Running Synthetic-how often change tran/clutch
 

Hi,
I am running HD Syn3 in all 3 holes....manual says change tran and Clutch every 5k...does this still hold true running synthetic??

Thanks

RE: Running Synthetic-how often change tran/clutch
 

I would still change at the recommended intervals. I know it is supposed to last longer but its such a small quantity why not change it? Also, you might avoid warranty issues.

RE: Running Synthetic-how often change tran/clutch
 

Engine 5000.
primary 5000

trans...drain that $hit out and get some synthetic 75w90 gear oil and run it 15000

RE: Running Synthetic-how often change tran/clutch
 

+1.

RE: Running Synthetic-how often change tran/clutch
 

Please inform all dealership personnel that the extended service intervals for SYN3 have been approved
through the Harley-Davidson Motor Company are as follows:
All Big Twin:
Crankcase: Replace after first 1,000 break-in, then every 5,000 thereafter (unchanged)
Primary: Replace after first 1,000 break-in, then every 10,000 thereafter or prior to winter or
extended storage periods
Transmission: Replace after first 1,000 break-in, then every 20,000 thereafter or prior to winter or

RE: Running Synthetic-how often change tran/clutch
 

While the above may true..........changing ALL THREE lubricants at least once a year (regardless of mileage) is exceptionally cheap insurance for a machine that costs $ 20K. I can purchase my Mobil1 VT, Redline SP, HD 5 micron filter, O-rings & primary gasket for under $100.00 .

Of course oil changes are ALWAYS mileage contingent.........I change mine every 3k.

Just my unsolicited $ .02 !!!

RE: Running Synthetic-how often change tran/clutch
 

For 2008, these are the service intervals listed in the owner's manual, regardless of fluid type, synthetic or dino.

RE: Running Synthetic-how often change tran/clutch
 

No matter if you run synthetic or dino....... oil and filter changes are STILL the absolute cheapest insurance for your baby that you can provide.
And, whatever you do, don't neglect the air filter in your change. An intake system that is restricted by dirt/debris, or a hole/tear in your filter can allow contaminates to enterthe cylinders and wipe out an engine in an amazingly short period of time.

RE: Running Synthetic-how often change tran/clutch
 

Exactly.

Some here say change more frequently, and you won't hurt it by doing so but it is not necessary or helpful. The exceptionsare if you ride in extremely dusty conditions or do a lot of idling, or other than "normal" riding.

I have been riding Harleys for over thirty years and probably several hundred thousand miles and I have always pretty much followed the moco recommendations and used Harley oil without ever having an engine or transmission problem.

RE: Running Synthetic-how often change tran/clutch
 

RonB and txfsxtrider +1

5k engine
10k primary
20k transmission