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| | | | Joined: Jan 2016 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2016 Posts: 246 | Been doing some reading on my speedometer not working after tranny rebuild. ..The articles I read said the drive gear is pressed on to the main shaft but when I was taking the tranny apart I just pulled the drive gear off with my fingers and when I installed it again I just slid it on. So, if it should be pressed into place, why did I have a working speedo before the tranny rebuild ?
The tranny I have is believed by me to be a 318.
it has a 4 bolt side cover with the numbers 3686832 GM
The main case is stamped 591615.
Anyone have any thoughts before i pull this tranny back out while on my back and with the truck on jack stands.????????
1953 chevy 1/2 ton with 3 speed 318 on floor and 1955 235 engine
| | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | Zoe, I don't have an answer to your question but a suggestion for ease of answering your posts. Go into your profile and post the year and model for your truck. It makes it easier for the gurus to give the needed answers without having to ask extra questions themselves. Just a friendly suggestion not a critique for your posting style.🤓
Martin
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'47 Chevy 3100 5 Window (long term project)
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| | | | | Joined: Jan 2016 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2016 Posts: 246 |
1953 chevy 1/2 ton with 3 speed 318 on floor and 1955 235 engine
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | On the main shaft directly behind the rear bearing there should be a spacer (about 1/4" long) then the speedo drive gear, then the long pipe spacer, and last the yoke. If nothing is worn the bolt that holds the yoke to the main shaft should pinch all the pieces tight together so all parts turn with the shaft.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jan 2016 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2016 Posts: 246 | Dave....I now understand that the drive gear does "not have to press fit " as I had heard on youtube.
On close inspection I saw that the 1" bolt that holds the yoke to the main shaft was missing. I did not remember removing it but I must have. That missing bolt explains a lot and may cure my problem of the drive gear not lining up with the driven gear...the drive gear looks buggered up so I may need to obtain a new one if available.....I Will keep you posted.
1953 chevy 1/2 ton with 3 speed 318 on floor and 1955 235 engine
| | | | | Joined: Jan 2016 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2016 Posts: 246 | Pre 68 Dave.....your post solved my issue because you listed all the parts that would be inline to secure the drive gear in place and that all is held tightly together with that bolt. I had presumed that the drive gear was supposed to press on to the main shaft and could not figure out why it just slid on...........a special thanks to you...
1953 chevy 1/2 ton with 3 speed 318 on floor and 1955 235 engine
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 |
See the USA in your vintage Chevrolet! My Blog | | |
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