Question about 2006 Harley Davidson FLHR Road king

1 Answer

Transmission hard to upshift when cold

I have a 2006 Road King with <40K miles that is difficult to upshift when cold. Although there is no significant increase in shift arm resistance, the "return spring" feel seems flat and doesn't provide the shift arm in the correct position for upshifting until it warms up in a few miles. After it's warm, all appears normal. Seems like the oil viscosity is now too high and overcomes any internal spring and/or there is too much internal drag until it warms up. Any thoughts on the cause/solution? I have fresh oil in the gearbox (although some evidence of water has entered due to a poor vent design...).

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,623 Answers

Switch to Mobil 1 Syn gear lube 75w90 in the tranny.
Works very well in HD sure to drain and flush...a little water does a lot of harm.
Good luck with your bike...i hope this helps.

Posted on Jul 31, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How much transmission oil does a1999 HD road king hold?

Hi Anonymous, 20-24oz. HD Transmision Lubricant. Have nice day.

Apr 13, 2013 | 2006 Harley Davidson FLHR Road king

1 Answer

My 2005 road king shift shaft on my transmission seems stripped

Could quite well be OR the screw on the shift arm is loose. If you can tighten it with a ling 1.4 inch ball Allen okay but if not you will need to pull the primary cover and the inner primary case to get at the shift shaft and if it is stripped you will need to pull the transmission cassette to get the shifter pawl and shaft assembly out. The weld on the pawl assembly alos breaks and then when the shifter arm turns the shaft the pawl doe not turn. This also requires transmission disassembly to repair.

Nov 14, 2012 | 2006 Harley Davidson FLHR Road king

1 Answer

Shifter diagram

What part is loose? If it is the arm on the shift rod you might be able to get a long 1/4 ball allen in behind the primary case and tighten it or get a new bolt installed and tightened but if the arm or the shaft serrations are worn you will need to pull the inner and outer primary to install a new arm and pull the trans gear set out to change the shift rod.

Jun 19, 2012 | 2006 Harley Davidson FLHR Road king

2 Answers

Shifting from first to second on Harley 2003 Roadking

That is the normal shift pattern, then to third etc.

Apr 29, 2012 | 2003 Harley Davidson FLHR Road king

1 Answer

Does the transmission need to have the fluid changed at specific intervals? S-Type 2006 Jaguar

you should have it flushed only at 40k miles.some dealers will say every 30k miles....but it should not be changed until 125k miles....the fluid is very expensive...35 dollars a quart...but up to this point just flush the fluid which will clean it for reuse...

Aug 25, 2011 | 2006 Jaguar S-Type

1 Answer

97 civic ex auto with 40k miles. Under slow acceleration, upshifts are 'lazy' with engine speeding up for a few 'moments' before shift is completed. More brisk acceleration delivers better or normal...

A '97 with only 40k ? Wow ! Sounds like a transmission issue. I would begin with changing the transmission fluid and filter. If that didn't work, I'd take it to a transmission shop because there isn't much you can do on your own with a transmission due to their inherent complexity.

Apr 06, 2011 | 1997 Honda Civic

1 Answer

2005 Road King oil light came on this morning when I started it. I turned it off, garaged it and went to work in my truck. Gonna go trouble shoot tonight. its only got 6,400 miles on it. what might it be?

I've heard the Twin Cam oil sensor located in the front of the cam chest is prone to giving problems. Start the engine and listen. If the engine sounds normal, check to see if you can determine oil flow back to the oil tank. I'm pretty sure the Road King oil tank is on the bottom of the transmission which is going to make this difficult. But, the fact still remains, if you do not have any oil pressure, your tappets will clatter like hell. It will be obvious that you don't have oil pressure. Check the wire to the sensor on the front of the "nosecone".

Good Luck

Jan 18, 2011 | 2005 Harley Davidson FLHRS - FLHRSI Road...

1 Answer

I changed the mufflers on my 2006 Road King from stock to Rush mufflers with 2" baffles. I notice that I now have tranny fluid coming from the over flow hose. Difference in back pressure?

The exhaust back pressure won't affect the transmission oil or pressure.
I think it needs investigating and maybe there will be a simple answer.

Jan 15, 2011 | 2006 Harley Davidson FLHRI Road King

2 Answers

I have a 2006 streetglide with40,000 miles on it and loud noise in the top of the motor

40k miles you're lucky that thing still runs, but it could be a droped valve or a broken retainer clip take the valve cover off and inspect ,if the problem is lower down then just look for a used motor online it's simpler that way and cheeper

Dec 09, 2010 | 2006 Harley Davidson FLHR Road king

Not finding what you are looking for?
2006 Harley Davidson FLHR Road king Logo

166 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

Gills Lango

Level 2 Expert

195 Answers


Level 3 Expert

4336 Answers

Are you a Harley Davidson Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides