| Author |
 Topic Search  Topic Options
|
BuckSkin 
Orange Level
Joined: 12 Sep 2019
Location: Poor Farm
Points: 630
|
 Post Options
 Thanks(0)
 Quote  Reply
 Topic: Eaton 2-Speed ???
Posted: 16 Apr 2025 at 10:22pm |
Sunday_13-April-2025
Greg's New C-65 Chevrolet
 - --- - 
 - --- - 
1975 w/427 and Air-Brakes
Please take note of the shifter-pole and the gear knob.
Of all the many trucks I have driven, I have never before seen an Eaton 2-Speed.
The engine is a Big Block 427 Gasoline
The bell-housing and transmission are HUGE.
Can anyone please tell us just what we have here as neither of us have ever seen one before.
If the pole is "five-speed" and then split, one would think it a 10-speed; however, every Eaton 10-speed I have ever driven (I hate them, by the way) has the T-handle range selector clamped on the pole and no button on the knob.
What do we have here ? Thanks.
Edited by BuckSkin - 9 hours 28 minutes ago at 10:39pm
|
 |
|
Sponsored Links
|
|
|
DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33097
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 4:01am |
The truck had been a Tandem at one time, had TWO Eaton Two Speed differentials shifted with Air not Vacuum or Electric, where in the 1970s there was a Attempt to make the two Individually capable of being shifted independently, IE Eaton Three Speed Rears. Heavier gear box and bell housing was for that tandem load rate.
BTW Ford Super Duty 750/850 series were well known for the three speed setup, converted a great many to two speed control.
As a Add, 90% of all the HD Road Trucks had Eaton Fuller 8, 9, 10, 13 or 18 speed transmissions. Learned to drive those in Freightliner Cabover with a 13. Easy as Pie.
Edited by DMiller - 17 Apr 2025 at 4:03am
|
|
Codger
Orange Level
Joined: 23 Dec 2020
Location: Utopia
Points: 2185
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 6:15am |
|
Seen that setup on a couple of GM, and Ford products back in those days. Never did like it myself as when one shift set was worn, something got into a bind, (think driving two rear axles at different ratios) the result was usually destructive to drivelines. Usually behind a "Spicer" five speed transmission. Never seen the setup in diesel; always gasoline powered units being usually fertilizer, or fuel delivery trucks.
|
|
That's All Folks!
|
|
Lars(wi)
Orange Level Access
Joined: 14 Sep 2009
Location: Permian Basin
Points: 7673
|
Post Options
Thanks(2)
Quote Reply
Posted: 17 Apr 2025 at 6:58am |
|
Best thing to do is, crawl under the truck and read the model number on the side of the transmission, then you know for sure what it is.
I myself, have operated a plethora of Eaton transmissions over the years, straight 5, 6, 7, 5+2, 8, 9, 10(the most common at the time), 13, 18(one my fav), and the Super 10. The worst is the Eaton Auto-Shift, absolutely miserable to use.
Edited by Lars(wi) - 17 Apr 2025 at 6:59am
|
|
I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
|
|
DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33097
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 7:12pm |
|
|
|
Codger
Orange Level
Joined: 23 Dec 2020
Location: Utopia
Points: 2185
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 7:47pm |
|
Those worked well; for a while till the wear set in and as mentioned, catastrophic failure. Usually replaced by two speed axles, or a 10 speed trans and single speed rears.
|
|
That's All Folks!
|
|
HudCo
Orange Level
Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3760
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 8:02pm |
|
looks like its missing some real importent parts
|
|
BuckSkin
Orange Level
Joined: 12 Sep 2019
Location: Poor Farm
Points: 630
|
Post Options
Thanks(0)
Quote Reply
Posted: 17 Apr 2025 at 8:16pm |
 HudCo wrote:
looks like its missing some real importent parts |
Them necessary pieces not shown in the photo are piled up on the other side of I guess that thing is a pontoon boat.
|
|
BuckSkin
Orange Level
Joined: 12 Sep 2019
Location: Poor Farm
Points: 630
|
Post Options
Thanks(0)
Quote Reply
Posted: 17 Apr 2025 at 8:19pm |
Do any of you guys know that truck ?
It belonged to Fritz's Garage and Towing of Lorain, Ohio; it had a huge wrecker bed with four big winches.
|
|
Codger
Orange Level
Joined: 23 Dec 2020
Location: Utopia
Points: 2185
|
Post Options
Thanks(1)
Quote Reply
Posted: 17 Apr 2025 at 8:39pm |
|
Don't know the truck at all but in those days there weren't that many diesel trucks in medium duty service.
|
|
That's All Folks!
|
|
DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33097
|
Post Options
Thanks(1)
Quote Reply
Posted: 18 Apr 2025 at 2:42am |
|
As Codger noted most of those days were Gas, 429 & 534 Ford, 366 & 427 GM, 504 & 549 IH, Dodge had the Industrial Hemis’. Massive Gas swillers.
|
|
DaveKamp
Orange Level Access
Joined: 12 Apr 2010
Location: LeClaire, Ia
Points: 5951
|
Post Options
Thanks(2)
Quote Reply
Posted: 18 Apr 2025 at 9:34pm |
Don't forget the GMC 478 V6... 
|
|
Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
|
|
PaulB
Orange Level
Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4926
|
Post Options
Thanks(2)
Quote Reply
Posted: Yesterday at 4:00am |
|
Or the GMC V12 gas truck engines. Hyattstown, MD. purchased 3 early 60s tilt cab trucks, 2 pumpers and a HD rescue when the new interstate was built north out of Washington DC. With their station located right at the end of an exit ramp, those 3 new trucks had specifications to be able to reach and maintain at least 100MPH even in the grades. Fuel mileage wasn't even an issue. Gas at that time was under $ .25 a gallon and those trucks had 2, 50 gallon tanks.
|
|
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
|
|
DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33097
|
Post Options
Thanks(0)
Quote Reply
Posted: 34 minutes ago at 7:33am |
|
GM V6s were a Major PITA to work on, the 12s just added a second engine to that forest fire. Spark Plugs in Engine Valley, shorter ignition circuits but also legendary garbage trough for debris to fall into opened holes and corrosion around plug threads. Mice and other rodents built nests like Ft Knox as those sat starting lots of fires. Could not keep Exhaust Manifolds on them for long.
|
|
