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    1. Introduction Forum

      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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      This is a forum for you to tell us about your truck's history! Every old truck has some type of story behind it and we would love to hear about it! Be sure to include photos if possible...

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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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      This forum is for Mack Dealers and Mack Corporate personnel only. If you are a Mack Dealer, or Mack Employee, PM the forum moderator below with your name and dealer code and you will be moved to the Dealer Group and be able to participate in this forum.

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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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    5. Mack on the Silver Screen

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

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    6. Mack Scale Model and Diecast Corner

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

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  3. Specific Topic Forums for Antique & Modern Trucks

    1. Engine and Transmission

      This forum is for engine and transmission related topics

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    2. Driveline and Suspension

      This forum is for driveline, carrier, front and rear axle, steering and suspension topics

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    3. Air Systems and Brakes

      This forum is for Air System and Brake related topics

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    4. Electrical, Electronics and Lighting

      This forum is for electrical, lighting and mobile electronics topics

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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

    1. Odds and Ends

      This forum is for non-truck related topics. Talk about interesting web sites, current events, tell jokes, post funny photos...etc.

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    2. Trucking News

      News and information from the entire trucking industry

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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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  5. Market Place

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    3. Feedback Forum

      Please leave feedback for other members you have done business with here. This will help members trust (or not trust) other members. Please be professional with your remarks...good or bad.

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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   (232,401 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

    1. Site Related Topics

      This forum is for BMT related comments, suggestions or problems.

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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

    • Bluebulldog
      Dash switch

      By Bluebulldog · Posted

      Thank you.   We bought this last summer for a farm truck that my daughter could or all help for that matter could help move corn.  I’ve got a nice 613 that I like but boy this thing really rides and drives nice. I like the fact that every one can get in it and it will work the same. Just can’t rough house it like you can a manual.   It has the fleet shift pad I may take it and have that upgraded just to have some choices how it comes out of a field loaded.   
    • The Rubber Duck 006
      Dash switch

      By The Rubber Duck 006 · Posted

      That's Mack’s Brake leash. Your high low switch is above and that switch is to set the max Mph when you want it to kick in. Next time you're driving set your cruise and turn your engine brake on then hit that button. It should come up on your dashboard Screen "Brake leash" and it will have what speed you want it to come on at and what speed you want it to bring you back on to. Sorry I'm a little late for the party on this one. Example : Truck is governed at 70mph so cruise is set at 70mph Then Brake leash Parameters are Set at say Top speed 73 and the engine kicks on The speed lowest is 70mph so when the truck gits back to 70mph the engine brake shuts off. Basically a Volvo thing put in a mack truck especially in Automatics. Hope that helps I've driven several with the Indestructible M drive!! Very good Transmission especially with the right HP out front. 
    • Joey Mack
      300+ rebuild

      By Joey Mack · Posted

      Yes
    • terry
      300+ rebuild

      By terry · Posted

      So would P2 be only two thousands?  terry
    • Joey Mack
      300+ rebuild

      By Joey Mack · Posted

      It is supposed to say "P20" not P2.. I hope they work with you..
    • Joey Mack
      Dash switch

      By Joey Mack · Posted

      Ok.  Could be.. i have been away from those models for 7 years or so and have forgotten a lot... 
    • Freightrain
      300+ rebuild

      By Freightrain · Posted

      WTF..... So I pull a liner kit out and start to inspect the pieces (liner, piston, rings, pin).  I take it over to the block to test fit liner.  It slips right down into block!!!  😲😲😲😲😲 Apparently they sold me std OD liners.  🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦 Guess that is why I got that itchy feeling when a "new guy" took my order.  Yup, got screwed over.  The box is marked "no return if open".  They better!!!!!!!!!!! Can anyone decipher the part number?  It isn't at +.020 liner that's for sure.   Ugh ...time for a phone call monday morning.  Dammit anyway.  
    • Bluebulldog
      Dash switch

      By Bluebulldog · Posted

      I think that is on the 3 position engine brake switch.   Off high and low.   Read somewhere it adjusts like the differential between cruise settings and when the brake comes on coasting down a hill but really have no idea.   

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    • Lmackattack

      Lmackattack

      HO HO HO

      · 0 replies
    • the_IRFmack

      the_IRFmack

      - I double sticked and old Mack to feed a stone crusher in 12 and 14 hour shifts six days a week all summer to pay for my chemistry degree.
      - Because I wanted to sleep for 1 min and 26 seconds each trip out of the quarry at the crusher's vibratory dump box at the top the quarry during those 12 hour shifts, I bulled the old MACK up long 20 degree and sometimes steeper grades.
      - THAT meant that I split each gear 1, 2, 3 after coming out of boggy low.
      - All I did was rev to the right engine note, reach my left arm down through the steering wheel to hold the curve I was on or hold the truck's path steady; slip out of 1st, throw the 2nd stick high into low and slip into 2nd gear... rev to the right engine pitch, slip to high.
      - Then when it was time, reach through the wheel again, slip high to low and 2nd to 3rd {if I correctly remember 60 years ago}.
      - The Igneous rocks were too heavy and the grade too steep for me to ever get into 3rd high.
      - The crusher team were the mechanics for everything and had replaced the old Mack's tranny gears because they had been ground too much. - - They later told me they didn't believe me when I told them I slipped all my shifts because the gears showed no wear.
      - Except for start and stop; Not once did I use the clutch because that made my leg ache too much after an hour or so.
      - I slipped all my standard 4 speed shift vehicles all my life...just to be with the music of the engine and car or truck.
      · 0 replies
    • the_IRFmack

      the_IRFmack

      - I hardly ever change disc pads or brake shoes because I always slipped my gears downshifting...
      _ I learned that because the synchro rings got shot on my 1968 Volvo 122S 2-Door 4-Speed with an electric overdrive because I stupidly speed shifted and ruined them. https://bringatrailer.com/listing/1968-volvo-122s-17/
      - [Note: That Volvo's original owner was a Canadian Submarine Captain who rallied it and that is why it had Volvo's unique electric overdrive.]
       
      - {I clear coated over the bone white with Cadillac Firemist Green and painted the grills Black because they were dented...gosh it was stunning.}

      · 0 replies
    • Richie s

      Richie s

      My phone number is 845 475 7176 if anyone can help with parts
      · 0 replies
    • Richie s

      Richie s

      I have no idea what I'm doing with this stuff I'm using my phone but I need a Jake for my truck 
      · 0 replies

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