Thread Tools Display Modes
Old 08-13-2005, 03:18 PM   #1
New Member
Join Date: May 2005
Location: High Point NC
Posts: 4
Year: 1968
Coachwork: Wayne
Engine: Chevy 350 (1980)
Transmission and tire questions

I recently completed my maiden voyage and shakedown cruise on my '69 Chevy skoolie with an '80 350 V8. Aside from a couple of small problems (ie flat tire and bad coil) which popped up, it was quite fun!

Of course now that things are shaken down, i have a couple of questions...

First: I've got a 5 speed manual, and the syncros are going. I can double-clutch no problem, but sooner or later, i'll need to either rebuild or replace. If I replace, is it possible to get a tranny (used of course) with a better gear ratio? If this is possible what would be a good ratio to increase highway speeds? Don't know what mine is, but i'm not getting real good highway speeds, about 55mph. Could go faster, but the RPMs are pretty high already.

And second: My tires. I've read the chock-full-of-info Wheel FAQ, but i just gotta get this clear. I've got 9R20s (tube tires) on split rims. Tires need to be replaced. Can I upgrade to tubeless tires on the same rims? If so would i be looking for a 10.5R22.5?

Many thanks,
deschste is offline   Reply With Quote
Old 08-14-2005, 04:07 AM   #2
Bus Nut
Roasting8's Avatar
Join Date: Dec 2004
Location: Atlanta, Georgia
Posts: 382
Year: 1981
Coachwork: Crown
Chassis: Crown
Engine: 671 DD
Send a message via MSN to Roasting8 Send a message via Yahoo to Roasting8
Welcome Steve,

The only way that you're going to change the top end on your bus is by either getting an overdrive transmission or changing the gear in your rear axle. Most likely your axle has the ratio stamped on it and you would have to go from a higher number to a lower number (example: 4.65 to 3.90). The thing you've got to watch out for is that you'll lose pulling power and you'll feel it when you're climbing hills, but if your bus has enough power, that you can live with, you should be able to do it.

As for the tires; you're going to have to change rims if you're going for 22.5 tubeless tires.
Roasting8 is offline   Reply With Quote
Old 08-16-2005, 07:55 PM   #3
Bus Crazy
Join Date: Oct 2004
Location: New England
Posts: 1,009
Year: 1993
Coachwork: Ward Genesis
Chassis: International
Engine: DT466/MT643
Rated Cap: 77
A 10R22.5 is the same height (+/- an inch) as a 9.00-20. However, that reqwuires 6 new wheels...pricey. I'd get 9.00R20 tube radials--probably either new tires or good take-offs in front, and take-offs or Bandag retreads in back.
Optimism is a mental disorder.
Jarlaxle is offline   Reply With Quote
Old 08-20-2005, 11:41 AM   #4
New Member
Join Date: May 2005
Location: High Point NC
Posts: 4
Year: 1968
Coachwork: Wayne
Engine: Chevy 350 (1980)
Thank you for the tips gentlemen! I guess i'll go look for some new tires and just get used to double-clutching for a while. With my 350 engine already feeling a bit weak, I guess I shouldn't go changing the gear ratio right now. Maybe when I get a new engine! (Hah!)

deschste is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
RV tire blowout wmkbailey Everything Else | General Skoolie Discussions 0 09-04-2013 09:28 AM
Engine and Transmission Questions - looking at two busses bansil Mechanical and Drivetrains 19 07-29-2013 08:39 PM
Tire Pressure? TygerCub Conversion General Discussions 20 07-19-2012 07:11 PM
Tire Protection? hoser Everything Else | General Skoolie Discussions 4 07-03-2008 11:22 PM
Tire Thumping. What is it and should I do it? busone Conversion General Discussions 5 10-12-2005 03:52 AM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:50 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.