I put Redline Shockproof in my 07 RKC and it made only a small difference. I resisted putting the IDS on for 2 years and once I did that, could no longer hear the whine.

 

If the Redline oil doesn't fix it, Baker also make a gear set specifically addressing this issue. It would be a whole lot cheaper than a complete transmission.

 

I don't understand the need for a "fix" for something that isn't a problem. Baker was smart enough to realize a money making "issue" and design a replacement helical cut 5th gear though, so good for them. I'm sure they have sold a ton of them too.

 

Here's your solution. Rinehart exhaust. You won't hear whine then. LOL

 

I went with the IDS and Redline at the same time - really quieted it down. It was still noticeable, especially when headed downhill and off the throttle. I thought I'd gotten used to it, until I got the RGU... then I realized how often I'd avoided 5th.

 

Actually, I could - even with RTDs, Redline, and IDS. It was not a factor that moved me off the '07, but I sure don't miss the whine!

 

I don't like it either. I now use Amsoil gear oil which seems to help a little. I also think as I put more miles on it, it gets better.

 

If the trans oil doesn't work, here's a few options:

Stock HD "2011" 6 speed trans. Upgraded parts and helical 5th. Around $1500 DIY through Zanotti's, Chicago, etc...
Click here: http://www.harley-davidson.com/gma/g...bmLocale=en_US

Baker F6F (5th gear whine). Around $900 DIY.
Click here: http://www.bakerdrivetrain.com/f6f/index.htm

Baker DD7 (7speed trans). Around $3000 DIY.
Click here: http://store.bakerdrivetrain.com/Ite...ode=DD7&key=br

To me the 2011 stock trans seems like the best deal. Just bolt it in - no need to fool with trans internals. Although the DD7 seems pretty cool, and the trans internals are pretty easy to swap once you get the Main Drive Gear out.

 

Forgot to mention these parts which are now standard on newer models.

SE Compensator. About $250 DIY.
Click here: http://www.harley-davidson.com/gma/g...bmLocale=en_US

IDS. About $205 DIY.
Click here: http://www.harley-davidson.com/gma/g...bmLocale=en_US

In my opinion the IDS is MANDATORY! Smooths out most driveline pulses. The SE Comp finishes the job, and will add some service life to your starter.

 

Easy fix. Order an IDS (Isolated Drive System). Starting in 08 they came standard on touring models. For the 07 you will have to order it and best to have it installed by someone who has the right bearing installation tool. No more whine. Will ride like a dream. No need to really go with a heavier gear oil if you don't want to.

From HD

Part #40287-07


Fits '07 Touring (except Japanese) models equipped with Original Equipment and Harley-Davidson® accessory wheels. Will not fit with 80-Spoke Laced Wheel P/N 42954-04, Polished Spun Aluminum Disc Wheel P/N 43760-03 or Slotted Six-Spoke Wheel P/N 43932-02 (chrome) or 43933-02 (black).

MSRP US $309.95