Reply
 
Thread Tools Display Modes
 
Old 08-07-2019, 08:45 PM   #1
Bus Nut
 
musigenesis's Avatar
 
Join Date: Jan 2019
Location: Philadelphia
Posts: 715
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466
Rated Cap: 65C-43A
Rear Diff Tags?

I discovered an envelope today in the cabinet thing above the driver's seat, labelled "Rear Diff Tags". Inside are two tags, one is about 1" x 3" and has the number "02122518" stamped on it. The other tag is about 2" x 4" and has this stuff stamped on it:

CUST PART NO. 3566878C91
RATIO 00617
SERIAL NO HN00904159
SPEC 0729411
PART NO 511345
MODEL 19060SIS (or maybe 19060NS or something)

Also has SPICER in the upper right corner.

Does this tell me anything about my bus? I still don't know exactly what type of transmission I have (I think my seller said it was an MD2050 but I can't find this anywhere; the mechanic who just looked at my bus said it was a 7000-series based on what was written on the transmission but I assume that's 2000-series).
__________________
Rusty 87 build thread
musigenesis is offline   Reply With Quote
Old 08-07-2019, 09:09 PM   #2
Skoolie
 
Bon Voyage's Avatar
 
Join Date: Dec 2016
Location: Calgary, Alberta
Posts: 113
Year: 2001
Coachwork: Thomas
Chassis: Freightliner
Engine: Cummins ISC 260/660
Rated Cap: 81
I’m thinking your gear ratio might be 6.17... which is good for stop and go not so good for highway speeds. My old bus had 6.14 but I could be wrong about yours.

I believe Spicer is a brand name for the differentials.

The transmission could be a MD3060 which is a fairly common trans and it’s a pretty good one. I’ve never heard of a MD2050.

How big is the bus and what engine?
Bon Voyage is offline   Reply With Quote
Old 08-07-2019, 09:17 PM   #3
Bus Nut
 
musigenesis's Avatar
 
Join Date: Jan 2019
Location: Philadelphia
Posts: 715
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466
Rated Cap: 65C-43A
Quote:
Originally Posted by Bon Voyage View Post
Iím thinking your gear ratio might be 6.17... which is good for stop and go not so good for highway speeds. My old bus had 6.14 but I could be wrong about yours.

I believe Spicer is a brand name for the differentials.

The transmission could be a MD3060 which is a fairly common trans and itís a pretty good one. Iíve never heard of a MD2050.

How big is the bus and what engine?
11 windows, DT466. The bus can do 65 and maybe faster (I think anyway - my one trip on the highway I was too nervous to notice my RPMs).
__________________
Rusty 87 build thread
musigenesis is offline   Reply With Quote
Old 08-07-2019, 10:57 PM   #4
Skoolie
 
Bon Voyage's Avatar
 
Join Date: Dec 2016
Location: Calgary, Alberta
Posts: 113
Year: 2001
Coachwork: Thomas
Chassis: Freightliner
Engine: Cummins ISC 260/660
Rated Cap: 81
It might say on one of your vin stickers what the transmission is. If it is a md3060 there’s a long thread about unlocking the 6th gear so you can get your rpm’s down a little on the highway. It’ll only bring them down a little though like from 2500 to 2250 or so.

On my old Thomas with the 6.14 rear end ratio the rpm’s were at 2500 when going 65 mph. If you notice it next time your out. Those rpm’s don’t make for good gas mileage unfortunately.
Bon Voyage is offline   Reply With Quote
Old 08-08-2019, 01:00 AM   #5
Bus Nut
 
Join Date: Sep 2015
Posts: 672
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
A 10% reduction in RPM at highway speeds is helpful for fuel mileage and general wear and tear on the engine.
Native is offline   Reply With Quote
Old 08-08-2019, 06:17 AM   #6
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 18,243
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by Bon Voyage View Post
It might say on one of your vin stickers what the transmission is. If it is a md3060 thereís a long thread about unlocking the 6th gear so you can get your rpmís down a little on the highway. Itíll only bring them down a little though like from 2500 to 2250 or so.

On my old Thomas with the 6.14 rear end ratio the rpmís were at 2500 when going 65 mph. If you notice it next time your out. Those rpmís donít make for good gas mileage unfortunately.
Pretty sure its a 2000 series.
My last bus had the same setup but with 5.29 and I wanted higher gearing.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Reply

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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:27 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.