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      Welcome to the New BigMackTrucks.com Forums! Take a minute to create a new post here and introduce yourself. Tell us a little about yourself and your passion for old iron!

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  2. General Discussions

    1. Antique and Classic Mack Trucks General Discussion

      This is where you can talk about anything related to antique or classic trucks! If your topic is something specific, try to use the correct forum below.

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    2. Modern Mack Truck General Discussion

      This forum is for general discussions about modern Mack Trucks! Granite, Vision, Rawhide, Pinnacle...etc. Specific topics can be posted in the forums below.

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    4. Mack Truck Q & A

      This forum is for pressing questions concerning Mack Trucks...emergency maintenance questions, pre-purchase questions, etc...answers can be rated by users and the higest rated answers will show first!

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      This forum is for discussing various TV shows, commercials, music videos, songs and movies that had Mack Trucks in them!

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      All discussions about Mack scale model building and diecast models go here!

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  3. Specific Topic Forums for Antique & Modern Trucks

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    2. Driveline and Suspension

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    5. Exterior, Cab, Accessories and Detailing

      This forum is for topics about exterior, cab, paint, trim, bumpers, emblems, visors and also topics about keeping that truck looking its best!

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    6. Fire Apparatus

      Forum for discussions about Fire trucks and specialized fire fighting equipment.

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  4. Odds and Ends

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    2. Trucking News

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    3. Other Truck Makes

      This is the place to show off all your other trucks that are not Macks. They can be antique or modern trucks.

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    4. Tractors and Equipment

      This forum is for you to talk about Farm Tractors and other misc. equipment such as trailers, dozers etc.

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    4. Transportation Board

      This forum is for posting and finding transportation opportunities for your antique hobby trucks and parts around the country. Please keep rates reasonable when posting a route...

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    5. Watt's Truck Center   (222,976 visits to this link)

      Click here to visit the Watt's Truck Center Home Page featuring The B-Model Store and tons of other parts for Antique and Classic Mack Trucks including R-Models, Super-Liners, DM's and all current models!

    6. Product Announcements & Group Buys

      This is the forum where we will post new product announcements and Group Buy Information from the B-Model Store! You can discuss them and/or ask any questions you may have here.

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  6. Shows and Events

    1. Truck Shows and Events

      This forum is for topics about truck shows and other events of interest.

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  7. Site Related

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    2. BMT Wiki Support Topics

      This forum will hold the support topics created from the Wiki System.

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    3. Test Forum

      This is the place to practice posting photos or testing code. Topics may be removed at any time...

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  8. Club Forums

    1. Mack Trucks Memorabilia Collectors Club Topics

      This club page is for all Mack Memorabilia discussions

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  • Latest Posts

    • Geoff Weeks
      Rear mount PTO

      By Geoff Weeks · Posted

      The type I think is supposed to have is what I have heard termed "vari-rate" spring pack, with a main pack and an aux pack above it, the top leaf on the main has the eye on one end to take the torque load. Very common single rear suspension. edit: may not be the top leaf, but one of the leaves in the main pack has the eye on one end.
    • Mackman87
      Rear mount PTO

      By Mackman87 · Posted

      Lol, old dude I bought this truck off a couple years ago was a farmer. No offense to farmers but they don’t seem very committed to putting it back right, more of just make it work kinda situations.
    • Geoff Weeks
      Rear mount PTO

      By Geoff Weeks · Posted

      Yeah,I saw the spring and thought "what the heck is going on here" but don't know Macks all that well, and don't claim to have seen everything so didn't say anything.
    • Mackman87
      Rear mount PTO

      By Mackman87 · Posted

      you are correct, one portion of the tank (larger portion is primary tank and smaller portion of tank is secondary. It has a small tank inside rail of frame for air compressor relief valves and governor psi. I do have a couple of nice small tanks off a late model RD that I could use, but back to your question, I’m not sure if it would supply the right amount of volume with out breaking out the calculator to do some un welcomed math.lol. I could pretty easily do the two tank mount and leave primary on drivers side and move secondary (I believe, maybe I have that reversed) to passenger side with a small amount of re routing lines.    It’s a single axle, the picture with the axle under the truck is the way it was when I bought the truck. It’s some kind of home made setup. The trailing bar set up was used with mack hangers. Which isn’t correct as mack hangers need an eyelid spring pack to be correct. The truck had the open hook on both ends of spring. This was causing drive line shift and vibrations and the trialing arm was some kinda home made deal. I’m going back with correct spring and pins and remove trailing arm all together. 
    • bgblk1968
      MP7 Flywheel Problems

