Boxerworks.com

I've got my gearbox on the bench while doing a rear main seal and I have a question about weather it's functioning properly. Rotating the input shaft by hand while pulling on it causes it to bind. When I push on the shaft or put pressure on it radially while turning it, things seem fine. No notchy-ness in the bearing is detected when its turned, even when it's binding. Waht is causing this?

In use things seem fine although 4th gear has a distinct wine which may just be the helical gear noise that's often talked about, I have nothing to compare it too so don't know if the sound is a clue.

Can I run this box or does it need service? Thanks.
DF

'73 R75/5

I suggest that you need to perform a bench test to see if it does the shifting properly. Did you drain the oil to see if it is clean?

Duane Ausherman wrote:I suggest that you need to perform a bench test to see if it does the shifting properly. Did you drain the oil to see if it is clean?

Duane talks about how to do a bench test on his website, IIRC.


Ken

When this box was in the bike the shifting seemed fine, no noticeable problem. It would come out of third gear occasionally when cold, but hasn't done that for a while, mostly cause I shift more deliberately now. I did notice while pushing and pulling on the input shaft that there's some slack in there, it'll move forward and back just a bit.

I'll go through the bench test next to see what else I can find out.

DF