conway carriage Posted December 15, 2010 Share Posted December 15, 2010 I've got the Mack 18 in a ch613. Syncro is grinding from high range to low. works fine low to high. Dealer told me they needed to pull the "A Box" and I couldn't do it because I wouldn't have the tools to keep the counter shafts from falling out. Anybody know about this??Adam Quote Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/ Share on other sites More sharing options...
theakerstwo Posted December 15, 2010 Share Posted December 15, 2010 You can pull it but cant get it back in with out the counter shaft support plates to hold the shaft in place. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68590 Share on other sites More sharing options...
rhasler Posted December 15, 2010 Share Posted December 15, 2010 You can pull the whole transmission and stand it vertically, pull the range case off and replace the parts, if you don't mind pulling the transmission. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68592 Share on other sites More sharing options...
bubbamobilin Posted December 16, 2010 Share Posted December 16, 2010 You can pull the whole transmission and stand it vertically, pull the range case off and replace the parts, if you don't mind pulling the transmission.This is the easiest way. Take an 22.5 Dayton rim and stand the trans on it's nose. It works perfectly. Done it many times with 2090 Mack 9 speed transmissions. Quote Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68597 Share on other sites More sharing options...
rhasler Posted December 16, 2010 Share Posted December 16, 2010 This is the easiest way. Take an 22.5 Dayton rim and stand the trans on it's nose. It works perfectly. Done it many times with 2090 Mack 9 speed transmissions.A junk SAE #2 flywheel housing also work quite well, if you're fortunate enough to have one laying around. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68598 Share on other sites More sharing options...
Rob Posted December 16, 2010 Share Posted December 16, 2010 A junk SAE #2 flywheel housing also work quite well, if you're fortunate enough to have one laying around.Did Mack get away from using an SAE #1 housing predominantly?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68599 Share on other sites More sharing options...
theakerstwo Posted December 16, 2010 Share Posted December 16, 2010 sae#1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68600 Share on other sites More sharing options...
rhasler Posted December 16, 2010 Share Posted December 16, 2010 Did Mack get away from using an SAE #1 housing predominantly?RobNo, still #1 Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68601 Share on other sites More sharing options...
joes mack Posted December 16, 2010 Share Posted December 16, 2010 if you have a torch and some spare 3/8 metal you can make the countershaft suport plates. cut the first plate with a hole big enough for the rear of the countershaft to clear and cut a hole in the second plate to screw a bolt to the countershaft to hold them in place. or you can find some spare plates off of a old trans and drill a hole in them so you can screw a bolt into the countershaft to hold them. thats the way we did it where i used to work. its a lot cheaper than buying the special tools and works just as good... joe Quote Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68606 Share on other sites More sharing options...
conway carriage Posted December 16, 2010 Author Share Posted December 16, 2010 Ok 22.5 dayton I have. Never opened one up, just swapped them out. Am I just removing the tail shaft piece or ??? Might be time to do clutch anyway, she ok but has the miles.Adam Quote Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68615 Share on other sites More sharing options...
RowdyRebel Posted December 16, 2010 Share Posted December 16, 2010 Ok 22.5 dayton I have. Never opened one up, just swapped them out. Am I just removing the tail shaft piece or ??? Might be time to do clutch anyway, she ok but has the miles.AdamThe real price of a clutch is the labor...not to mention the hook to get it to a shop...plus the down time, which probably won't happen when it is convenient to you. If the truck is going to be down anyway, and you are already doing the labor as part of another job, I'd just go ahead and do the clutch too...especially if he miles on this one are up there that you think it'll be needing to be done soon anyway. Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68626 Share on other sites More sharing options...
conway carriage Posted December 17, 2010 Author Share Posted December 17, 2010 Too true. might as well pull it. Hope she hold out till after Christmas!!!Thanks everyoneAdam Quote Link to comment https://www.bigmacktrucks.com/topic/16875-mack-18spd/#findComment-68639 Share on other sites More sharing options...
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