| Author | Message | ||
| Benjamin Edge (Busnut1981)
Registered Member Username: Busnut1981 Post Number: 5 Registered: 10-2007 Posted From: 24.22.90.139 Rating: N/A |
Has anyone ever used a 10-speed Fuller Roadranger transmission (e.g. RT-910, RT-11610) behind their 6V-92TA or 8V-71N powered MCI bus? | ||
| Larry Baird (Airhog)
Registered Member Username: Airhog Post Number: 168 Registered: 1-2001 Posted From: 75.208.201.5  Rating: N/A |
I just put a RTO and a 8V71T in my MC-7, nice combo but a little tall with 11R-24.5s | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 92 Registered: 2-2009 Posted From: 71.139.244.152  Rating: N/A |
Don't forget, there are different internal ratios on most of the 9/10 speeds. | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 107 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
9 or 10spd will work well-if you know how to shift it. I would use a 7spd overdrive-then you don't have to contend with the air powered splitters. The 7spd will have more then enough gear splits for bus use. Good Luck, TomC | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1593 Registered: 12-2000 Posted From: 98.192.173.82  Rating: N/A |
Ben - Why? | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 982 Registered: 11-2005 Posted From: 208.54.200.120  Rating: N/A |
I agree with Tom, 10 speeds are way overkill for a bus.. Six are probably plenty and seven are even better. | ||
| Larry Baird (Airhog)
Registered Member Username: Airhog Post Number: 169 Registered: 1-2001 Posted From: 63.77.108.210 Rating: N/A |
I went from a 4 to a 10 speed RTO-910 and I can not speak for the 6 or 7 speed but unless you have driven a 10 speed in a bus you know not what you speak of, best answers come from experience. I have a new 740 less torque converter for a good price for you non shifters. | ||
| Paul Lawry (Dreamscape)
Registered Member Username: Dreamscape Post Number: 539 Registered: 5-2007 Posted From: 64.40.215.143  Rating: N/A |
Larry, How did you do the shifter? I really want to go that route someday. Currently have a 4 speed crash box and would like more gears. Paul (Message edited by dreamscape on August 05, 2009) | ||
| Larry Baird (Airhog)
Registered Member Username: Airhog Post Number: 170 Registered: 1-2001 Posted From: 63.77.108.210 Rating: N/A |
I used the complete setup out of a 70's Prevo, ran it down the floor walkway then covered it to make the floor flat. also ran the plastic air line and pyro wires. I cut a hole in the floor about a foot from the back on the left and ran the conection rod down to the trans. | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 879 Registered: 7-2006 Posted From: 75.209.81.156 Rating: N/A |
Gus...not sure I can agree on that. I use all 10 on most trips...at some time or another during the trip....9 and 10 most always, 8 and sometimes 7 in town, depending on traffic and grade, 5 and 4 from second, then mostly to 6.... First gear seldom used...second is usually start gear....on the flat, of course. The 10th gear is what gves us such good (10-12) fuel mileage, IMHO. FWIW  RCB | ||
| Kevin Black (Kblackav8or)
Registered Member Username: Kblackav8or Post Number: 129 Registered: 8-2005 Posted From: 24.22.254.95 Rating: N/A |
A 13 speed actually has the most versatility and allows you to split the top gears without moving the shifter. Gives you that small step down when climbing a hill without moving the lever. Nothing says you have to hit all of them on the way up or down. You can start in 5th and only make about 4 or 5 lever moves to be in top gear but those lower gears and splits will come in handy at times along with reverse options. They are also very common. A 14613 would be both unbreakable and quiet in a coach. The 12513's tend to get noisy in overdrive after they are worn. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1593 Registered: 10-2003 Posted From: 71.58.110.9  Rating: N/A |
Go for the double overdrive...since the coach is light compared to a loaded truck, you won't miss the slight loss in low gears ratio. | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 95 Registered: 2-2009 Posted From: 70.135.57.202 Rating: N/A |
FWIW, double over in 13s is pretty hard to find, was not that common in the older 13s. Some of the newer 18s have double over. Generally speaking, the overdrive ratio in a 9 or 10 is going to be lower numerically than a 13 speed. And the 9/10 is shorter than a 13. Forgive my ignorance here, but I thought that most buses were limited in the amount of room they have for longer transmissions...I'm coming from a truck background and am still learning my way around here. Okay, set me straight..... | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 886 Registered: 7-2006 Posted From: 75.210.189.121 Rating: N/A |
