| Author |
Message |
Larry Baird (Airhog) (159.115.177.40)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 09, 2004 - 5:35 pm: | |
I am thinking of making a change from from my 8V71 and a 4 speed to a 8V71T and a RTO 910 Roadranger. Any comments? Sound good? |
Henry R. Bergman, Jr. (63.224.197.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 09, 2004 - 6:13 pm: | |
And...if you really want to goes fast, find or convert to a RTOO-910 with two overdrives. |
Ron Walker (Prevost82) (209.52.245.237)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 09, 2004 - 9:49 pm: | |
I'm also thinking of a 10 or 13 speed. I haven't done any measuring as yet...10 speed length conpared to my 6 speed. The other thing that could be tricky would be the shifter box, on the front and there's a bus shifter box on the tran'y to move the shifter forks. Maybe someone that has installed one could give us an idea of the scope of work...I know busnuts have done it.
Ron |
gary Stadler (68.7.217.217)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 10, 2004 - 11:23 am: | |
I stuck a 9 speed in my crown... quite a bit different than your busses probably but a lot of the same problems arise...
First the clutch. My old 6 speed used a single plate disc clutch which everyone recommended I switch out to a 2-disc clutch. That usually requires changing out the flat flywheel and installing a "pocket" flywheel that can accomodate a dual plate clutch. Due to my oddball bellhousing I couldn't do that, so I ended up redrilling my flywheel and installing a Lipe dual plate clutch that works with a flat flywheel. It's actually a very good hi-tech ceramic-puck style clutch and it's SO easy to push the clutch pedal now (even easier than my honda car!)
Highly recommended.
Oh yeah.. there are two kind of clutch actuation schemes..."push" clutches and "pull" clutches...how the yoke actuates the throwout bearing, whether it needs to be pushed or pulled. Make sure you know which type you have and that it's compatible with your planned new one, or that you can change your clutch rod mechanism to the other type if your current one is the wrong type.
On to the tranny swap... First, my old tranny had a dual-rod arrangement for the shift levers. I removed all that and replaced the drivers' shifter with one from a truck junkyard that is "single rod" style. My shift pattern went from about a 2 foot sloppy throw in all directions, to about a 6 inch very nice 'n tight throw.
Next, the shift cover bolted to the top of the tranny stuck out one inch too far to the side and hit my frame rails. So I had to take it all apart and cut the aluminum housing down a couple inches, and also the inside shaft. I rewelded the cover and the shaft and reassembled it all, and now it fit perfectly. That was a bit of a challenge that required a lot of patience and a lot of precision machining, but it worked perfectly.
Last, the driveshaft needed to be cut 4" shorter. I took it to a driveshaft specialty house and for $100 had it shortened and balanced...a job I would NEVER recommend trying on your own due to the precision necessary in the balancing process. Make sure that if you have to cut your driveshaft that you don't violate the maximum angle allowable on the U joints. The driveshaft shop can tell you this info if you can't find it on your own.
Overdrive:
On Eaton overdrive trannys, there is an "X" option
(for example mine is an RTX13609B) that means the shift pattern has been rearranged to seem like a normal shift pattern even though it has overdrive.
So the X versions shift in a pattern that is hysically arranged like this:
1-2-3-4-5-6-7-8-9... Otherwise many "non-X" overdrive trannys will need to be shifted with a very strange pattern that may seem to go something like 1-2-4-3-5-6-7-9-8, etc
Have fun!
Gary |
john w. roan (Chessie4905) (69.162.21.219)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 10, 2004 - 6:00 pm: | |
If you find you will have a problem with linkage for your roadranger trans. and the usual single or double rod setups won't work; I have a Remote manual shifter setup for all Roadranger transmissions which I was going to use in a Brill that I had. It uses two Morse heavy Duty cables to operate. Very substantially built and makes trans installation a lot simpler.You can contact me for more information. |
Ron Walker (Prevost82) (209.52.245.237)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 10, 2004 - 8:33 pm: | |
Hi Gary, can you email me...I'd like to get more info.
Ron
P.S. put "Busnut" in subject line |
Bob Belter (67.121.4.233)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 12, 2004 - 12:01 am: | |
Ho, Larry,
I removed a 6v92t, and Allison DRD750 from my -01 Eagle, and installed a Cummins M-11 and Roadranger RTO1110. Your RTO910 is, I believe, pretty much the same critter. I'm very pleased with the performance of my bus. The ten speed gives you a "full set of teeth" for any condition. I had a chance to get a -near new - nine speed overdrive, and when I did the numbers, stayed with my ten speed, because of the closer ratios. The shift pattern which I have is as Gary described, 1 2 3 5 4 6 7 8 10 9. You get used to it right away, anyway. Sheesh, my shifter is on the left side. I'd never driven a ten speed, so I figured that it wouldn't make any difference where it was to learn. I DON'T have a shift pattern diagram in display, and I'd guess that my Eagle is one of the "less steal-able" busses around.
Enjoy/s/Bob |
RJ Long (Rjlong) (66.229.97.200)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 12, 2004 - 12:17 am: | |
Larry -
Yup, it sounds good. . . BUT:
You've got an MC-7 - there isn't enough room between the powertrain cradle's frame rails for the RoadRanger to fit - it's too wide. If it was an Eagle or a Prevost, you'd be OK, but not the MCI.
Then there's also the swap from stick to automatic - both the four-speed HT-740 and the five speed HT-754CR will fit.
If you decide to put a turbo motor in it, you'd better increase the cooling capability - sevens are notorious for their small radiators!
OTOH, "running the rack" might surprise you!!
HTH,
RJ
PD4106-2784
Fresno CA |
Ron Walker (Prevost82) (209.52.245.237)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 12, 2004 - 10:56 am: | |
Hey Bob, did you have to stretch the bus to get the M11 and RR RTO in? How did you attach the shifter to the trany?
Ron |
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