Differential / Transmission Sound

[raescuin]

On my 2012 GL1800 with Roadsmith trike kit, I'm noticing a sound like humming and slight grinding on all gears. I noticed there's no play or back and forth movement on the drive shaft between the transmission and differential. There is a ring that adjust the movement. My question is how much back and forth movement should it have? Thanks

[CrystalPistol]

On my 2012 GL1800 with Roadsmith trike kit, I'm noticing a sound like humming and slight grinding on all gears. I noticed there's no play or back and forth movement on the drive shaft between the transmission and differential. There is a ring that adjust the movement. My question is how much back and forth movement should it have? Thanks

Where do you see this "ring"?

I wouldn't expect to see any end to end free movement of the drive shaft once it's in place.

Not to say you don't have a bad or failing U-joint …

… just that driveshaft should not move freely forwards or backwards once put in place.

[raescuin]

The U-Joints are fine. The ring is located towards differential side. I think the ring prevents the shaft from coming off the transmission. I've adjusted the ring with a 1/4" movement back and forth and I don't hear the noise anymore but I'm not sure if that was right.

I've also loosened the ring and when I pull the drive shaft towards differential it comes off the transmission shaft.

I hope the picture helps. and thank you.

[Marc H]

I have no firsthand knowledge but I believe the front yolk should be attached to the trans output shaft.I do not believe that split collar is something Roadsmith did.Hopefully someone with more knowledge will chime in soon.

[raescuin]

Spoke with the Roadsmith Trike shop and they recommended a 1/16-1/8" play. While I was on it I grease the spline (it was dry) and did a ride test and it was a quiet ride. The noise is gone.. Thank you for the support.