01RUBY500 1,253 Posted January 3, 2020 I was wondering what the general consensus is here about the early Hondamatic Rubicon transmissions from 2001-2006? I have read on other forums that Honda had issues with them failing early and being expensive to fix, and quite a good number of owners were having these issues. I have a 2001 Rubicon with 1700 miles on it and still runs great. I bought it little over year ago with 1400 miles on it. Most of my use is plowing and hauling a trailer around my 75 acres. So I’ve been wondering if I’ve got a ticking time bomb of a tranny based on these other forums? Share this post Link to post Share on other sites
toodeep 1,759 Posted January 3, 2020 I have many customers still using them with well over 15,000 miles on them. It was a hit and miss if they had problems. In my area there are a lot more out there running with no issues than ones I fixed with issues. The oil pump was the main issue with the 01-04 which gave transmission problems. If it's working good I would continue to put it to work and not worry much about it. 2 Share this post Link to post Share on other sites
jeepwm69 7,719 Posted January 3, 2020 The early 01 Rubicons had an iffy oil pump that @harig over on the Hondaforeman forum described "I do know that the early Ruby's had a problem with the oil pump bypass valve. Most of the time the relief would stick open and cause low oil pressure that would cook the hondamatic. i do not know what year you are working on but 01 to 04 had problems with the bypass on oil pump. new newer one are redesigned." So, it's not the actual transmission, but the oil pump that was redesigned. I haven't torn into one, although I have picked up an 05 Rubicon now. Apparently replacing the oil pump requires splitting cases. Harig actually rebuilds the Hondamatics, so I think he understands them better than most. 1 Share this post Link to post Share on other sites
01RUBY500 1,253 Posted January 3, 2020 Thanks. Good stuff to know. I was hoping to keep running it. Share this post Link to post Share on other sites
jeepwm69 7,719 Posted April 28, 2020 I've tried to get Harig to come over. Haven't gotten a reply lately. That guy was the guru on the Hondatmatics. I need to pull the engine on the 2012 Rubicon I bought a few weeks ago and see if the oil pump chain jumped or if it has much bigger problems. The guy up in Indianapolis who had a CL ad selling rebuilt ones has disappeared, so he and Harig were the only two guys I know of who could work on the actual Hondamatics. Share this post Link to post Share on other sites
01RUBY500 1,253 Posted April 28, 2020 That’s a bummer. Share this post Link to post Share on other sites
Brian Bertram 17 Posted May 4, 2020 I am the guy that repairs Hondamatics. I am in the Minneapolis area. 8 Share this post Link to post Share on other sites
jeepwm69 7,719 Posted May 4, 2020 9 hours ago, Brian Bertram said: I am the guy that repairs Hondamatics. I am in the Minneapolis area. Awesome! Welcome aboard Brian! Are you still working on the Hondamatics? Share this post Link to post Share on other sites
shadetree 5,969 Posted May 4, 2020 10 hours ago, Brian Bertram said: I am the guy that repairs Hondamatics. I am in the Minneapolis area. welcome !. bout time we got some skill around here..oh wait..we already do !..lol. 1 Share this post Link to post Share on other sites
TRX Student 151 Posted May 5, 2020 On 5/4/2020 at 1:09 AM, Brian Bertram said: I am the guy that repairs Hondamatics. I am in the Minneapolis area. Hurrah! Share this post Link to post Share on other sites
01RUBY500 1,253 Posted May 13, 2020 So I now have a issue and I am looking for some help before I start taking things apart not knowing what I am looking for. My Rubicon when riding In any mode (D1, D2 or ESP) will Go from D to showing all 3 of those modes at the same time And act like it is stuck in what ever gear it is in and won’t shift. It will bounce in and out of this situation. I have discovered that all I need to do to correct it is simply wiggle the shifter a little. The shifter can be manipulated to recreate this even when the engine is off. So not sure where to start looking. Something is loose or sloppy of course so it would seem. The shifter moves about a quarter inch maybe slightly more back and forth in what ever gear it is in making the situation above occur. But this amount of slop has always been there for as long as I have owned it. Also I should mention the thumb button on the shifter has never had any effect in the shifters movement, I can move the shifter with or without pushing the button. There is a little blue microswitch on the bottom of the shifter, I thought maybe It was going bad but it only seems to be activated when the shifter is put into the reverse position. Share this post Link to post Share on other sites
jeepwm69 7,719 Posted May 13, 2020 Wonder if your gear position switch is going bad. My other thought is that the blue switch is bad and intermittently connecting, which is confusing the ECM @toodeep has chimed in on this kinda thing in the past when @basfnb was having trouble with his Rubicon not running right in reverse. Share this post Link to post Share on other sites
01RUBY500 1,253 Posted May 13, 2020 If I hold the shifter forward while riding it does not act up, soon as I let go of it and Accelerate is when it happens the most. I took the shifter mechanism apart cleaned it lubed it & stretched the detent spring and put it back together. Won’t be able to try it until tomorrow. My Service manual has adjustment lengths for the two tie rods that the shifter moves, mine are both off, lower is supposed to be 58-59mm and it measured about 49-50mm. Upper is supposed to be 328-329mm and it measured 333mm. They are not loose so wondering why it is acting up now and not before. 1 Share this post Link to post Share on other sites
01RUBY500 1,253 Posted May 14, 2020 I went thru the tie rod adjustment procedure in my manual and I had to do some Jerry rigging on the shifter to get it to work properly by locking into each position with the push button the way it should. On the trails it seems to be working properly now during a short run in the rain. On pavement it did flicker out of drive very briefly a couple of times during full throttle acceleration only. Full throttle on dirt it didn’t do it. So if it stays like this I can live with it. Share this post Link to post Share on other sites
