Are 15-speed trannies dead?

[Midnight Flyer]

Looking at Truck Paper's website I've noticed that all the big rigs either have 9-speed, 10-speed, 13-speed, or 18-speed transmissions but have rarely seen any advertised with 15-speeds. Have they gone the way of polyester leisure suits, 8-track tape players, and platform shoes or are they still made and only used in very rare specialized applications? 8)

[Fredog]

Looking at Truck Paper's website I've noticed that all the big rigs either have 9-speed, 10-speed, 13-speed, or 18-speed transmissions but have rarely seen any advertised with 15-speeds. Have they gone the way of polyester leisure suits, 8-track tape players, and platform shoes or are they still made and only used in very rare specialized applications? 8)

we have one, its a 98 pete 379 I hate it

[allan5oh]

I do not see them on spec sheets any more. They're more of a vocational transmission anyways. New 15 speeds also cannot handle torque very well.

[Fredog]

I do not see them on spec sheets any more. They're more of a vocational transmission anyways. New 15 speeds also cannot handle torque very well.

mine has super 10 and since they unhooked the automatic part, I love it. a regular 10 speed is just too much work

[Useless]

Looking at Truck Paper's website I've noticed that all the big rigs either have 9-speed, 10-speed, 13-speed, or 18-speed transmissions but have rarely seen any advertised with 15-speeds. Have they gone the way of polyester leisure suits, 8-track tape players, and platform shoes or are they still made and only used in very rare specialized applications? 8)

Hi, Midnight!!

There are plenty of 'trannies" around, but I think that most of them are now living in San Francisco!!

Now, as to whether or not the have 15 speeds??!!

I do not know!! ........ nor do I WANT to!!

[Orangetxguy]

Didn't they store the 15 speeds in the same back lot as the 23 speeds and the browning boxes??

[Chasing Daylight]

They still produce a 15, at least Eaton Fuller does. It's basically set up as ten road gears and five deep reduction gears. Not much use excapt for in on/off highway vocational applications. My rock jockie friends swear by them.

[special k]

The only reason you don't see as many 15's around anymore is that they don't have the torque rating of the 18 so the OEM's won't put them behind a big motor. If Eaton would have upgraded the trans to 1850 or 2000 I'd be running one today. IMO a 1450 15 is a better trans than a 1850 18.

[Kranky]

In an application where you're doing heavy haul or running in steep hill country, the 18 would be a better choice because you can split every gear.

[Midnight Flyer]

Looking at Truck Paper's website I've noticed that all the big rigs either have 9-speed, 10-speed, 13-speed, or 18-speed transmissions but have rarely seen any advertised with 15-speeds. Have they gone the way of polyester leisure suits, 8-track tape players, and platform shoes or are they still made and only used in very rare specialized applications? 8)

Hi, Midnight!!

There are plenty of 'trannies" around, but I think that most of them are now living in San Francisco!!

Now, as to whether or not the have 15 speeds??!!

I do not know!! ........ nor do I WANT to!!

Now that was funny!!

[heavyhaulerss]

mine has super 10 and since they unhooked the automatic part, I love it.

I also have a super 10. what do you mean when you say they unhooked the automatic part ?

[Fozzy]

mine has super 10 and since they unhooked the automatic part, I love it.

I also have a super 10. what do you mean when you say they unhooked the automatic part ?

Probably means the "Top 2" function..

[Fredog]

mine has super 10 and since they unhooked the automatic part, I love it.

I also have a super 10. what do you mean when you say they unhooked the automatic part ?

the mechanic unplugged something so the top 2 dont shift automatically anymore, it is much much better that way, only shifts when I want it to. pulling a tank doesnt work well with the auto shift function..