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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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    2. Truck Stories

      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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    3. Mack Dealer & Corporate Forum

      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   (232,439 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

    • BottleHauler84
      300+ rebuild

      By BottleHauler84 · Posted

      Right.  I use alot of Cat parts because its mainly what I run and I've seen several parts with China stamped on them. Eventhough i dont like that, I also know that those parts are supposed to made to the OEM specs and standards.  So far I cant say I've have any issues.  Eaton is the same. Alot of India, China, other countries stamped on their gears and various other parts.  I know it doesn't always mean its better but I just like seeing Made in USA but we dont see that very often anymore obviously. 
    • Geoff Weeks
      300+ rebuild

      By Geoff Weeks · Posted

      I have no hard evidence either way, but suspect OEM's design and build some prototype items in house then contract to another company that say, make cyl liners to make them to the OEM specs for production. Pistons may be made by Mahle, a big piston mfg, for the OEM and then make aftermarket pistons to sell.  I know with Cummins, if you want the most up to date design, you need to buy OEM but the previous design will show up in the aftermarket. You can get good quality in the aftermarket, and you can get junk, you might even get the same item sold by the OEM with an aftermarket branding. As far as roller bearings, Timken comes out of Asia now, not Canton, OH. Mack likely contracted to one of the big bearing mfg to make their "branded" bearings.
    • terry
      300+ rebuild

      By terry · Posted

      I have bought wheel bearing outer races right from mack and races said made in china   terry  and that was alot of years ago, probably worse now
    • BottleHauler84
      300+ rebuild

      By BottleHauler84 · Posted

      Ive heard that there's quite of bit of Mack O.E. stuff is just PAI rebadged as Mack. I cant say I've seen it personally yet, but it does make you wonder.
    • Geoff Weeks
      300+ rebuild

      By Geoff Weeks · Posted

      3rd world is where the demand is for older engine parts. They are still running stuff that is considered too old here. Ran into the same problem working on a 30 year old Kubota, Kubota doesn't show any parts in the system, plenty from India and the rest of SE Asia.
    • Geoff Weeks
      Air compressor question e7

      By Geoff Weeks · Posted

      Bendix's method of timing the time the compressor is compressing vs off time is the most accurate. It is hard to tell when the compressor starts compressing esp sitting in the driver seat. Timing the time between drier blow-off rolling down the road at a constant highway speed is a good approximation, and easy to hear from the drivers seat on most trucks.  You can also watch the pressure gauges. If the go to cut-out pressure and never move, but the drier keeps cycling, the leak is between the compressor and wet tank (inclusive). If one gauge drops to cut-in while the other stays higher, then look at that side of the duel line system. If both drop, (esp if towing a trailer) it could be the trailer that is leaking. All trailers  are "single line" brake system that can be fed from either the primary or secondary side of the tractor brakes. 
    • Geoff Weeks
      Air compressor question e7

      By Geoff Weeks · Posted

      Ahh, that is what you are going to have to find. My best truck, air ride truck, air ride trailer, air wipers, air start, fully loaded on the interstate would go 45 min between blow off of the air drier. My worse truck was around 15-20 min. The differance between the two most likely had to do with the best used nylon air tubing and the other used airquip hose.  Every hose, every fitting and valve are potential leaks. Not a fun job tracing them all down. Bendix says 25% duty cycle, meaning the compressor is compressing 25% of the time MAX. (high use is 25% low use is 15% between those two is normal) That is you time the when the compressor starts compressing till when it stops, then time to when it starts again.  Put the 1st number of minutes over the 2nd and the result should be less than 0.2.  Stop and go driving is going to use more air, but if you compressor is already struggling to keep the system up, it will be running continuously in stop and go traffic. You'll notice that intake pipe is clamped to the rear head to keep it tight to the fittings at each end.  Your pictures don't show a tube/pipe anywhere near the head.
    • mcratchet1
      Air compressor question e7

      By mcratchet1 · Posted

      Ok is the reason leaks? Which would make it cycle more often

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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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