Poll

What 4 speed transmission and rear axle ratio came from the factory in your 1969 Z/28?

M20 with std 3.73 rear axle ratio
8 (23.5%)
M21 with std 3.73 rear axle ratio
10 (29.4%)
M22 with std 3.73 rear axle ratio
1 (2.9%)
M20 with economy 3.55 rear axle ratio
0 (0%)
M21 with economy 3.55 rear axle ratio
1 (2.9%)
M22 with economy 3.55 rear axle ratio
0 (0%)
M20 with performance 4.10 rear axle ratio
2 (5.9%)
M21 with performance 4.10 rear axle ratio
11 (32.4%)
M22 with performance 4.10 rear axle ratio
1 (2.9%)
M20 with special rear axle ratio
0 (0%)
M21 with special rear axle ratio
0 (0%)
M22 with special rear axle ratio
0 (0%)

Total Members Voted: 34

Author Topic: 1969 Camaro Z/28 Original Transmission and Axle ratio combination  (Read 1657 times)

68 Ragtop

  • Member
  • ***
  • Posts: 111
    • View Profile
If you have or had an original 1969 Z/28 and know the transmission type and axle ratio please answer.

The 3.73:1 rear axle was the ratio you got unless something else was checked on the order form.
The other axle options were economy, performance, and special where you specified in the ratio.

DavidS

  • Member
  • ***
  • Posts: 167
  • z28.net
    • View Profile
    • www.z28.net
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #1 on: November 28, 2013, 04:01:35 AM »
BE or BV or QY is 4.10 ratio.

I voted "4.11 rear" since it's the closest one, and I have a BV code with a M21.



ZLP955

  • Hero Member
  • *****
  • Posts: 743
    • View Profile
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #2 on: November 28, 2013, 07:44:46 AM »
Not interested in open or posi rear?
Tim - 04A VN '69 z/28 69-69 715 ex-E/MP

68 Ragtop

  • Member
  • ***
  • Posts: 111
    • View Profile
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #3 on: November 28, 2013, 08:39:01 PM »
BE or BV or QY is 4.10 ratio.

I voted "4.11 rear" since it's the closest one, and I have a BV code with a M21.


Not quite sure what you mean. 4.11 is not an option from the factory or in the poll.

68 Ragtop

  • Member
  • ***
  • Posts: 111
    • View Profile
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #4 on: November 28, 2013, 08:50:52 PM »
Not interested in open or posi rear?
Not for this purpose. I suspect the percentage of posi units is high due to Chevy recommending it with the 3.73 and requiring it with the 4.10 and above.

DavidS

  • Member
  • ***
  • Posts: 167
  • z28.net
    • View Profile
    • www.z28.net

ZLP955

  • Hero Member
  • *****
  • Posts: 743
    • View Profile
Tim - 04A VN '69 z/28 69-69 715 ex-E/MP

KurtS

  • CRG Coordinator
  • *****
  • Posts: 3568
    • View Profile
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #7 on: November 29, 2013, 03:31:32 PM »
I fixed it. Sorry for the confusion.
Kurt S
CRG

68 Ragtop

  • Member
  • ***
  • Posts: 111
    • View Profile
Re: 1969 Camaro Z/28 Original Transmission and Axle ratio combination
« Reply #8 on: November 29, 2013, 07:09:31 PM »
Thanks Kurt. I forget sometimes there is a small difference between 10 and 12 bolt ratios like 3.08/3.07 and 4.11/4.10.

BTW if you have a special ratio feel free to post it. The poll would get way to complicated if I tried to include all possibilities.