shadetree 5,969 Posted May 16, 2020 shoulda bought a manual shift !!!..rofl. Share this post Link to post Share on other sites
01RUBY500 1,253 Posted August 12, 2020 On 5/13/2020 at 12:08 PM, 01RUBY500 said: So I now have a issue and I am looking for some help before I start taking things apart not knowing what I am looking for. My Rubicon when riding In any mode (D1, D2 or ESP) will Go from D to showing all 3 of those modes at the same time And act like it is stuck in what ever gear it is in and won’t shift. It will bounce in and out of this situation. I have discovered that all I need to do to correct it is simply wiggle the shifter a little. The shifter can be manipulated to recreate this even when the engine is off. So not sure where to start looking. Something is loose or sloppy of course so it would seem. The shifter moves about a quarter inch maybe slightly more back and forth in what ever gear it is in making the situation above occur. But this amount of slop has always been there for as long as I have owned it. Also I should mention the thumb button on the shifter has never had any effect in the shifters movement, I can move the shifter with or without pushing the button. There is a little blue microswitch on the bottom of the shifter, I thought maybe It was going bad but it only seems to be activated when the shifter is put into the reverse position. Just to update everyone on this issue and to help others out later, this problem came back, and worse then ever. And I was getting very frustrated with it not staying in gear. But the problem is now resolved. Here is what I did to fix it.... First I removed the front & rear fenders so I could get at every electrical connector. Then I unplugged every electrical connector I could find and packed them with dialectric grease and plugged them back in. Next I cleared all of the error codes and a memory clear on the control unit. And last but not least I then did a Angle sensor adjustment. So the problem ended up being electrical, and not mechanical after all. 3 Share this post Link to post Share on other sites
superrman77 68 Posted August 12, 2020 37 minutes ago, 01RUBY500 said: Just to update everyone on this issue and to help others out later, this problem came back, and worse then ever. And I was getting very frustrated with it not staying in gear. But the problem is now resolved. Here is what I did to fix it.... First I removed the front & rear fenders so I could get at every electrical connector. Then I unplugged every electrical connector I could find and packed them with dialectric grease and plugged them back in. Next I cleared all of the error codes and a memory clear on the control unit. And last but not least I then did a Angle sensor adjustment. So the problem ended up being electrical, and not mechanical after all. Glad you figured it out. Share this post Link to post Share on other sites
jeepwm69 7,719 Posted August 12, 2020 Thank you for posting back up with how you solved it as well! Will likely help someone else in the future. Share this post Link to post Share on other sites
dirtslinger24 0 Posted May 22, 2021 On 5/3/2020 at 10:09 PM, Brian Bertram said: I am the guy that repairs Hondamatics. I am in the Minneapolis area. Do you still rebuild them? do you ship parts or only rebuild in house? Share this post Link to post Share on other sites
Tim-ANC 202 Posted May 24, 2021 Power Sports Nation used to rebuild them but I don't see that on their website now. I sold my broken one to a guy on Ebay, he might be a rebuilder. However, don't go for a tranny yet. I replied to you in your other thread. Share this post Link to post Share on other sites
Brian Bertram 17 Posted May 24, 2021 I still assist people with Rubicon and Hondamatic problems. I am located in the St Paul/Minneapolis area. my email address is [email protected]. I also have a listing on eBay for a oil pressure tester. 2001-2003 Honda Rubicon's have the original Hondamatic. 2004-2014 Have the new style Hondamatic (Very few fail) 2001-2004 Have the original failure prone Oil Pumps. (The pressure relief valve sticks open and does not allow for proper oil pressure for the Hondamatic to work properly. This runes the 2001-2003 Original Hondamatic. The 2004's that have the old oil pump and the new Hondamatic seem to survive the low oil pressure problems; I repaired 3 2004 Units last year and was able to just replace the oil pumps. I tool apart the Hondamatic and they were fine. Just last night I took apart a 2001 with a stuck oil pump and the Hondamatic swash plate bearing was failed but the unit still drove. The plastic cage swash plate bearing is not the problem. The 2004-2014 Hondamatic has the exact same bearing. The other failure of the 2001-2003 Hondamatic is one of the pressure relief or check valves in the Hondamatic blow out. I have not developed a fix for this at this time. The metal breaks where the retaining clip hold the valves in. 8 1 Share this post Link to post Share on other sites
Tim-ANC 202 Posted May 24, 2021 @Brian Bertram great stuff. Last year I replaced the tranny in my 2001 with new built in 2012 and a new oil pump. I found these plastic pieces in the crank case and assumed it was bearing cage. What do you think it is? Never took the hondamatic apart because I wanted to leave it as is to sell. Share this post Link to post Share on other sites
Brian Bertram 17 Posted May 24, 2021 Looks like the retainer clip for the pressure relief valve. The pieces might be the bearing cage. If that fails you usually find a lot of metal pieces also. Did you sell the bad Hondamatic? Share this post Link to post Share on other sites
Tim-ANC 202 Posted May 24, 2021 Yes, I sold the old one on ebay. While running, it made an internal chattering noise in the transmission area. It faded at higher RPM Share this post Link to post Share on other sites
dirtslinger24 0 Posted May 27, 2021 Thanks for all the help ya'll, I may just play it safe and complete a full teardown and inspection. If the Hondamatic has bad bearings are those able to be replaced? Share this post Link to post Share on other sites