M925a2 Power Surge

[red]

Okay love the information but need a guide to understand what I am seeing, what does RPMTLOF stand for? Each letter please.

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RT=Roadranger twin countershaft
RTF=twin countershaft with forward mounted shifter
RTO=twin countershaft with overdrive
RTOF=twin countershaft with overdrive and forward mounted shifter
RTLO=twin countershaft with low and overdrive
RTLOF=twin countershaft with low, overdrive, and forward mounted shifter
RTOO=twin countershaft with 2 or more overdrive gears
RTOOF=twin countershaft with 2 or more overdrive gears and forward mounted shifter

There are other letters but this covers the majority of the eaton fuller road ranger twin countershaft transmissions.

A forward mounted shifter (F at the end of the letters) places the transmission shifter roughly where the spicer 6453 shifter is in the m809 series trucks.


After the model letters come the model numbers. There are normally 4 or 5 numbers. 4 numbers are transmissions rated for less than 1,000ft/lbs torque, 5 numbers are rated for over 1,000ft/lbs torque.

The first number (when 4) or first 2 numbers (when 5) stands for the rated maximum torque.
The next number designates which design level it is.
The last 2 numbers list the number of forward gears.

Take RTOO 14613 for example. Twin countershaft with at least 2 overdrives.
Maximum torque rating of 1,400ft/lbs
6 in the design level (multi mesh gearing is what 6 stands for)
13 forward gears.

Now take RTOF 9513. Twin countershaft with overdrive and forward shifter.
Maximum torque rating of 900ft/lbs
5 in the design level (coarse gearing)
13 forward speeds.

 

[simp5782]

I do have a spicer p8516 that needs a home.

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[74M35A2]

The more letters it has, the more gears it has. There.

 

[Swamp Donkey]

The more letters it has, the more gears it has. There.

Sounds like the ROFLMAO version would be the best option then.

 

[74M35A2]

See how smart you are? That is exactly where I was headed with this.

Could you imagine hooking two together? You would have like 169 gears to jam. That's a lot of jaw jacking on the CB.

 

[simp5782]

Let's make driving a real challenge

https://youtu.be/BJC47912E_4

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[red]

How bout complicated, 3 stick shifting! haha

https://www.youtube.com/watch?v=8lEYaTvvq4g



If you watch the video in the link I'm pretty sure he's driving a 13 speed and throwing the main shifter around way more than necessary. His shift levers are left-gear splittler. Middle-main shifter. Right-Hi/low. The splitter and hi/low are just air solenoids. Most people use this shifter handle instead of 3 shifters:




Red switch is the gear splittler, black is the hi/low

 

[Another Ahab]

To watch it, it looks like a kind of suicide set-up.

But I guess it isn't.

 

[gimpyrobb]

I guess if you need to feel like your a badazz, go for it.

I'd never be able to drink my Jack N Coke if I had a shifter like that.

I know I'm a badazz, so I have no need for such shifters.

 

[Swamp Donkey]

I guess if you need to feel like your a badazz, go for it.

I'd never be able to drink my Jack N Coke if I had a shifter like that.

I know I'm a badazz, so I have no need for such shifters.

You spilled your Jack N Coke in my truck and I have an automatic....and you weren't even driving!

Bad azz, my azz...

 

[Another Ahab]

I'd never be able to drink my Jack N Coke if I had a shifter like that.

 

[gimpyrobb]

You spilled your Jack N Coke in my truck and I have an automatic....and you weren't even driving!

Bad azz, my azz...

That might have been because it was my 10th. I wasn't too drunk to notice the chips you had been eating though...


How you found that flavor is beyond me

 

[Swamp Donkey]

I wasn't too drunk to notice the chips you had been eating though...

Yeah, well you did eat the whole bag. Then you got out the truck and posed for a picture...

 

[gimpyrobb]

HA, nice try.

The only time I was THAT bad, DH ran me over with his golfcart.











TWICE! Now you know why I gimp around

 

[Swamp Donkey]

Twice, huh? Seems he was aiming at something, haha.

 

[74M35A2]

I can't take you girls anywhere.

 

[74M35A2]

Got the mechanical to electronic throttle interface solved. Cummins actually makes a control adapter for marine. That was easy. This will handle the throttle and trans modulator cable, all with the stock pedal.

Next step, get the 400hp 8.9L ISL engine out of the RV, up here, and ground run it. Engine ECM only needs power, ground, and this throttle input. ECM is changeable to 24v, I will need a 24v lift pump. Optional cruise control via switches, mechanical dash throttle lock will still work. Cummins p/n 4070035.

 

[74M35A2]

It is a 2005 engine, but I am still going to stuff a new rear crank seal in it while it is out.

I will likely transfer over my 6CTA flywheel housing, fan drive, and exhaust manifold, to keep everything at the same locations. Oil pan too if need be for front axle clearance.

 

[gimpyrobb]

I think you should pull the heads and put new rings in it...

 

[Csm Davis]

I think you should put the 6speed in also

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