Laser Posted October 2, 2022 Share Posted October 2, 2022 2006 mack granite cv 713 427 18 speed trans.. when shifting from 2nd to 3rd and 3rd to 4th the truck grinds in-between the shifts have to pull truck over to a stop it’s so bad believe it’s coming from transmission. any help would be appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/ Share on other sites More sharing options...
fjh Posted October 3, 2022 Share Posted October 3, 2022 On 10/2/2022 at 2:35 PM, Laser said: 2006 mack granite cv 713 427 18 speed trans.. when shifting from 2nd to 3rd and 3rd to 4th the truck grinds in-between the shifts have to pull truck over to a stop it’s so bad believe it’s coming from transmission. any help would be appreciated. So it sounds like the range clutch pack could be toast ! ARE YOU PRESELECTING THE RANGE SHIFT? MANDITORY Bro! I or are you are grinding on the split 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-510961 Share on other sites More sharing options...
Joey Mack Posted October 3, 2022 Share Posted October 3, 2022 when this happens,,, are you splitting the gears Lo-Hi or gear to gear?... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-510962 Share on other sites More sharing options...
Laser Posted October 4, 2022 Author Share Posted October 4, 2022 Just floating from gear to gear no splitting Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-510986 Share on other sites More sharing options...
Laser Posted October 4, 2022 Author Share Posted October 4, 2022 13 hours ago, fjh said: So it sounds like the range clutch pack could be toast ! ARE YOU PRESELECTING THE RANGE SHIFT? MANDITORY Bro! I or are you are grinding on the split Grind happens when shifting floating from 2to3 and 3to4 not splitting and yes I am preselecting up or down in the gear before shifting if that’s correct Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-510987 Share on other sites More sharing options...
Joey Mack Posted October 4, 2022 Share Posted October 4, 2022 Does it do the same thing on the High side? Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-510990 Share on other sites More sharing options...
doubleclutchinweasel Posted October 4, 2022 Share Posted October 4, 2022 Something wonky in the air system, causing the range shift or the splitter to try to shift unintentionally? Pinched/cut air line? Bad piston seal? Bad valve? JoJo and FJH can work miracles for you, if you can give them enough info to work from. If it works right in hi range, that might be a clue. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511003 Share on other sites More sharing options...
Laser Posted October 4, 2022 Author Share Posted October 4, 2022 No not on high side Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511010 Share on other sites More sharing options...
Laser Posted October 4, 2022 Author Share Posted October 4, 2022 Thank you will look for air supply problems Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511013 Share on other sites More sharing options...
doubleclutchinweasel Posted October 4, 2022 Share Posted October 4, 2022 F? JoJo? Thoughts? You know that system WAY better than I do. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511014 Share on other sites More sharing options...
Joey Mack Posted October 4, 2022 Share Posted October 4, 2022 (edited) The thing is... If it does it on the low side and not on the high side. We need to look at other issues than air. He is not using the gray button to split the gears, and 2nd - 3rd. Is the same stick position, as 6th-5th. I would love to test drive it. I hate to make a piss poor comment, but is it possibly operator error? I'm on thin ice here... Is this truck new to the driver? Did you come from an Eaton tranny to a Mack 2018? Another thing too, have you checked the out put yoke on the tranny to see if it is loose? With respect, Jojo Edited October 4, 2022 by Joey Mack Poor sperring Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511018 Share on other sites More sharing options...
doubleclutchinweasel Posted October 4, 2022 Share Posted October 4, 2022 I just wondered if there is something in the air system that could be causing it to try to go to hi-range when there is no load on the trans. Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511020 Share on other sites More sharing options...
fjh Posted October 4, 2022 Share Posted October 4, 2022 3 hours ago, doubleclutchinweasel said: I just wondered if there is something in the air system that could be causing it to try to go to hi-range when there is no load on the trans. We found the range pack would fail on the low side more often than not! Also check the trans yoke bolt for tightness they some times work loose! also the double shifter boot caused issues of popping it out on the main box on some units! just something else to look at! Just sayin! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511034 Share on other sites More sharing options...
