I am buying a truck from a friend of mine who is kind of a doofus. Now, I watched him drive the truck and he does not grind his gears. But, he was calling it a 13 speed the whole time when after driving it across town I believe it to be a 15 speed.
It appears to be a 10 speed with a H-L splitter that works for the high range gears (6-10).
The way my friend would shift it was he would go straight from 5 to 7L, 7H, 8H, 9H, 10H. So I guess the way he used it it was a 13 speed because he was skipping over 6 all together. When downshifting, he would sometimes downshift to 6H on a curve. But he was calling that "extra gear" you can shift down to on a curve. But he said he never used 6L because the rpms were weird.
I found what he was talking about because 6L appeared to be a lower gear than 5. I guess, that could be viewed as a gear you can shift down to in traffic without having to keep using the splitter to go back and forth from 5 to 6.
I guess my question is, are the L gears meant to be used regularly that way? It seems when cruising along in 10H, 10L is a nice gear to have as a passing gear or uphill gear to maintain speed, rather than going down to 9. But is it meant to be used that way?
15 speed Eaton??
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dedrick, Nov 20, 2019.
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One way to tell a 13 from a 15 is the color of the thumb switch on the side. 13 is red,15 is blue,18 is gray.
Tx Countryboy, spsauerland, Odin's Rabid Dog and 7 others Thank this. -
If he drove it like a 13 speed, why would you think it is a 15? And btw, the extra 5 gears are Granny gears, not on the high side.
Roberts450, Goodysnap, Tall Mike and 2 others Thank this. -
A 13 is just a 9 that you can split the top 4 on. Red splitter button.
A 15 is just a 10 that has 5 deep reduction gears. Blue button on the shifter, plunger on the side of the stick, or an air switch on the dash.
If you progressively shift a 15 from lowest gear to highest gear you'd only use 12 gears.Oxbow, spsauerland, Bean Jr. and 3 others Thank this. -
Yes it's meant to be split that way.Oxbow, Bean Jr., exhausted379 and 2 others Thank this. -
Let's ask questions that have already been explained in the OP. -
Chrome is a popular color is why I post this.Oxbow, exhausted379, 062 and 1 other person Thank this. -
NVM. BrainfartLast edited: Nov 20, 2019
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I think your buddy probably has a 13 spd and uses the cheater gear, which is not recommended.
You can't split gears with a 15 speed, you drive it like a 10 spd unless you need more low end grunt.
What might look like the splitter is deep reduction for a 15 spd, the hi lo paddle is hi lo just like the other Eaton boxes.Oxbow, Bean Jr. and OLDSKOOLERnWV Thank this. -
I was wondering the same thing....
We use to use “the cheater” just to finish topping a hill but never to pull the hill.Oxbow and exhausted379 Thank this.
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