I think you did awready... ...us too> RCB | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 96 Registered: 2-2009 Posted From: 70.135.57.202 Rating: N/A |
I guess I'm still not clear on what coaches have the physical room/length for a longer transmission, and what about the shift pattern? Forget about V drives. | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 990 Registered: 11-2005 Posted From: 208.54.200.113 Rating: N/A |
RC, I guess my opinion is based on a few years driving an 18 wheeler which only had a 9 sp. It could have used 10 but didn't really need more than that. We always tried to avoid so much shifting so the idea of having 10 speeds in a bus is a bit too much. If you just love having all those speeds more power to you. I don't mind shifting but I do have my limits before it ceases to be fun!! With one very low gear for unusual situations, one gear close to top for hill climbing and the correct top gear for cruising that only leaves two or three more that are necessary for most buses. Even with a truck 9sp we seldom used first except when fully loaded. The only bad part was the wide spacing between 8-9, it slowed us too much on hills. I think a ten speed covers that hole. I have a 10 sp antique Dodge C900 tractor but have driven it very little, never loaded. | ||
| Larry Baird (Airhog)
Registered Member Username: Airhog Post Number: 171 Registered: 1-2001 Posted From: 71.95.226.178 Rating: N/A |
300 rpm splits and over 100 mph in 10th (OD) 11R24.5s..... Hot Dang was that a MC-7? (Message edited by airhog on August 09, 2009) | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 888 Registered: 7-2006 Posted From: 75.208.81.25 Rating: N/A |
Hi, Gus...no I don't like all the shifting and have therefore...more or less...figured out what is necessary in most circumstances. Traffic situations, when one sometimes doesn't get the time to "think things thru" are the times when a three speed would be just fine, thank you I agree with you... but am glad to have the "redundancy" of a Fuller RR; fine transmission from my point of view! Have a good Lord's day. RCB | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1595 Registered: 10-2003 Posted From: 71.58.110.9 Rating: N/A |
I changed an RT9509 to an overdrive and added a 13 speed overdrive rear section to make mine. Bought new top gears for front section, although I've read that the old gears can be swapped around in the front section to make it an overdrive, but may be noisy because of the different wear pattern created. Mine was nice and relatively quiet with the new gears. Stock RT00's are few and will require some looking. Also the shift pattern is reversed in top two gears when you make this change, unless you get the RTOX top cover, which uses a couple extra internal levers to accomplish it. You can now buy roadranger auto shift models that only require the clutch to start out. One model doesn't even need clutch activation. When they make an angle drive version of this, I'll have one. | ||
| David Guglielmetti (Daveg)
Registered Member Username: Daveg Post Number: 100 Registered: 2-2009 Posted From: 71.139.244.152 Rating: N/A |
Does anyone want to contribute to which coaches can take a 9/10 speed based on physical length/space? | ||
| Tim Brandt (Timb)
Registered Member Username: Timb Post Number: 411 Registered: 10-2003 Posted From: 74.244.14.221  Rating: N/A |
I would be glad to measure the Flx. What is the length of a 9/10 speed. I haven't ruled this project out yet so I need to take the measurements anyways. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1604 Registered: 10-2003 Posted From: 71.58.110.9 Rating: N/A |
RT,RTO,11609 and 11610 transmissions are 28.9 inches. Length is installation dimension from face of clutch housing to front bottoming surface of companion flange or yoke. RT, RTO, RTOO 11613 is 32.1 inches. weight is about 600 lbs for 9 and 10 speeds; 660 for 13 speeds. These figures are for a #1 bell housing The weight of the housing needs to be added to total of either trans- alum- 23lbs, cast iron 76lbs. The 11 part of the number refers to torque capacity- 1150 lbs.-ft. Remember that this is rating for a vehicle hauling 80,000 lbs. Would handle more torque in our vehicles. |