Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 03-01-2017, 04:06 PM
302moz 302moz is offline
Yenko Contributing Member
 
Join Date: Sep 2006
Location: Michigan
Posts: 1,289
Thanks: 13
Thanked 52 Times in 38 Posts
Default 1969 camaro m21 trans speedo gears Copo

Putting together a M-21 transmission for a 69 Copo Camaro. Not sure on the drive gear and driven gear for the speedo. It has factory XT 14inch wheels and a 4.10 ratio rear. Not sure if it uses a speed reducer?what would the teeth count be on those two gears?thanks
Reply With Quote
Click here to view all the pictures posted in this thread...
  #2  
Old 03-01-2017, 05:12 PM
69L78's Avatar
69L78 69L78 is offline
Yenko Contributing Member
 
Join Date: Dec 2003
Location: PA
Posts: 2,383
Thanks: 26
Thanked 518 Times in 184 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

you need the reducer, I think it is the same as a Yenko Deuce, Marlin can confirm this
Reply With Quote
  #3  
Old 03-01-2017, 05:17 PM
scuncio's Avatar
scuncio scuncio is offline
Yenko Contributing Member
 
Join Date: Oct 2000
Location: Michigan
Posts: 14,119
Thanks: 2,902
Thanked 7,320 Times in 3,318 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

If you need one, I have a good used one available.
Reply With Quote
  #4  
Old 03-01-2017, 05:47 PM
Salvatore Salvatore is offline
Yenko Contributing Member
 
Join Date: Nov 2002
Location: Pennsylvania
Posts: 9,908
Thanks: 3
Thanked 229 Times in 193 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

Johnnyyyyy, you will never drive it that far or that fast for the speedo to even register!
Reply With Quote
  #5  
Old 03-01-2017, 07:20 PM
m22mike's Avatar
m22mike m22mike is offline
Senior Member
 
Join Date: Jan 2006
Location: West of CAK
Posts: 5,001
Thanks: 766
Thanked 840 Times in 406 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

You do not need a reducer, you need a orange 25 tooth driven gear. That is what I have in my Camaro with stock 14's and 4.10, and the speedo is spot on at 60. Not sure what my drive gear is ?
And Sammy is right, you might not ever need the speedo... [img]<<GRAEMLIN_URL>>/naughty.gif[/img]

Mike
Reply With Quote
  #6  
Old 03-01-2017, 07:26 PM
Salvatore Salvatore is offline
Yenko Contributing Member
 
Join Date: Nov 2002
Location: Pennsylvania
Posts: 9,908
Thanks: 3
Thanked 229 Times in 193 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

25 tooth is what I run with a 4.56 rear (original 4.10). Never had a reducer on my camaro or nova or even my original 69 SS nova from new. John, you better be looking straight ahead when you let that clutch out and put that peddle down. Easy 11 second car on the street with your motor prowness, maybe faster. Go Johnny Go
Reply With Quote
  #7  
Old 03-02-2017, 01:09 AM
69L78's Avatar
69L78 69L78 is offline
Yenko Contributing Member
 
Join Date: Dec 2003
Location: PA
Posts: 2,383
Thanks: 26
Thanked 518 Times in 184 Posts
Default Re: 1969 camaro m21 trans speedo gears Copo

My former 69 L78 survivor with 12k miles had the reducer same as the Yenko Deuce, you know John likes to make things correct.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 03:39 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.

O Garage vBulletin Plugins by Drive Thru Online, Inc.