Waltleon1 Posted June 29, 2018 Share Posted June 29, 2018 I just bought a 1997 ch613 with the E350 with a 6 speed, drove it home bobtail and yes it was a little sluggish after 4 gear and on up. Got it home and hooked it to a 12000 lbs trailer and it don't have any power to pull it hardly. It's had a fresh oil change and fule filter change. But it does have a copilot thing on the dash I know nothing about. I Need some help on this one!?!? Quote Link to comment Share on other sites More sharing options...
alex g Posted June 29, 2018 Share Posted June 29, 2018 Never saw a copilot before. Maybe see what it's wired into and eliminate it if it's not necessary which I doubt it is. Is your turbo building boost that can definitely cause it to be sluggish Quote Link to comment Share on other sites More sharing options...
fjh Posted June 29, 2018 Share Posted June 29, 2018 which trans do you have? Quote Link to comment Share on other sites More sharing options...
Waltleon1 Posted June 29, 2018 Author Share Posted June 29, 2018 16 minutes ago, fjh said: which trans do you have? it's just a Mack 6 speed Quote Link to comment Share on other sites More sharing options...
Waltleon1 Posted June 29, 2018 Author Share Posted June 29, 2018 35 minutes ago, alex g said: Never saw a copilot before. Maybe see what it's wired into and eliminate it if it's not necessary which I doubt it is. Is your turbo building boost that can definitely cause it to be sluggish Yes the turbo is building boost, it has the power 1 and 2nd gear after that it really don't have the power to pull Quote Link to comment Share on other sites More sharing options...
fjh Posted June 29, 2018 Share Posted June 29, 2018 a 11 hours ago, Waltleon1 said: Yes the turbo is building boost, it has the power 1 and 2nd gear after that it really don't have the power to pull I must say 6sp is an odd trans to have in front of a 350! could it be may be a 9 speed? Quote Link to comment Share on other sites More sharing options...
41chevy Posted June 29, 2018 Share Posted June 29, 2018 12 hours ago, alex g said: Never saw a copilot before. Maybe see what it's wired into and eliminate it if it's not necessary which I doubt it is. Is your turbo building boost that can definitely cause it to be sluggish It is a monitor system. Newer video but still most of the same functions as the '97 https://resources.macktrucks.com/videos/mack-trucks-co-pilot-video Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
Mack Technician Posted June 29, 2018 Share Posted June 29, 2018 (edited) We have a fleet owner who bought 5-6 of those 6spd units off of Manders Diesel. T2060A trans with a flat curve engine. Ultra light units. Hauled flat beds of lumber, on dedicated day runs, over flat land. 7 MPG+. He eventually switched to long case when he diversified the hauling. Start with a tune up. If your hauling easy it may be a decent truck. Injectors check, timing check, CMCAC pressure check, fuel PSI check, etc. etc. Edited June 29, 2018 by Mack Technician Quote Link to comment Share on other sites More sharing options...
Maxidyne Posted June 29, 2018 Share Posted June 29, 2018 Yup, the 6 speed transmission would suggest a Maxidyne. But the 6 cylinder Maxidyne in the U.S. had a top rating of only 300 HP until 2001, so are you sure this is a 350? But even if it's only a 300 or even a 275 or 250, it should be well capable of moving 80k# loads, just not real quickly. So like MT said, first check to make sure the engine is running as it should. Quote Link to comment Share on other sites More sharing options...
Dirtymilkman Posted June 29, 2018 Share Posted June 29, 2018 39 minutes ago, Maxidyne said: Yup, the 6 speed transmission would suggest a Maxidyne. But the 6 cylinder Maxidyne in the U.S. had a top rating of only 300 HP until 2001, so are you sure this is a 350? But even if it's only a 300 or even a 275 or 250, it should be well capable of moving 80k# loads, just not real quickly. So like MT said, first check to make sure the engine is running as it should. Mack came out with a different 6spd in the later 90s For a lightweight truck. I don't think it was like the old 6 speed's. Quote Link to comment Share on other sites More sharing options...
Maxidyne Posted June 29, 2018 Share Posted June 29, 2018 There was a 6 speed "gathered ratio" transmission offered in the 300 series Maxitorques, but I think a 97 would have been too early for that. IIRC there was a 100 series Maxitorque 5 speed with a closer ratio 4th gear that could be made a six speed with the low hole gears, but 97 is kinda late for a 100 series. Gonna have to dig up some old spec sheets... Quote Link to comment Share on other sites More sharing options...
Maxidyne Posted June 30, 2018 Share Posted June 30, 2018 Turns out there was a 2060 series gathered ratio transmission that would sorta work with a conventional torque rise E7-350. The first couple splits are pretty wide though and wouldn't work well if the truck had to climb a lot of steep grades. Quote Link to comment Share on other sites More sharing options...
fjh Posted June 30, 2018 Share Posted June 30, 2018 I asked that question because I thought It maybe a torque limit switch holding him out on power However I have Never layed eyes on one of these transmissions so Can't make that recommendation With confidence ! Quote Link to comment Share on other sites More sharing options...
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