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    3. Other Truck Makes

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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   (221,736 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

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    3. Test Forum

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  8. Club Forums

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  • Latest Posts

    • Geoff Weeks
      TRL-107 gear ratios?

      By Geoff Weeks · Posted

      Not the main shaft itself, but the gears that are on it are floating, the countershaft keeps them centered over the shaft. Being "pretty sure" doesn't cut it. That is why I posted a picture from the Fuller Roadranger manual. I have no idea on a Mack triple counter shaft trans, how they do it, Jo-Jo could chime in on that. The main shaft except the nose (where there is a bushing between it and the input shaft, is splined the whole length with grooves tangentially for snap rings to hold the fore and aft position of the gears, The clearance between the gears and main shaft are maintained by the gears on the two countershafts. If the counter shaft or its key gets a twist, the gear on the main shaft gets out of line and it can be difficult or impossible to get into that gear. It is one of the 1st things to check on overhaul. A bushing riding on a splined shaft would have an extremely short life.
    • skydawg
      Time to fix up the R600

      By skydawg · Posted

      I like the look of the pintle area,gives a finished look,and is different from the usual treatment.
    • Mark T
      TRL-107 gear ratios?

      By Mark T · Posted

      Mainshaft gears in a Fuller have the round part on the other side of the clutching teeth that ride on the shaft or just the inner teeth that are against the mainshaft (yes they float on there and are shimed into position front to back) . The input shaft ??? I'm pretty sure there's a bushing in there where it goes into the mainshaft. Which is where it makes the mainshaft assembly able to turn as per gear selection.  None of the mainshaft assemble relies on countershafts to support it's centerline. 
    • mowerman
      Time to fix up the R600

      By mowerman · Posted

      Nice going bud thanks for the updates and I have shit sitting around here. I bought for mine way longer than seven years ha ha let’s keep it up very hard to do anything on these things when you’re still working…. Bob
    • Geoff Weeks
      Time to fix up the R600

      By Geoff Weeks · Posted

      I count 4 air filled tires!
    • 66dc75
      Time to fix up the R600

      By 66dc75 · Posted

      The more I think about it I'll probably just change the gearing.  I actually would like to keep the spokes. It would be a whole lot cheaper and I am a cheap bastard. It would  be nice to have airride though.
    • Geoff Weeks
      TRL-107 gear ratios?

      By Geoff Weeks · Posted

      The main shaft is supported front and rear on bearings, the GEARS loaded on the main shaft aren't bushed to the shaft, and are floating, When a dog clutch is moved into the inner spline on the gear and the outer spline on the main shaft then it is locked on the main and power is transmitted. There is no smooth bushing between the main shaft gears and the main shaft on a Eaton or Spicer. There are no places for a bushing on the main shaft nor the gears, they are held in position by the timing of the countershafts, There are snap ring to keep the gear from moving fore and aft on the shaft but no bushing or bearing because they do not bear on the shaft. When that ratio is selected the dog clutch engages with the internal spline on the gear and the clutch is splined to the main shaft. When not selected the gear floats off the shaft being held in position by the counter rotation of the countershaft gears. show me the bushing in this picture! correction, there is one bushing in the input shaft that "supports" the main shaft, but that shouldn't  be seeing any load to speak of, unlike a single counter shaft trans, that normally use a bearing in that location of some kind, but still no bushing or bearing between the main shaft and its gears.
    • Mark T
      TRL-107 gear ratios?

      By Mark T · Posted

      If you're centering your mainshaft with the countershafts ????  you have bigger problems than how many countershafts there are. Fullers are timed cause of the cuts for where they're keyed for the gears on the countershafts. Countershafts are either welded fast or keyed and press fit. Mainshafts "float" but are still centered by their bearings and bushings. Their centerline relies on the bearings and bushings . Other than the being loaded up by torque, they are not supposed to do much but mesh with and drive the countershaft(s)   One countershaft miss'n from a Maxitorque ??  on highway, somewhat low power ??  never miss it and probably a little easier to shift.

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    • 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
    • mackmike01

      mackmike01

      I recently purchased a 2005 mack granite cv713 dump truck. 
      Problem one: I only get a check engine when it idles for more then 10 mins and they are all low/shorted/open circuit codes. 
      Problem 2: the truck pulls a load with great power until 4th and especially when I kick it in high range. The truck will pull good and then acts like I reduced to half throttle. No smoke or anything. Then I will hold it at the floor and it will kick in to full power again.  It goes on and off when it wants. Might stay full power. Might not, until I get a load off it(go down hill or flat)
      · 0 replies
    • mowerman

      mowerman  »  Christopher 2025

      Hey,welcome  aboard bud have a ball.. bob
      · 0 replies
    • Mack_man

      Mack_man  »  Joey Mack

      whos going to mack days i might bring my superliner
      · 2 replies

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