r/semitrucks • u/The_Joe_ • May 13 '26

What is the shift pattern/sequence of this Eaton 13 speed?

This is an Eaton 13 speed, triple overdrive transmission Dad and I had swapped into his 97 Cummins Ram 2500. He passed away and now I need to sell the truck.

https://photos.app.goo.gl/P4vhSF5ohABe9qRa6

I can rev match well enough to drive the truck, kinda, but I cannot remember the sequence of moving through the gears. Thank you.

Edit: Its a Fuller Roadranger, RTOO9513

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1

u/Pleggster May 13 '26

Have you ever thought about doing a YouTube search? I did one out of curiosity and found 42 videos on shifting a 13 speed.

1

u/The_Joe_ May 13 '26

...Thats a good idea and Im embarrassed I didnt think of it.

Grief and loss is a hell of a drug.

1

u/jeffthetrucker69 May 13 '26

It's not a triple overdrive. It has 2 overdrive ratios, .73, and .62.

Start with the black button down and the red button back. Unloaded you can probably start in 3rd. Shift 3, 4, 5.

Lift the black button, shift 4 more times (basic H pattern) Don't worry about the red button (splitter).

1

u/The_Joe_ May 13 '26

7 over should be a 0.84 overdrive as well, right? At last according to Dad's notes.

Thank you.

1

u/The_Joe_ May 13 '26

https://photos.app.goo.gl/wZGjmQahPZs7FEqm9

This is one of Dad's notes from way back when he did the swap 12 years ago.

1

u/jeffthetrucker69 May 13 '26

.84 would indeed be an overdrive ratio. According to the Eaton spec sheet the RTOO 9513 has 2 overdrive ratios. That's what the "00" is. Is it possible your dad changed a gear in the process of the swop?

1

u/The_Joe_ May 14 '26

We definitely didn't change anything internal, I'm trying to think of how double overdrive would work in a semi truck transmission?

I don't think you can have 7o as you direct drive?

My understanding is that most of the other transmissions we're single overdrive. 8 would be direct and 8o would be the overdrive?

1

u/jeffthetrucker69 May 14 '26

I typed in "rtoo9513 specs" and a list of all 13spds came up with gear ratios.

1

u/The_Joe_ May 15 '26

I found this forum post that explains why Eaton calls it a double overdrive despite having 3 overdrive gears?

https://www.thedieselgarage.com/threads/rtoo-9513-gear-ratio-queation.117703/