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| | | | Joined: Jul 2009 Posts: 49 New Guy | | New Guy Joined: Jul 2009 Posts: 49 | 1949 Chevy Truck 3100 4 Speed Transmission
Okay, I have done all the testing and figuring and it is pretty much a given that I have a speedo gear problem. I can see wear marks on the teeth. It will catch occasionally but only for 10 seconds at a time. I found replacements on "Tim Tygart's Obsolete Chevy Parts Co." So how do I go about changing out the speedometer drive gear and the gear inside the transmission that turns it? I have never done anything like this before. | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | Which gear, the driving gear or the driven gear?
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Jul 2009 Posts: 49 New Guy | | New Guy Joined: Jul 2009 Posts: 49 | I have pulled the driven gear but need info on changing the driving gear. The one inside the transmission that turns the one that spins the speedo cable. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Not much help in the Shop Manual: Drive Gear - Step 17; Driven Gear - Step 19 It would be nice to see information from someone what has actually done this. I have a NOS pair of gears for use in a 1/2 ton with 6.50x16" wheels but have never figure out how/where to install the Drive Gear for use in a 1/2 ton with enclosed drive-shaft (in the transmission or on the u-joint yoke). | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | If its the worm gear, its in the front part of the tail shaft. The transmission has to be disassembled. Its very seldom that they go bad. I would look in the hole with a flashlight before I would tear the whole transmission apart. Tim, I sent an email to the address in your profile. | | |
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