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Old 03-13-2024, 10:13 AM   #1
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Info on 10speed fuller conversion too DT466 P

I have a 1991 international bus and it has a At 545, I am going to replace that with either the 10 speed filler or the MT643 I have both, but I would like to get some info on what all is needed and we’re to to find the clutch and flywheel that will mate up to the DT466. Does anyone have any info on this!!!! Thank you!!!

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Old 03-13-2024, 07:07 PM   #2
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https://en.m.wikipedia.org/wiki/Inte...s_(bus_chassis)

10 speed would take some creativity as they were never used in a bus. The RTOO is the only model with OD gears, so you'd be shifting a lot more just to get to a 1:1 final drive.

Sell both and A-2000 swap if you're looking for road speed.
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Old 03-13-2024, 08:22 PM   #3
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Originally Posted by La Camioneta View Post
https://en.m.wikipedia.org/wiki/Inte...s_(bus_chassis)

10 speed would take some creativity as they were never used in a bus. The RTOO is the only model with OD gears, so you'd be shifting a lot more just to get to a 1:1 final drive.

Sell both and A-2000 swap if you're looking for road speed.

or gear to something like a 3.90 or 4.10 and put the 10 speed in... tall rear gears and a 10 speed make not having OD a non issue... its final drive that matters..



does your 10 speed have an SAE2 bell? a lot of them were SAE1 which wouldnt mate up to a DT466 (which is an SAE2 (or adapted down to an SAE3 for the 545 thats on it now)
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Old 03-13-2024, 09:40 PM   #4
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Some Crowns came with a 10 speed trans. I think they called them a "road ranger".
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Old 03-13-2024, 09:49 PM   #5
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Here you go, a 5 and 3.
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Old 03-14-2024, 12:11 AM   #6
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I’m not sure I am going to check if it’s SAE2 tomorrow.
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Old 03-14-2024, 12:18 AM   #7
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Hmmmmm….. yea that’s what I’m worried about because I have no idea where to find a clutch and flywheel and custom **** like that is extremely hard. I was hoping there was some other vehicles that came with a 10 speed and a Dt466 like a dump truck or something so I could buy that clutch and flywheel set up.
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Old 03-14-2024, 01:10 AM   #8
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Oh, yes, Fuller RoadRangers were most definitely used in many Buses.

Crowns were available with Fuller RoadRangers since forever. It was definitively an extra cost, Custom option, ordered by some customers for their new builds. Most were RT-910's (direct 1:1 10th no OD) behind the Detroit 6-71's and Cummins 220's from the late 50's to the end of production in 1991. They could just have easily been RTO-910's which were Overdrives usually about .87:1 in 10th. The shift pattern was different with 4th and 5th swapped in the OD's.

This was all part of the custom order thing specified in the original build order from the customer. Crown would install whatever the Customer wanted and paid for. That's why Crowns are so varied and it's almost impossible to find any two Crowns identical in their details.

As Crown began installing the much larger Cummins Big Cam 855 Cu. In. displacement engines somewhere in the early 1970's they started using the larger torque handling RoadRangers. Usually something like a RT(O)-12510 which indicate 1,250 ft lbs of torque instead of the 900ft/lb in the RT(O)-910 for the 6-71's and 220's.

I've driven every kind of Crown with every one of these various transmission combinations and I can tell you for a FACT that Fuller RoadRangers were available and used in Buses, and they weren't all Crowns. Gillig did it as well.

I own two Crowns with 10spd RoadRangers. The 300hp Cummins Big Cam III has an RTO-12610 overdrive transmission. The other one is a turbocharged 6-71T with an RT-910 (non-OD) and the standard 4:11 rear end so it only does about 63mph now.... all that will change once I get the scratch to make the upgrades. It will become and RTO at least, and maybe even a 3.70:1 rear-end. I always feel the need for speed.... The Turbocharging on this one will let it easily hold 80mph road speed when upgraded, so why not.

I think for your application you should do some research into the vast Fuller, now Eaton-Fuller line of transmissions. They made Road Rangers in many different Torque ranges down to around 600ft/lbs for use in smaller delivery trucks behind smaller engines. They were available in various numbers of gearing from 5 spds to 6,7,8,9,10,13,15 spds. Not all gears were available in all models but you should easily be able to find a smaller torque range (600ft/lb) 10spd RoadRanger that would fit a smaller engine and bell housing setup.

The key is to remember that (Eaton)-Fuller makes a vast amount of various models and gear ranges designed for medium duty truck applications up to the largest and heaviest duty of over the road trucks and the monster engines in use today. Research will help you find a good fit for you and I'd encourage you to look around for a good used one of the proper model for your application. No need to invest in anything brand new. Should be lots and lots of great used ones or ones that can be refurbished for a decent price.
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Old 03-14-2024, 08:19 AM   #9
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If I remember correctly a RTO-610 or RTO-6610 was .80 in top gear and came with #2 and rarely a #3 bell housing. It also had a smaller input shaft. And yes I have driven a cornbinder with a dt466 and 10 speed RR. They are nice to drive.
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Old 03-14-2024, 09:01 AM   #10
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Originally Posted by s2mikon View Post
If I remember correctly a RTO-610 or RTO-6610 was .80 in top gear and came with #2 and rarely a #3 bell housing. It also had a smaller input shaft. And yes I have driven a cornbinder with a dt466 and 10 speed RR. They are nice to drive.

the DT466 being as relatively "light" engine (compared to a semi).. makes for an easy RPM matching for non synchro transmissions..



the pump (or computer on an E) is merely an RPM setpoint.. so letting off the go pedal a little results in a nearly instant RPM drop to the "setpoint" makes it easy to float gears on a road ranger..
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Old 03-14-2024, 10:37 AM   #11
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Most of the dt466 dump trucks that I've seen with a "10" speed were a 5+2 arrangement with a 2 speed axle. IIRC from my 1984 s-series shop manual, a 10 speed fuller was an option, I've just never seen one.
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Old 03-14-2024, 11:03 AM   #12
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For the clutch and flywheel, make sure they match up with your DT466. Check out local mechanics for some help.
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Old 03-14-2024, 03:57 PM   #13
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Pirate 4x4 has some info on 9/10 speed swaps as they have a lot of unique toy haulers.
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Old 03-14-2024, 07:30 PM   #14
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You’re awesome man!!! Thank you for all the info I talked to a guy in Florida and he is guna get me set up with the right clutch, flywheel, bearings and everything to get it done, only issue is too figure out how I’m guna run build a setup for the clutch cable or try and do the hydronic way witch poses another problem because they never can that way.
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Old 03-14-2024, 08:54 PM   #15
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Since you are going diy check out the Mack truck air assist cable operated clutch system. They are very nice to use. They look somewhat universal in application.
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