Onyx610 Posted October 4, 2022 Share Posted October 4, 2022 21 minutes ago, fjh said: We found the range pack would fail on the low side more often than not! Also check the trans yoke bolt for tightness they some times work loose! also the double shifter boot caused issues of popping it out on the main box on some units! just something else to look at! Just sayin! Christ, wish I could come across one that was that loose. All the ones I tried to take off were a nightmare. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511038 Share on other sites More sharing options...
Popular Post Onyx610 Posted October 4, 2022 Popular Post Share Posted October 4, 2022 Post a video of you driving it with the problem occurring. Maybe have someone film from passenger seat. 1 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511039 Share on other sites More sharing options...
fjh Posted October 4, 2022 Share Posted October 4, 2022 6 minutes ago, Onyx610 said: Christ, wish I could come across one that was that loose. All the ones I tried to take off were a nightmare. Ran across this twice got lucky i suppose! just thru it out there!🤣 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511040 Share on other sites More sharing options...
Onyx610 Posted October 4, 2022 Share Posted October 4, 2022 2 minutes ago, fjh said: Ran across this twice got lucky i suppose! just thru it out there!🤣 Haha, I believe it happens…just not in my world. Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511041 Share on other sites More sharing options...
Popular Post fjh Posted October 4, 2022 Popular Post Share Posted October 4, 2022 13 minutes ago, Onyx610 said: Haha, I believe it happens…just not in my world. Worth checking! Once flew from our town to a remote community on the main land prepared to do a range pack in the woods. Got there tighten the yoke bolt and flew back home. 8 hr service call to tighten a bolt. That’s why I mentioned it ! Could save an expensive situation!😅 2 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511042 Share on other sites More sharing options...
Onyx610 Posted October 4, 2022 Share Posted October 4, 2022 2 minutes ago, fjh said: Worth checking! Once flew from our town to a remote community on the main land prepared to do a range pack in the woods. Got there tighten the yoke bolt and flew back home. 8 hr service call to tighten a bolt. That’s why I mentioned it ! Could save an expensive situation!😅 Lmao, that’s awesome. You are right though. Check the easy/cheap stuff first. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511043 Share on other sites More sharing options...
mechohaulic Posted October 5, 2022 Share Posted October 5, 2022 pulling a transmission (can't call it a trans anymore LOL) out of a DM800 , the yoke nut was soo tight I put a 1in breaker bar strapped to the frame on the nut started truck and put in gear slowly letting out the clutch. one h--l of a noise = did the trick. transmisson was one of the largest machine shop master ever saw. twin stick 6 speed with bell housing PTO . cement truck 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511053 Share on other sites More sharing options...
Joey Mack Posted October 5, 2022 Share Posted October 5, 2022 yeah, I asked about a loose yoke as well, still no answer.. all good... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511054 Share on other sites More sharing options...
Onyx610 Posted October 5, 2022 Share Posted October 5, 2022 Just now, Joey Mack said: yeah, I asked about a loose yoke as well, still no answer.. all good... jojo Yes you did 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511055 Share on other sites More sharing options...
Onyx610 Posted October 5, 2022 Share Posted October 5, 2022 1 minute ago, mechohaulic said: pulling a transmission (can't call it a trans anymore LOL) out of a DM800 , the yoke nut was soo tight I put a 1in breaker bar strapped to the frame on the nut started truck and put in gear slowly letting out the clutch. one h--l of a noise = did the trick. transmisson was one of the largest machine shop master ever saw. twin stick 6 speed with bell housing PTO . cement truck Lmfao, I always love your stories…. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511056 Share on other sites More sharing options...
Joey Mack Posted October 5, 2022 Share Posted October 5, 2022 Mech. Kick's Ass.... Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511058 Share on other sites More sharing options...
Onyx610 Posted October 5, 2022 Share Posted October 5, 2022 (edited) Like the one that some guy you knew used a cable excavator to lift his truck up in the air to grease the truck, because he didn’t like laying on the ground to grease. 🤣 Edited October 5, 2022 by Onyx610 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70515-trans/#findComment-511059 Share on other sites More sharing options...
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