Does anyone have a Muncie 4 speed speedo gear ? I think they are same for some auto trans.. My auto 350 trans had a large (strange to me ) gear.. I am running 2.73 in 12 bolt, but dont know for sure, which gear I will end with .. Just need one for now, to hold oil in..... I have the bullet, that houses the gear... anyone? anyone? BEULLER? Carl #2
The gears for a 400 trans are still available from the local Chevy dealers. I just bought a couple about 2 months ago. The gears for the Muncie may still be available. James
Is there a chart available somewhere that shows all the speedo gears and part numbers and their application? I think I saw one years ago in a Chevy parts manual at a swap meet. I assumed it would be in all parts manuals but when I got home and checked mine, that section was not there. I know that different colours signify different ratios. I need the correct gear for a THM400 for a 3.31 rear end; I've just got to upgrade from those lazy 2.56 highway gears!
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Hillar
1970 LS4 (eventually an LS5) Laurentian 2dr hdtp -and a bunch of other muscle cars...
Great link, thanks. Now does anyone have a GM parts number list for all of the different coloured gears? If I went into my local GM dealer and just asked for a purple gear with 13 teeth, I think they might look at me a little funny?
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Hillar
1970 LS4 (eventually an LS5) Laurentian 2dr hdtp -and a bunch of other muscle cars...
Great link, thanks. Now does anyone have a GM parts number list for all of the different coloured gears? If I went into my local GM dealer and just asked for a purple gear with 13 teeth, I think they might look at me a little funny?
Here's the info for the manual trans speedo gears with GM part numbers. I have not checked if they are all current numbers but they should have the supercede numbers if not.
Tooth count - color - gear ratio - part number 18 - brown - - 3987918 19 - natural - 3:07 - 3987919 20 - blue - 3:08 - 3987920 21 - red - 3:31 - 3860344 22 - green - 4:10 - 3860345 23 - black - 3:55 - 3860346 24 - yellow - 3:73/4:56 - 3860347 25 - orange - - 3860348
No such luck finding charts. I know I have them for later years, like 70's or 80's but some of those had different drive and driven gears for the speedo.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Thanks you Brad & Carl I am sure many of us have printed these off for reference.. They will help me to finish car, if I ever get to it again!.. My spouse and I had a serious discussion , regarding my hobby,after she got involved in a Ventura II i was bidding on yesterday.. Looks like its time to clean out the garage.. Guess I getting a new hobby...
Great link, thanks. Now does anyone have a GM parts number list for all of the different coloured gears? If I went into my local GM dealer and just asked for a purple gear with 13 teeth, I think they might look at me a little funny?
Here's the info for the manual trans speedo gears with GM part numbers. I have not checked if they are all current numbers but they should have the supercede numbers if not.
Tooth count - color - gear ratio - part number 18 - brown - - 3987918 19 - natural - 3:07 - 3987919 20 - blue - 3:08 - 3987920 21 - red - 3:31 - 3860344 22 - green - 4:10 - 3860345 23 - black - 3:55 - 3860346 24 - yellow - 3:73/4:56 - 3860347 25 - orange - - 3860348
I have a picture of gear, from 350 turbo that was in Strato Chief Dont know what division the trans was from. I have 4 speed bullet to go in Muncie, so I could just. stick the cable on, and not worry about speedo, until I put gers in the rear. I need to install the bullet , to hold in the fluid...I (thanks to you guys), can order a 4 speed gear for 2.73/3.08 and it will do. I am running 27 inch tall tires. Still have Pontiac .. gear has 36 teeth
the sheets show the 2.73-3.07 gear the same for Muncie and 350 turbo 3987919 but if you look at the monster gear out of my 350 trans. What should I order? anyone have a picture of proper size gear?
I just went back and did a speed read of this post, but can't see that you've ever posted how many teeth on your drive gear that was in your TH350, or in your Muncie.
Did I miss it, or do you know those numbers?
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
I have a picture of gear, from 350 turbo that was in Strato Chief Dont know what division the trans was from. I have 4 speed bullet to go in Muncie, so I could just. stick the cable on, and not worry about speedo, until I put gers in the rear. I need to install the bullet , to hold in the fluid...I (thanks to you guys), can order a 4 speed gear for 2.73/3.08 and it will do. I am running 27 inch tall tires. Still have Pontiac .. gear has 36 teeth
