| |
BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
| | Click on image for the lowdown. 
====
| | |
7 members (cmayna, festerhairball, Peggy M, Ponchogl, homer52, Leo, Gdads51),
528
guests, and
1
robot. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics126,777 Posts1,039,264 Members48,100 | | Most Online2,175
Jul 21st, 2025 | | | | Joined: Feb 2008 Posts: 212 'Bolter | | 'Bolter Joined: Feb 2008 Posts: 212 | I have a 58 3100 and recently replaced my standard 3 speed with an overdrive unit. My speedometer does not work now. Is there a difference between the two speedometer gears. The overdrive gear was missing so I used the one from the standard 3 speed. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | there may be a ratio difference because the OD came with a 4.11 rear rather than 3.90, but shouldn't be a difference to prevent turning ... the fact that it was missing may mean someone else had a problem someplace further inside ... are you sure you got the cable back on properly engaged at both ends?
Bill | | | | | Joined: Feb 2008 Posts: 212 'Bolter | | 'Bolter Joined: Feb 2008 Posts: 212 | It was never removed at the instrument cluster only at the transmission. After it did not turn while driving I found after removing the overdrive speedometer gear housing there was no gear inside. I then replaced the entire assembly with the complete assembly from the original three speed and it still does not turn.Does the overdrive lever have to be engaged when the gear is installed? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the procedure in the shop manual is the same for both transmissionsBill | | | | | Joined: Apr 2005 Posts: 2,066 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,066 | The 3 speed speedometer drive gear and some early driven gears will not work on an OD trans. The OD uses a wider gear as it also runs the governor. If your original 3 speed trans used the steel driven gear it will not work with the OD spedo drive gear. You will need to get the correct OD drive gear and a plastic driven gear.
I think I'm using a 22 tooth driven gear for the 3:90 rear end.
Fred
Last edited by rfs56trk; 09/03/2013 12:18 PM.
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | |
|
|
| |
