Are 15-speed trannies dead?
#1
04-11-2008, 12:33 PM
Join Date: Feb 2005
Location: Livin' large in the Ozark mountains of western Arkansas
Posts: 1,360
Are 15-speed trannies dead?
 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)
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#2
04-11-2008, 02:00 PM
Re: Are 15-speed trannies dead?
Originally Posted by 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)
#4
04-11-2008, 02:14 PM
Originally Posted by 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.
#5
04-11-2008, 04:24 PM
Re: Are 15-speed trannies dead?
Originally Posted by 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)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!!
#6
04-11-2008, 04:39 PM
Didn't they store the 15 speeds in the same back lot as the 23 speeds and the browning boxes??
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#7
04-11-2008, 08:34 PM
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.
#8
04-12-2008, 12:00 AM
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.
#9
04-12-2008, 12:04 AM
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.
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#10
04-12-2008, 12:48 AM
Join Date: Feb 2005
Location: Livin' large in the Ozark mountains of western Arkansas
Posts: 1,360
Re: Are 15-speed trannies dead?
Originally Posted by Useless
Originally Posted by 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)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!! :lol: :lol: Now that was funny!! :lol: :lol:
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"Looks like a legend and an outta work bum look a lotta like Daddy," Little Enos Burdette. Hook 'em Horns!! "Life is hard. It's harder if you're stupid." John Wayne "Talk to me Goose". "What we're dealin' with here, is a complete lack of respect for the law," Sheriff Buford T. Justice. Friends don't let friends drive for C.R. England! |
