Are Super 10's weak?

Hows that even possible? No speed sensor in gearbox?

 

There is no electronic control on the transmission so no, there is not a speed sensor except for the one on the output shaft for the speedometer. I'm sure the newer ultra and auto shifts have something of the sort.

 

While I would never order a new truck with a super 10 if a I am looking at used and the other specs are correct, I would not be afraid of it. I always shared everyone's dislike of super 10 until I actually had one long term. Truck ran over a million miles and have yet to pull the the trans.

 

I'm not a transmission expert but I think in Europe they use speedometer sensor signal to prevent that, even with Eaton/Fuller transmissions.

 

I see how it could work, there would have to be some sort of processor or control unit that blocks off the proper air lines to keep it from happening over a certain speed.

 

I kind of poked through the air manual a bit ago... didn't see any kind of interlock that had been added on the air side. I suppose they could add something to mechanically sense output shaft speed, but I haven't had time to dig through the parts diagram to see if they had. I know there's nothing on the 13s as I had bumped my range shift one day and not realized it until I heard the box trying to spin up as I downshifted.

 

Europeans have always had some kind of lock, I think in the early days it must have been some kind of mechanical device because speedos were mechanical. I have not driven any old trucks with Fuller so I don't know if they had any interlock.

 

I had a super 10, and liked it ok. My main complaints were that the singing in 10th gear was loud, the splitter gears shift slow because of the wide ratio between gears and Detroits being slow to rev down, and reverse is geared too fast.

 

I got super 10 in my peterbilt with 980000 miles NO PROBLEMS and I will buy another one without worries.

 

Super 10 transmissions are completely useless and one of the worst designs ever produced. Your better off with a straight 10, rather than a super ten.

Hell, a 10 speed isn't even worth it's weight.

I wouldn't buy anything other then a 13 or an 18 speed. Super 10's, 10, and 15 speeds are worthless for highway applications, but that's just my opinion.