Peterbilt transmission type

I drive a Peterbilt 365 mixer truck, 2015 or so model. with the selector switch down, you have gears 1 through 4 and R,with the selector switch up, you have gears 5 through 8 and R . There is also a high low switch on the shifter knob so that you can have for example 1st gear low or 1st gear high, etc.

What is this transmission? a 10 speed?

 

I think the splitter is grey. ChatGPT says the types are below...so you think an 18 speed?

1. Eaton Fuller 10-speed manual transmission
2. Eaton Fuller 13-speed manual transmission
3. Eaton Fuller 15-speed manual transmission
4. Eaton Fuller 18-speed manual transmission
5. Allison automatic transmission (various models, such as the 3000 series or 4000 series)

 

From ChatGPT -

"

Based on the information provided, it is likely that your Peterbilt 365 is equipped with an Eaton Fuller manual transmission, commonly found in commercial trucks. The splitter switch indicates that the transmission has a splitter, which allows for additional gear ratios beyond the standard 8 forward gears and 2 reverse gears. The high low switch suggests that the transmission has a range selector, which allows for selecting between high and low ranges, effectively doubling the number of available gears. Eaton Fuller transmissions are known for their durability and are commonly used in heavy-duty trucks like the Peterbilt 365. However, for a definitive identification of the transmission, it is recommended to consult the manufacturer's documentation or consult a qualified mechanic.

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Still it doesnt tellme which i have