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#21
07-27-2005, 05:42 PM
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Re: Muncie Speedo Gear Question
[ QUOTE ]
What color gears did you find that were close? Paul [/ QUOTE ] Sorry Paul, memory isn't that good. Also, at that time, it wasn't the most important thing in the world so it doesn't stick in your mind.
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Specialized Chevrolet Decals 
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#22
07-27-2005, 06:10 PM
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Re: Muncie Speedo Gear Question
THE GM PARTS BOOK SHOWS
6261784 8T DRIVE NATURAL 3987920 20T DRIVEN BLUE THE OTHER LISTING WITH AN ADADPTOR IS FOR A CHEVELLE MIKE
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#23
07-27-2005, 07:05 PM
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Re: Muncie Speedo Gear Question
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The adapter on our Chevelle has the white gear and is stamped 666F N8. I can only read the last two numbers on the next line "33". [/ QUOTE ] Probably .7333 or .8133. I have a couple of those here to try to match up to my COPO. I've also managed to secure this cool bundle of parts to allow me to make up whatever ratio I end up needing...    I've seen lots of the SW versions but never an AC version, which Ed C. is supposed to have come on the car. Anybody got a picture?
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Jeff M. ZL1 #49 (Dale, Waukesha WI) Super Stock restoration by SCW; 9561AA (Walters, Hebron OH) Super Stock motor by the Grump
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#25
07-27-2005, 07:52 PM
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Re: Muncie Speedo Gear Question
CHEVELLE ADAPTOR #3932220 STAMPED .7333-A
# 3890575 STAMPED .8319 #3925673 STAMPED 1.1111-V MIKE
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#26
07-27-2005, 09:28 PM
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Re: Muncie Speedo Gear Question
Wow, I think my head is going to explode. I opened up a can of worms on this one!
I guess I will try what I have and see how far off it is, then make adjustments later. 69L78 - Do you have a number on your adapter since you have the same gears and trans # as mine? Thanks, Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
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#29
07-28-2005, 02:58 PM
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Re: Muncie Speedo Gear Question
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The adaptor # is 6476736 with a 1:.777 ratio and I believe the gear is a blue one with 20 teeth. [/ QUOTE ] Can you post a pic of the adapter? That sounds like the AC part number that Ed C. quotes...
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Jeff M. ZL1 #49 (Dale, Waukesha WI) Super Stock restoration by SCW; 9561AA (Walters, Hebron OH) Super Stock motor by the Grump
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#30
07-29-2005, 04:56 PM
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Re: Muncie Speedo Gear Question
Here is the info on my 69 L78 M-21, 4.10 posi. The tag on the sidecover is 3950316 and the adaptor is 6476736 with a ratio of 1:.777 and has a blue driven gear with 20 teeth. I also have a 69 RS Z/28 with an M-21 and 4.10 posi and no adaptor. The tag on the sidecover is 3946798 and has a driven white gear with 25 teeth. Attached are pics of the adaptor.
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