allison

  1. JG

    New (Bad) feature in 2026 Allison Transmissions

    FYI, new Allison transmissions go into neutral when you stop at a light. When you release the brake after stopping at a light there is about a 3 second delay before the coach will start rolling. If you press the gas beforehand the coach will jerk forward because you are now ramming it into gear...
  2. Putter1

    Allison 3000MH shift to neutral at stop

    We have a 2026 Tiffin Allegro RED33AA with the Allison 3000MH transmission. I am told it has the “shift to neutral” feature. When I come to a COMPLETE stop and then release the brake to start moving again there is a slight hesitation and then a bit if a lurch forward. It is not violent and...
  3. MK

    Allison 6 speed transmission failure

    I have a 2011 Winnebago Adventurer 32h with a Chevy W22 chassis and Allison 6 speed transmission with 66,000 miles expended. The transmission had a complete service at 25k and 49k though each time told it was not necessary, but I like to meticulously perform preventive maintenance. This week...
  4. EV

    2007/2008 UFO vs regular workhorse with push button Allison transmission

    Hi. I know the UFO chassis is popularly known for having issue with the wabsco brake system. I really like this set up with the push button Allison transmission. And I notice some workhorse 07-08 have this set up with front engine with the same parking brake type. Does it have the same...
  5. 472558739_10170415164690055_4589776924961308674_n.jpg

    472558739_10170415164690055_4589776924961308674_n.jpg

    Airstream CLIPPER, Travel on your holiday in luxury.
  6. PO

    allison trans issue

    Just climbed over I-70 in CO. and dropped into Denver. Jumped off the freeway and the old RV WILL NOT shift out of first gear nor will it shift into neutral. We were lucky enough to find a large truck shop to park it. Of course its the weekend and everyone is going home. The old Silverleaf...
  7. MF

    Allison 6spd without any pac/jake brake assist

    I currently have a safari Zanzibar with isl370 with pac brake. I tow a dodge Dakota and drive the Colorado mountains a lot and find the pac brake to suit my needs ( I know it’s not on xmsn) I am looking at downsizing to a 33-35 ft coach, has an isb 300 hp 5.9 with 6 so Allison, but no type of...
  8. CL

    Allison tcm madness

    I know this is a site for the GM workhorse chassis but I would hope yall would help a guy out that has no where else to turn b/c there are no other Allison specific forums on the Internet and My powertrain is the same as can be found in what some RVs came with. So here goes. i have an 03HD chevy...
  9. rvlife_63f5545ace46e

    Allison transmission stuck in "Mode"!

    I have a 2002 Monaco Diplomat, and it won't start because the transmission is not in neutral. It is a 6 speed Allison that has somehow gone into "mode" while sitting for over 6 months. Local Allison dealer won't even come look at it because he has no mobile service. Because of the RV Park we...
  10. BU

    Lost shifter display Allison md3060

    I have lost my display on my Allison shifter and have no gears on my 1993 Monaco dynasty and my power leaveling.i checked powers and ground bars ,fuses .i have 6 relays under the bed with lots of circuit breakers from what I have found is the most forward relay is the ignition relay.i opened the...
  11. GO

    Allison 2500MH Issue - Coach won’t start

    Starting this thread hoping to get some advice on next step before pulling the transmission pan. 2017 Coachmen Sportscoach on 2016 Freightliner XCR chassis / Cummings ISB 6.7L diesel pusher with Allison 2500MH Gen IV (no prognostics readout) shifter. Returned from a trip with no noticeable...
  12. RN

    Allison 3000MH drain plug

    Has any used Fumoto drain plug on their 3000 tranny? Fumoto has couple of M12-1.75 options.
  13. TH

    2002 Freightliner Thomas

    Hello, I'm selling my bus. I'm moving home and can't keep my bus where it is, I've prepared the bus for a roof raise. $10,000.00 OBO Info: 2002 Thomas/freightliner 71 passenger school bus 6.4L Cummings Engine/Allison Transmission Tires are good, air breaks and hoses replaced 2022. Runs well, no...
  14. KB

