General Harley Davidson Chat Forum to discuss general Harley Davidson issues, topics, and experiences.
Sponsored by:
Sponsored by:

Transmission and primary service fluid questions

Thread Tools
 
Search this Thread
 
Old Jun 13, 2011 | 01:01 PM
  #1  
CaptainK's Avatar
CaptainK
Thread Starter
|
Cruiser
Joined: May 2011
Posts: 129
Likes: 0
From: Texas
Default Transmission and primary service fluid questions

I tried to search but the possibiities are almost endless.
Anyways I was reading about Redline V-twin transmission fluid and I would like to try it, but the unfortunate part is the only dealers that stock it are a good way away. I would mail order it but I really want to take care of it now since I am doing some other maintenance.
Is ther an alternative to Redline with shock reduction that works as well? Preferably something more common.

Also I am changing my primary while working on it and was looking for opinions on that fluid as well. I am currently runnig HD stuff but would rather use something else if it is better.

I appreciate any responses.
 
Old Jun 13, 2011 | 01:51 PM
  #2  
Then Came Bronson's Avatar
Then Came Bronson
Grand HDF Member
Veteran: Marine Corps
15 Year Member
Liked
Community Favorite
Joined: Oct 2009
Posts: 3,918
Likes: 3,715
From: Hill Country, TX
Default

Originally Posted by CaptainK
I tried to search but the possibiities are almost endless.
Anyways I was reading about Redline V-twin transmission fluid and I would like to try it, but the unfortunate part is the only dealers that stock it are a good way away. I would mail order it but I really want to take care of it now since I am doing some other maintenance.
Is ther an alternative to Redline with shock reduction that works as well? Preferably something more common.

Also I am changing my primary while working on it and was looking for opinions on that fluid as well. I am currently runnig HD stuff but would rather use something else if it is better.
Did you check online for participating dealers, or at least call around to some auto/motorcycle supply stores? Unless you live out in BFE, Redline is pretty common...at least it is out here in CA.

Redline also markets a specific primary oil for Harleys.

As for alternatives to Redline, the list is long: Amsoil, Spectro 6, Royal Purple, Bel Rey, and the list goes on and on.
 
Old Jun 13, 2011 | 01:55 PM
  #3  
NoCoLoco's Avatar
NoCoLoco
Road Warrior
Joined: Jul 2009
Posts: 1,979
Likes: 2
From: Northern Colorado
Default

Originally Posted by CaptainK
Also I am changing my primary while working on it and was looking for opinions on that fluid as well. I am currently runnig HD stuff but would rather use something else if it is better.
Formula+ works just as good as anything else in the primary and I personally don't see the point in using something different, you won't be gaining anything. JMO
 
Old Jun 13, 2011 | 03:05 PM
  #4  
Black Bart's Avatar
Black Bart
Road Master
Joined: Aug 2006
Posts: 1,189
Likes: 3
From: Massachusetts
Default

+1 on Formula + in the primary. Try a good quality gear oil in the tranny, either a 75W/90 or a 85W/140 depending upon how much noise you have from your gears.
 
Old Jun 14, 2011 | 07:28 AM
  #5  
dog155's Avatar
dog155
Extreme HDF Member
Joined: Nov 2006
Posts: 13,389
Likes: 26
From: Windham,Maine
Default

As you probably already know there are a lot of choices as there are a lot of opinions on what's best.Today there area lot of great choices mine is Amsoil, just use the correct products for each hole,you can't go wrong.
 
Old Jun 14, 2011 | 08:01 AM
  #6  
KBFXDLI's Avatar
KBFXDLI
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
Default

Formula + or Mobil1Vtwin 10w40 in the primary and any 85w140 gear oil in the trans. Most dealers carry BelRay Gear Saver 85w140 which is pretty good or just go to autozone and get Mobil1 85w140. If you don't have a dealer nearby then go to autozone and get Mobil1Vtwin 20w50 for the engine, Vtwin 10w40 for the primary and 85w140 gear oil for the trans and you will be fine.
 
Old Jun 14, 2011 | 09:49 AM
  #7  
babalu's Avatar
babalu
Outstanding HDF Member
Joined: Mar 2010
Posts: 2,202
Likes: 5
From: Hudson Valley, NY
Default

i use amsoil in the primary and engine and redline in the tranny. redline is good because if you have a leak you'll know where it's coming from. it's tough to see the tranny plug if it's leaking.
 
Old Jun 14, 2011 | 10:23 AM
  #8  
Redleg by God!'s Avatar
Redleg by God!
Cruiser
Joined: Mar 2009
Posts: 173
Likes: 1
From: McDonough, GA
Default

Originally Posted by CaptainK
I tried to search but the possibiities are almost endless.
Anyways I was reading about Redline V-twin transmission fluid and I would like to try it, but the unfortunate part is the only dealers that stock it are a good way away. I would mail order it but I really want to take care of it now since I am doing some other maintenance.
Is ther an alternative to Redline with shock reduction that works as well? Preferably something more common.

Also I am changing my primary while working on it and was looking for opinions on that fluid as well. I am currently runnig HD stuff but would rather use something else if it is better.

I appreciate any responses.

Try racer parts wholesale on line. They have a Redline package that includes all the fluids, a funnel, and a ball cap. The price is reasonable and it will be at your door in a couple days. i ahave used them for the last year and really like the product

Good luck.
 

Last edited by Redleg by God!; Jun 14, 2011 at 10:42 AM.
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-4

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Jun 14, 2011 | 06:40 PM
  #9  
OldMike's Avatar
OldMike
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2009
Posts: 5,642
Likes: 1,985
From: Cleveland Zoo
Default

Use Royal Purple in the trans and Mobile 1 synthetic ATF in the primary.
 
Old Jun 14, 2011 | 11:01 PM
  #10  
CaptainK's Avatar
CaptainK
Thread Starter
|
Cruiser
Joined: May 2011
Posts: 129
Likes: 0
From: Texas
Default

I bit the bullet and drove into Houston today and bought Redline. I did the shock proof for the trans and the Redline V-twin primary oil.
The trans oil was really thick and looked awful, now the primary Redline oil looked really thin, so I am second guessing that one.
I will run it for a few days and see what I think. I may swap the primary back to formula if I have any concerns. Oil is cheap and parts are not, so time will tell.
 

Last edited by CaptainK; Jun 14, 2011 at 11:16 PM.



All times are GMT -5. The time now is 03:32 AM.

story-0
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-1
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-2
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-3
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-4
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-5
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-6
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-7
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-8
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE