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Old 09.25.2007
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Shifting a 15 speed?

I was wondering if anybody had a shift sequence for a 15 speed, because the pattern was worn off of the truck I had to pick up today.
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Old 09.25.2007
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get with brickman...he has recent experiance with a reversed 15...so it should be very easy to explain
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Old 09.25.2007
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What year??????


Some time in the late 80s they changed it so if its later than that it should shift like a 10 spd. Most of the time you can ignore the bottom 5 as that is deep reduction used mainly for off road or where you need really slow gearing.


If its an old trans pattern it'll be like this...........


R 2 5
1 3 4
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Old 09.25.2007
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Thanks alot i'm not sure what year it is, i'll find out tomarrow when I drive it. Really apprciate it guys.
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Old 09.25.2007
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If it doesn't want to shift with the reverse 4 and 5 try shifting it like a regular ten spd and see if that works.
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Old 09.25.2007
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15 speed

Range select front lever down low up is high

R 2 4
1 3 5


Upper Gears split with side lever

R 8/9 12/13
6/7 10/11 14/15
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Old 09.26.2007
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Quote:
Originally Posted by Powder Joints View Post
Range select front lever down low up is high

R 2 4
1 3 5


Upper Gears split with side lever

R 8/9 12/13
6/7 10/11 14/15



Thats unlike any 15 i've driven.



All the ones I've driven with the range lever in the down position the side bar will shift you from low range to deep reduction.
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Old 10.20.2007
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I agree with Brickman. Any 15 i drove or saw was a 10 with deep reduction. Had to drive one today with the 4/5 reversed. BTW, I think the reversed pattern is called a RTX not a RTO. They are both overdrive trannies.
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Old 10.20.2007
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Quote:
Originally Posted by uncle bill View Post
I agree with Brickman. Any 15 i drove or saw was a 10 with deep reduction. Had to drive one today with the 4/5 reversed. BTW, I think the reversed pattern is called a RTX not a RTO. They are both overdrive trannies.
You have it backwards, RTX shift patterns are the same as RT. RTO patterns have the top gear position in the upper right corner.

IIRC, Eaton never really gave the 15 speed an "RTX" name, but gave the buyer an option of either shift patter, both called RTO. I don't think the reverse pattern is available anymore, except maybe as a special order, the straight RT/RTX patters are far more popular.
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Old 10.20.2007
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we still have a freightliner with a 15 in it and we shift ours just like powder joints explained
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