cowboy jeff Posted June 16, 2023 Share Posted June 16, 2023 Everything was working fine. I pulled over for 30 mins of party time with my Pomeranian. We leave and shift through the bottom 5 gears like butter. But whenever you flip the plunger nothing happens? Any ideas? Quote Link to comment Share on other sites More sharing options...
doubleclutchinweasel Posted June 16, 2023 Share Posted June 16, 2023 Mack or Eaton box? Well, there are several pieces in that system (Eaton is in my mind...Mack probably similar). Air regulator. The range selector on the stick. The slave valve on the side of the trans. The piston on the range shift. Any of them can cause a problem. The slave valve has a plunger in it that only allows air to pass through while the box is in neutral. Not sure if those are prone to sticking. Maybe start at the incoming line and see how far the air makes it. Or start in the middle (stick) and see if air is making it that far. There are guys on here who will have better troubleshooting tips for you. Sounds like a good one for FJH. Or Mackpro. Or Joey. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
Joey Mack Posted June 20, 2023 Share Posted June 20, 2023 You say that there's nothing when you flip the button up?? Any chance a spaghetti line is kinked.. ? Do you hear any air in high range? My guess is it's an Eaton FRO 16 210C... Quote Link to comment Share on other sites More sharing options...
Solution cowboy jeff Posted June 30, 2023 Author Solution Share Posted June 30, 2023 It's a mertinour transmission and it was a broken wire inside the fuze box on the firewall Quote Link to comment Share on other sites More sharing options...
cowboy jeff Posted June 30, 2023 Author Share Posted June 30, 2023 No air lines at all into the cab. Only wires Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted June 30, 2023 Share Posted June 30, 2023 Well there you go.. Nice repair.. I have no real Knowledge of Meritor tranny's in Mack's.. Only seen a few.. It's great that you got it fixed.. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted June 30, 2023 Share Posted June 30, 2023 Sounds similar to the short lived Eaton Fuller Lighting transmission . Manual transmission with electric high/low range shift. Helped in saving the range synchronizer from idiot steering wheel holders but reliability suffered from failures with wiring and the range shift controller that bolted to the back of the trans. I think it was even water cooled. Only saw them a few years back in early 2000’s. 1 Quote Link to comment Share on other sites More sharing options...
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