| Author |
Message |
Lin
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 4:25 pm: | |
In continuance of my recent attempts to get to know my bus a bit better, I looked for numbers on the rear end and transmission. The rear end is Rockwell and says 6.83 on the tag. Am I correct in assuming that that is a low ratio; that it is not out for highway speeds? That would expain why first gear will not take me all the way through an intersection and top speed is just the happy side of 60mph.
The number stamped on the transmission is harder to read. It's got a NP or ND in a starburst which I guess is the manufactures logo, and then a casing number. It is a 5 speed with synchro. Any idea on what it is? Maybe there is another tag that I have not yet found. |
John Rigbyj
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 5:02 pm: | |
What type of bus do you have?? |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 5:41 pm: | |
does it have tatoos ??
that is your rear-end ratio...LOW...a stump puller...no top end...do some measureing,count bolt holes etc. you might find a better one in a truck junk yard...most big trucks are around 411...which would be a BUNCH better |
Lin
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 5:42 pm: | |
It is a 1967 GMC Superior Supercruiser with a V6 Toroflow. |
Lin
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 5:58 pm: | |
Two Dogs, the question would be does a person that owns such a bus have tattoos. The statistic declaring that a high percentage of rattlesnake bite victims are men with tattoos who get bitten on the hands and arms can be theoretically explained by saying many man with tattoos are high risk-takers and get bitten on the hands because they mess with the snake. We assume the snake does not discriminate. Although having this bus is not particularly high risk behavior, I do sometimes wonder if it does represent some cause for concern. |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 6:04 pm: | |
guess you are correct...I have tatoos...used to have rattlesnakes in fish aquariums...never bitten tho... |
Gary McFarland (Gearheadgary)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 6:14 pm: | |
Wow someone has a lower raio than me. Didn't think it possible.
Are there any statistis related to Tatoos and Axle ratios?
Gary |
Bruce Henderson (Oonrahnjay)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 7:28 am: | |
__. I have a question (sorry, I don't know anything about rattlesnakes or tattoos ...) about the transmissions of buses made in N America. Do these buses have a transmission that has a right-hand gear drive (or "bevel gear"), then a short drive shaft to the rear axle? With such a setup, the U-joint on the rear axle would be facing to the rear of the bus.
__. I ask this because my bus (made in England) has this kind of layout and I desperately need to raise the rear drive ratio. I'm told that the way that the bus manufacturer set up changing from "city" to "highway" overall gearing was the gearset in that "bevel" gear/output of the transmission. But parts kits to make this kind of conversion are no longer available.
__. I'm guessing that what I'll have to do is to find a compatible US-made rear axle and transplant it into my bus.
__. Thanks for the help.
Bruce Henderson, Wallace NC |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 8:59 am: | |
yep...you are correct,at least that's what I would do...if the engine is powerful enough...go down on the ratio..do alot of measureing & then go to a truck junkyard & see what they have..guess your bus has air brakes ( ? )if hyd..you woud be looking for a rear end out of a two ton truck... |
Gary McFarland (Gearheadgary)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 10:19 am: | |
The other option might be to install an overdrive unit, then you still have the have the pulling power.
Gary |
Gary Stadler (Boogiethecat)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 12:24 pm: | |
I've had two busses now that had horribly high rear end ratios. My current Crown has 5:29 back there.
In both cases I've found that transmission guys can swap gears around in the tranny to make it into an overdrive unit, and in both cases this has been the way I went. My first bus had a Clarke 94-V tranny and we changed it into a 94-VO by simply buying a few new gears for it during a rebuild- it was a 4 speed and the process basically made gear #3 into the overdrive gear. So shifting pattern was really weird (1-2-4-3)but it worked fine.
My current bus- I dumped the 4 speed and put in an Eaton RTX13609B 9 speed with overdrive. It's got a .73 overdrive in the final gear. The "X" option meant that the shift pattern wasn't messed up, so now instead of 61mph top I can get up to about 80, and the shift pattern is normal.
All in all for both of these busses, doing the ratio change in the tranny was less expensive than changing the rear end. I don't know why, but those things seem to be made of gold or something. |