tyler Posted January 25, 2012 Share Posted January 25, 2012 looking at buying a 1999 ch613 mack with a e7 355/380 engine, 10 spd. 4:11 rears. is this a good set up ?? looking to haul dump trailer with it grossing 100,000lbs. will this setup work ok ?? any input would be helpful Quote Link to comment Share on other sites More sharing options...
slpwlker Posted January 26, 2012 Share Posted January 26, 2012 Might be slightly under well alot under powered for that weight up there. unless your more flat ground which in Maine is not likely. just don't look to get rolling with the big horses Quote Link to comment Share on other sites More sharing options...
convoyduel Posted January 26, 2012 Share Posted January 26, 2012 I had a new custom 2002 RD with a 355/380, Mack 18 and 4.11 Mack 44 rears (maybe 4.10). Should have been a gold dog but for whatever reason, Mack wasn't doing that on the RD in April '01. The truck was a tri axle dump truck 20/20/44 and sometimes pulled a pup grossing 120k. It's a decent set-up and I never had a problem with power, but the 427's and 460's of that vintage pulled slightly better. It was no comparison to the way a 475 Cat 6NZ walked up the hills, but I'll take the Mack any day overall. I would be hesitant with a 10 speed 355/380 combo pulling that weight. Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted January 26, 2012 Share Posted January 26, 2012 Little under powered and the 10 speed lacks low gearing that is usefull on hills or soft ground. It will pull but not like a 500 HP truck. Quote Link to comment Share on other sites More sharing options...
convoyduel Posted January 26, 2012 Share Posted January 26, 2012 As Trent said, the low gearing likely isn't there. We got by with our set-up by using the 18 speed. On deep pulls, especially uphill from a dead stop, we used the splitter on the low side frequently. God I miss that dumb truck. Quote Link to comment Share on other sites More sharing options...
tyler Posted January 26, 2012 Author Share Posted January 26, 2012 thanks guys, didnt know how that transmission was geared for starting off with that weight, would the motor pull like the old 350 12 spd set up in the old superliners ?? dont know much about the combo 355/380 ratings Quote Link to comment Share on other sites More sharing options...
slpwlker Posted January 26, 2012 Share Posted January 26, 2012 Not likely Quote Link to comment Share on other sites More sharing options...
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