| Author |
Message |
John morrison (205.188.209.11)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 01, 2002 - 3:45 pm: | |
I own a 1966 MCI 5A and I have heard that you can replace the 4 speed trans with a 10 speed Fuller and was wondering if anyone has done or knows someone who has done this. Any and all info would be great thanks in advance.
JOHN |
RJ Long (Rjlong) (24.127.74.29)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 01, 2002 - 4:50 pm: | |
John - Lots of problems with this swap, plus a question:
~ 10-speed Fuller is longer than 4-spd Spicer. Driveshaft has to be shortened, with the resulting increased angles on the U-joints leading to earlier failure.
~ 10-speed Fuller is wider than 4-spd Spicer. Frame rails must be cut to allow clearance, then reinforced.
~ 10-speed shift pattern will be backwards in a pusher powertrain configuration.
~ Shift linkage from underfloor by driver to transmission will have to be refabricated, as the Fuller and Spicer use different setups (dual vs single).
~ Do you REALLY want to shift thru seven gears just to get to 35 mph? Especially when stuck on a major US city's freeway system during commute time? (Think of Los Angeles, which has the world's largest parking lot at 4:30 pm, M-F.)
~ An MT640 series Allison automatic will fit in the space available, is much more flexible in all speed settings, and will allow mama to be more willing to drive. . . (The HT series Allisons will not fit with the 8V71 engine - too long.)
~ What's wrong with the 4-spd? For over 40 years, the 4-spd has been THE workhorse transmission of the bus industry, until the massive changover to automatics starting in the mid/late '70s. And that changeover primarily took place because the highway automatics finally became virtually as fuel-efficient as the manual, plus they substantially reduced training costs for a generation of new drivers that really weren't that familiar with stick shifts, let alone how to shift them properly.
BTW, the most common powertrain swap into a 5-series MCI is the 6V92TA Detroit w/ an HT740 Allison. Tweak the 6V to 350hp, and you'll be able to keep up w/ the 500hp, 50K lb Prevost big boys.
HTH,
RJ
PD4106-2784
Fresno CA |
neil (198.81.26.174)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 02, 2002 - 6:36 am: | |
Better yet switch to a 400 HP 6v92 and a 654 (5speed) allison automatic and you will be able to go as fast as your wife will let you drive |
Jojo Colina (Du1jec) (68.8.172.117)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 02, 2002 - 3:01 pm: | |
Needless to say with all these High HP repowers special attention needs to be paid to the cooling system on the MC-5 to ensure that you are actually able to use all your new HP. |
John the busboy (12.73.162.153)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 02, 2002 - 6:54 pm: | |
You could try a 5 speed Eaton. The 11605 is short and has several different gear ratios, including overdrive ratios.
John the busboy |
Henry R. Bergman, Jr. (Henryofcj) (63.224.197.10)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 03, 2002 - 10:00 am: | |
I have no idea if a 10-speed will fit into your coach. Do know that the Fuller RTO-910, which I have, is a very large long and wide transmission.
The Fuller (Eaton) 5-speeds are also very wide, but much shorter than a 10-speed, but the same concerns already outlined above would still exist.
Maybe too wide for your application and yea, the shift pattern would probably also remain reversed. Lots of changing and stuff required.
If you REALLY want a Roadranger, hold out for the older RT-910 or RTO-910 model. However, having said this, understand that it may be a lot of work. Thanks. |
|