Auto Shift Transmissions

Y2K,if you have time,can you posts which autoshifts have done this?
Brand off autoshift,truckbrand and buildyear.
Think people will be interested to know this info(me included) because up to now i have never hearded off this.

 

WE have both laid out links to go look and read/watch. You haven't made one valid argument or given any reason why anyone would buy an autoshift. I made a decent post with arguments favoring the Allison. You haven't created anything to favor anything. Don't hate Allison because shes a tranny.

 

Mid 2000's Macks, truck I'm in now is an '06 Vision.
Trans is an Eaton Fuller Auto-Shift 10 speed.
We have or had about 100 of them with this trans, I've driven probably 20 of them.
They started fazing them out and replacing with Allisons in 2012 and this year bought a bunch of new trucks with the M-Drive 12 speed.

 

1°What you have posted is straight from the Allison website.
They call that propaganda.

2°you yourself have said you haven't driven the newer autoshifts yet you bash them.

3°if you read what posted them them you would know that i didn't say the Allison was ALL bad.
I said it might have it's use in certain applications but not OTR semi's.

4°i own,maintain and drive a autoshift.(since 06)
It has NEVER stuck in gear.
It has NEVER upshifted going downhill.
In fact when i start using the Jake,it automaticly downshifts (just as you would do if you drove a manual) so the Jake gives max performance.
I would say that allows me to voice a opinion about autoshifts.

Now the issue has been raised about upshifting autoshifts going downhill.
I have never hearded off this problem.
That's why i asked Y2K to post more info.(i suspect i know which autoshift is giving the problems but i await Y2K's answer)

5° You make a post about me being positive about the Paccar motor like that's a bad thing.Why?
What has that to do with this thread?


6°Not you or Copie have answered my question about why, in all you have posted from Allison's website ,they don't compare their product to the I-shift,M-drive or the Detroit autoshift?

7°Allison is proud that their gearbox can start with the engine running 1650RPM.(that's starting off after a full stop)
Now the last thing you want in a modern engine(which is what the OP is going to buy) is to run such high revs as a modern engine is allready on the downcurve in performance with those RPM's.

8°With autoshifts i am a firm believer in buying the gearbox the engine was developed with as software is crutial in this.

 

Any problems with the M-drive?

 

It was in response to a comment that clearly was done that showed no depth. It showed that the videos must not have been watched, or no further investigation was done. Therefore it showed that the mindset of one who needs to be handheld thru everything. Just like those that I referenced. Whoever is on this forum, obviously has a computer, tablet, or smart phone. to that end, they have access to the internet and can do searches. Allison has a a website and there is youtube and a number of other sources. If one would avail themselves of these little items, then the comment about straight trucks, etc could have been avoided.

 

I personally haven't driven one yet but I haven't heard much in the way of complaints.
One driver did say something about it skip-shifting up a hill when he was empty and not liking that but other than that I've heard nothing negative.

 

You can call what was posted propaganda all you want. The bottom line is, what the Allison videos posted is true. Yes, they can start on a 25% grade, yes, they can out run an auto-shift, heck even a driver banging gears in a straight 10 speed probably wouldn't compete with the Allison in getting up to speed.

Can your auto shift get up a 25% grade? Can your auto shift beat an Allison climbing a hill? Maybe the new auto shifts can back smoother, maybe they aren't as jerky. But I'll take the Allison. Your argument is they shouldn't be in an OTR truck, but a garbage truck. You haven't given any good reasons why they shouldn't be in an OTR truck except they don't last when you're heavy and also compared them to the longevity of a car trans.

If the chance comes, I'll drive one. But I wont spec an autoshift. I know what I want, I know what I like, and I know what revisions are made.

The Allison can shift at 800, 1600, or 2,100 RPM, just like an auto shift or manual transmission can. When you need power, you need the RPM's. You aren't going to merge up hill on to a high way at 1,200 RPM. It really doesn't matter, its all in the throttle. I can have my 6V92T shift starting off at 1,200 RPM or less if I want too, all how I use the throttle on my 740 Allison.

Bottom line, an I-Shift, DT12, or Ultrashift, it may be smoother, but in harsh testing conditions, the Allison will beat it. Maybe its fine in normal driving, but again, I love the sound and feel of the Allison. Let's see any of those auto shifts climb from a stop a 25% grade.

 

Y2K,as i suspected it was the older Eaton that was having the issues.
Thank you for clearing that up.

 

I will concede, gladly, that a lot of the auto shifts have come a long, long way. If the Allison wasn't an option, I would target the Mack mDrive, which is a variation on the Volvo iDrive, but it tailored more to the Mack crowd and their specific demands. And the latest Detroit DT12 is nothing to sneeze at. But while I would consider one of these, it would only be because I would not be able to get an Allison. The auto shift folks have done good things, but Allison has been at this game for several decades and they know how to make strong automatics that can handle some pretty serious trucking tasks. They did not develop their automatics around general fleet ideas of doing things like the auto shift OEM's have done. Only recently has Volvo introduced an iShift that is targeted to heavy haulers. Nice that they decided to come to the party, but while they work out the bugs on this newest offering, Allison had it all solved decades ago.