speedo cable drive gear
- macswoods
- Posts: 313
- Joined: May 4th, 2009, 1:20 pm
- Body Type: 82-A
- Model Year: 1929
- Location: Wilhoit, Arizona
speedo cable drive gear
My 29 AA (early November) has a speedo drive gear marked 6.6-1 with 17 teeth. It has a oval speedometer and a bevel
gear rear axle. I think it is high speed. Is this drive gear correct ?
gear rear axle. I think it is high speed. Is this drive gear correct ?
-
- Posts: 1442
- Joined: April 24th, 2003, 11:50 am
- Body Type: Mail truck, Stake tr
- Model Year: 1931
- Location: SO CAL
Re: speedo cable drive gear
The high speed gear is marked 5.14
I think the picture is Neal's.
Bob
I think the picture is Neal's.
Bob
- Attachments
-
- speedometer gears.jpg (33.02 KiB) Viewed 4559 times
- 1crosscut
- Posts: 877
- Joined: December 25th, 2010, 7:22 pm
- Body Type: 82-A
- Model Year: 1929
- Location: Lincoln, NE
Re: speedo cable drive gear
If you want to find out if your rear end gears are high speed jack up one rear wheel, put truck into third gear, rotate engine with crank one full turn. If the wheel off the ground turns just a hair over three revolutions it is a high speed. Any more than that it is low speed.
------------
Dave
Dave
- Chris Haynes
- Posts: 2203
- Joined: September 7th, 2003, 5:18 pm
- Body Type: 82A
- Model Year: 1930
- Location: Camarillo, CA
Re: speedo cable drive gear
Crosscut. It is a lot easier to read the ratio from the speedo drive gear.
- 1crosscut
- Posts: 877
- Joined: December 25th, 2010, 7:22 pm
- Body Type: 82-A
- Model Year: 1929
- Location: Lincoln, NE
Re: speedo cable drive gear
True... but the speedo gears may not always be correct and others might benefit from a different way of checking a rear end.Chris Haynes wrote:Crosscut. It is a lot easier to read the ratio from the speedo drive gear.
------------
Dave
Dave
-
- Posts: 478
- Joined: June 3rd, 2013, 6:15 pm
- Body Type: 186-B stake
- Model Year: 1931
- Location: LHC Arizona & UP Michigan
Re: speedo cable drive gear
Dave, don't you mean High Gear, which may be either third or fourth.
- 1crosscut
- Posts: 877
- Joined: December 25th, 2010, 7:22 pm
- Body Type: 82-A
- Model Year: 1929
- Location: Lincoln, NE
Re: speedo cable drive gear
I was assuming that the original post was refering to a worm drive rear end. Third gear was the high gear in those trucks.ModelAkid wrote:Dave, don't you mean High Gear, which may be either third or fourth.
I don't think that this method works with the 30/31 trucks with bevel rear end and 4 speed transmission.
------------
Dave
Dave
-
- Posts: 478
- Joined: June 3rd, 2013, 6:15 pm
- Body Type: 186-B stake
- Model Year: 1931
- Location: LHC Arizona & UP Michigan
Re: speedo cable drive gear
AA four speed transmissions came out around mid-1929.
- gunmetal 2
- Posts: 222
- Joined: April 1st, 2013, 12:51 pm
- Body Type: 82-A
- Model Year: 1929
Re: speedo cable drive gear
My 8-30-29 has 3 speed transmission with worm gear rear end. with high speed rear end with the low speed gear in the torque tube.
-
- Posts: 478
- Joined: June 3rd, 2013, 6:15 pm
- Body Type: 186-B stake
- Model Year: 1931
- Location: LHC Arizona & UP Michigan
Re: speedo cable drive gear
Correcting myself: The Judging Standards say the AA 4-speed transmission began in October '29, not mid-29. I had a June '29 AA with a 4-speed tranny but someone must have changed it, probably when the 1930 engine was installed in it.
-
- Posts: 1223
- Joined: June 14th, 2007, 7:29 pm
- Body Type: Grainbox
- Model Year: 1929
- Location: Illinois
Re: speedo cable drive gear
if the 4th gear in the 4 speed is a 1:1 ratio it will be the same as the 3 speed's 3rd which is a 1:1 ratio.