.

***

[greggh]

So how would you tightrn the Pinion cup Nut with out an impact.
I know using an impact to take it off is the way to go.
Any other feed back?

[Tropic traveler]

Replaced worn out driveshaft & pinion cup {at 100,000 miles} with a like new 20K mile used driveshaft & a new pinion cup. I don't think the d/s & cup ever received any grease!


Anyhow, removed the pinion cup with an electric impact & resealed the entire pumpkin while I was there. 8K miles so far with no problemos. 

YIKES!!!!!! Not real secure on that jack there! 

[greggh]

Travler,   Mine looks very close to that, I expect to see the new parts by Monday I will have everything ready to go back together by then.

My Valk is on the lift just like yours only I have a tiedown securing it as well.
Gregg