Hello, in CDL school I learned on.a Mac that had a 10 speed Eaton and I could down shift that one no problem, I would let the rpm's come down to 10 clutch to neutral than tap the accelerator than clutch to gear. The truck I am driving now is a Mac 8 speed with a maxitorque es t300 transmission and I can't downshift for crap now. I read through the manual and searched online and can't find anything on the shift rpm's and the other drivers at my job go by the engine sound and float their gears so they are not much help. I definitely struggle shifting from say 5th to 4th or 5th to 3rd. Can anyone give me some pointers please
Mac 8spd maxitorque es t300
Discussion in 'Experienced Truckers' Advice' started by Pats6861, Feb 25, 2024.
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Most of us float the gears and never touch the clutch unless stopped.
shanman Thanks this. -
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second take note of where you upshift, seeing you are using a 308 Mack, if I was driving it, I would split the second gear and go through the four others hitting 1850 and on the way down shift around 1200. But this is me, I’ve driven almost everything on the road. -
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Watch rpm’s when you shift.
Instead of 400 rpm’s be probably closer to say 600 rpm’s between gear, be same when downshifting go to a grand then bump it up to that many and it’ll fall into gear -
Maxi torque transmissions are some of the biggest piles of crap right next to meritor, usually about the time I remember how to shift them is when it’s time for me to get back into my own truck
did you mention what was under the hood or did I miss it? Don’t know a lot about the new ones rpm wise, but the old 237/300/350s low rpm was 1200 up to 2100 I think? -
Don't remember the year. I just know it's a Mac pinnacle 8 speed maxitorque ES t300 transmission. It's at least 10 years old
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Is that the 8 speed with the blue range selector? If I remember right you shift 1-2 select high range then 3-8. Try allowing 400 rpms between 1-4 and maybe 500 between 4-7. Probably 550 between 7-8. Those Maxitorque transmissions are some of the most arrogant transmissions I've ever ran, but they're definitely the toughest. If you can learn to shift one of those you'll be able to drive anything
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It's 1-4 low range than 5-8 high range and it also has just one low gear, I would assume it's for getting started with a heavy load on a incline and two reverse gears.
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