    1999 Blue Bird TC2000 8.3 L 505 CID L6 Cummins 40ft Off-Grid Skoolie - $55,000 (Austin, TX)

    INCORRECT PRICE IN TITLE CORRECT PRICE IS $75,000 OBO MUST SELL FAST — Motivated seller, priced below value! Live the off-grid dream! This professionally converted Blue Bird skoolie is a fully functional tiny house on wheels with tens of thousands invested in mechanical repairs and premium...
  15. Billjolene

    Allison transmission selector goes blank

    2015 Tiffin 33AA. Selector panel does not light up when starting. Fuses have been changed. Now coach won’t start. Displays a CODE J 1939, NO DATA. Thank you to anyone with any knowledge. Tiffin closed over 4th as it should be. But never fails something happens of this magnitude on holiday...
  16. marks71

    Allison diagnostics using shift stalk

    Hi. Just moved from a Dutch Star to a 2025 Explorer 40 ERB. On the Dutch Star, I would check transmission fluid using the up and down arrows on the Allison side panel. Now that the shifter is on a stalk, how do I accomplish the same thing? I can not find in the Cascadia manual Thanks M
  17. GR

    Buying my first bus!

    Hey! I’m pretty new to the idea of school bus life and I’ve been trying to educate myself a bit but would love as much advice as possible! I was planning on saving up to buy for a bit so I would also have savings to get started on the conversion. Basically I’m in no rush right now! However I...
  18. MR

    Allison Mode?

    My apologies if this has been asked/answered in the forums, but I did several searches and couldn’t find anything. I recently bought my first diesel pusher and don’t understand what happens when you switch to the MODE feature on the Allison transmission. I’ve only used it when highway...
  19. EV

    Monitoring the Allison transmission fluid on my 2007 gas rear engine?

    Hi I have a scan gauge 2 and I’m trying to monitor the transmission fluid temp but it won’t work. Does anyone have any other device or ways that you monitor your trans fluid temp on your Chevy 8.1 with Allison trans? *2007 ufo chassis Chevy 8.1 Allison trans rear gas pusher TIA.
  20. EV

    UFO chassis Allison 2000 fluid capacity?

    Hi I’m attempting to replace the transmission fluid and filter on my 2007 ufo chassis Chevy 8.1 with Allison trans. Looks like it has a drain bolt on the pan similar to engine oil pan and a small spin on filter. Does anyone know how many quart of fluid does it hold and is it ok to pump the...
  21. TY

    2003 Pace Arrow 36G Allison 1000 Limp Mode

    Recently purchased a 2003 Pace Arrow 36G from a friend of mine. As soon as leaving transmission went into Limp Mode. Rv was sitting for 8 months and shifted fine before hand. I am getting code for Pressure Solenoid A. Heavy Duty Repair shop has replaced all Solenoids. Rebuilt and flashed the...
  22. MA

    Allison Transmission Question

    Good day, New to me a 2008 Tiffin Allegro Bay 35TSB, Cummings I6 6.7, 6 Speed transmission with overdrive. Couple questions? When driving, the transmission smoothy shifts through the gears till 5th, at 62 mph, it is revving just below 2000 RPM, does not seem to shift into 6th or overdrive...
  23. JE

    Dipstick vs Allison level check

    Changed the tranny fluid and filters on my 3000 today. When I got done filling the tranny with 19qts of TransSyn 668, the dipstick said it was good cold. Having just learned about the keypad method of checking the level, I tried that. Tranny temp at 145, it reported 3qts low. I added the last...
  24. JE

    OEM Allison filters

    There are so many counterfeit filters out there these days, that I worry about buying from anyone other than the OEM or my chassis maker. And I'm willing to pay the $250 to get the filters for my 3000MH tranny from Spartan. I have no trust at all that the "look alikes" on Ebay for $50 are...
  25. Idleup

    Explorer DT12 Allison Victron In-Depth - Mike Mas

    Explorer DT12 Allison Victron In-Depth - Mike Mas Hello IRV2 Renegade Members - After studying Renegade’s Cascadia Explorer, with its powerful Detroit DD13 engine & Allison 4000, last year I finally pulled the trigger on a 2025 Explorer ERB. Having owned almost every type of RV and bus chassis...

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