EDIT. I'm lost.

Just sayin.

 

Guys lets play nice ok? No one needs school or after school scolding. We are all tryin to figure this out, until there is a permanent fix, NO ONE IS WRONG! The arguments don't solve anything, lets work together! The more ideas and test the sooner we find out. I for one appreciate all the thought process and work going into this issue.

1.) It appears that Motojockey got a new case and gearset, he said as much in his post that they were not one assembly, shipped separately.

2.) We don't know that the NEW CASE is a NEW DESIGN or has been modified by the MOCO or just a replacement.

3.) My bike has experienced this issue NOT ON A DYNO, RAN 4k plus and also RAN under 4k, rpm did not appear to change the amount of transfer IN MY FLHXS.

4.) It seems as though production date does not matter, some early production as well as recent production dates have the issue.

5.) There are pictures (limited view) of a twin cam case vs. the M8 case showing the different vents on the other forum.

Now just thinkin out loud........some guys feel input from shifting thru the clutch lever as I DO but lots of guys don't. It's a question that is way out there I agree but I wonder if there is a connection to that and the oil transfer? And NO I can't explain why or how that could be possible.....but so far, we can't for sure explain the oil transfer either!

We can only hope that the MOCO reads this stuff and is working hard on a solution as well.

Eagle Out

 

OK, so making a 3/4" change to allow any and all the pressure in the transmission case to escape out the hole is no different. Guess we went to different schools. As LP pointed out a little change makes a huge change in Hz. Your suggested change is what? You did not change the exit orifice size at all so the chamber size never changed just allowed the transmission case a slight larger and I do mean very slightly, path into the breather chamber. All pressures and volumes remain the same. All I can say is good luck with it.

 

I do not know what the changes are that HD has/is supplied. I would think they have done things for a reason as this is costing them big! A simple change of the guts would be much cheaper to ship and have installed than what they are doing. The way they have always sold and shipped the guts is preassembled but no case, so this is a change. There is no easy way to get the entire transmission out of the bike so they must pay more labor cost for the R&R too.

 

LP said he was lost? Think about it.. 3/4 inch hole is way smaller then the chamber surface area.. How much is it going to change in HZ? From a resonate point of view IIRC the frequency goes up with the hole..

Yeah cut it n half and the problem is gone..

 

We need to put pre and post 2017 transmission components on a table and have a look. We do know there are part changes listed for 2017 if the online fiche data from HD is to be believed.

The guts and gears may have been improved recently which would be a third design iteration. Whatever fixes the issue needs to be implemented.

It's quite a stretch to believe HD hasn't observed it in their testing program to date and developed a fix, which may only be a machining correction of some component. They have the resources to do that unlike owners and service folks trying to make a profit. It may also be a vendor specific problem that varied from HD's design.

Lots of unknowns so I'll hold my head and be calm.

Edit: Oh and the clutch lever pulse is common to slip/assist clutches that by their load and unload action move the actuator components hydraulically up through the lever. Common to BMW's with a similar clutch in my experience.

 

well the good thing is the 'ice breaker' has apparently occurred with the MOCO..one would think the engineering team has been tasked to prioritize their resources and attention accordingly as to not wait for this to overwhelm them if they believe the flood gates may potentially open..which we don't really have any fact driven knowledge of real World scope at this time, which would be warranty claims vs units sold = rate of failure. hopefully they are getting out ahead of this regardless of the numbers they are seeing

 

Still waiting to see a Shop ticket for warranty repair on one of these replaced transmission.

 

I edited my post because I didn't want to get more into this but...

In terms of frequency, a musical instrument may have small or large holes that affect resonance greatly. Big or small, both have a measurable affect.
I find it weird to argue that enlarging a vent hole 1/16 would be a plausible fix, but putting an even larger 3/4 hole would have no affect because the "case is so large". Weird argument. Lost.
The 3/4 hole is closer to the source as well. The vent tube is miles away from the main shaft.

Anyway. Kinda with Steve on this one. I figure he's not paper troubleshooting, and is actually trying stuff physically because he has resources.
More over, his theory sounds more plausible to me. No offence Max, but I know you tend to over think sometimes. Just wondering if this is one of those times. No biggie.

 

Bike on jiffy stand trans screw trans dipstick down until the O ring touches the housing.