      By bgblk1968 · Posted

      2011 MP7 with Eaton Autoshift engine went bad. Trying to put MP7 out of 2015 that had a MDrive in. The flywheel interchanges but will not let transmission go all the way in. Likes about an inch before going flush. Seems like pilot bearing is not deep enough in flywheel. Do mdrive and Eaton use same gear housing? What am I not seeing?
    • 96bulldogpower
      2012 MP7 regen will never end

      By 96bulldogpower · Posted

      Sorry guys I’ve been absent from the site for a while, just wanted to follow up on my findings.  a little background on the truck, we bought the truck originally inop from auction. Found it to have a bad PCM so we replaced it and the truck ran great.  Fast forward a couple of months into service and we had this issue happen.  The truck could never complete a regen. We eventually got the truck back to our shop where we could properly diagnose it. We removed the dpf to inspect it and found our problem, it had been hollowed out, the old pcm was deleted and we had no clue.  We replaced all emissions components and reset parameters on PTT and life has been good since.   Just figured this info could help someone in the future, if your truck never finishes its regens and all else looks good, take a look physically into your dpf.  
    • Straydog954
      E7-250 hp Q

      By Straydog954 · Posted

      Hello everyone. To go to 350 with this engine is it just turbo and injectors change? Also apparently this engine has an air throttle. Can a mechanical pedal rod be hooked to this inj pump easily?
    • mowerman
      Young Guy, Old Mack (B61 Dump Truck)

      By mowerman · Posted

      Is that a 9500 hiding???? 

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    • Joey Mack

      Joey Mack

      https://www.ebay.com/itm/335977440629?_skw=mack+e-tech+engine+book&itmmeta=01JWA20VWGWWKW84MXA7SPSVRS&hash=item4e39d0e575:g:fUEAAOSw~n9ncrwC&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1dw4WewTekYgqfyNRuEV27xatvWtbt3pHWRVGQe1%2FuiJa1RXu7clyGRSUOQsiJw2vkNZsCj2oCM0P%2FFfzicknbJ1jIfvRTaeEwAuEcAvnENHMOemQfy4z6CxAOg99H0CnBQ9VW5EziMtlSRPRkvE81SM8Z%2FUbIxgXyjlUqWNlPuqLRMliIAbmsBP3PTti0ZA8IFxHf9n2peaIf5BC4NH3pXsXiboMiV%2FMHZZWAulEsSdv3ivPWd6jwPksv6HdtaD5SBBgzXSe4hxqy9vF2g39rCKjthzr7%2FBmBw7UN0Qu2Jbw%3D%3D|tkp%3ABk9SR7C-g8LiZQ
      Stoneandsteel... You need this book!
      · 0 replies
    • down4glamis

      down4glamis  »  Mike6024

      Hey Mike! Sorry to bug ya on here, I just bought a pallet of wine in Napa and think you may have done the same. I bought the blue label and it said you won the yellow label. I was wondering if you would be up for trading a few cases so we arent stuck with so many of just 1 type of wine?
      · 0 replies
    • StoneandSteel

      StoneandSteel  »  Joey Mack

      Quick question on the advice you gave me about my ai400 cam/lifter replacement kit. 
      would you have a rough estimate on the time it would take to do the actual replacement with kit? I have everything removed I’m just ready to open up the front of the engine and get to the cam. Thanks 
      · 15 replies
    • TurdFerguson

      TurdFerguson

      Looking for jake adjustment screws for E6 300 2 valve Jacobs number is 2034 Mack number is 4559-2034. I would really like 12 but would take six.
      · 0 replies
    • jefferydixonsr

      jefferydixonsr  »  h67st

      Hi I have a 1969 685t r model mack  I'm looking for the front axle spin on hub oil caps if someone has some that they want to sale or know where I can get some I know the old b model had the same thing that thread overfront hub or spock if you can help me out thanks 
      · 2 replies

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