1974 Z28, Which 4-speed?

[mgd1790]

Hi, one of my Z28s has a VIN ending with 200939. I do not have the original 4-speed. Someone mentioned they switched from Muncies to another. What tranny was in there if it wasn't a Muncie and what's the cutoff (+/-) for the VINs?

Thanks for any insight.

 

[COPO]

Camaro Transmission Information & Restoration

Camaro Transmission Restoration Information.

www.nastyz28.com

 

[mgd1790]

Thanks COPO. Is there a source/location on our site with the months of certain VINS?

 

[TomatoStripeZ28]

Thanks COPO. Is there a source/location on our site with the months of certain VINS?

Here you go Mike

1974 Camaro data - Statistics, facts, decoding, figures & reference information

1974 Camaro Statistics, facts, decoding, figures & reference information for the 1974 Camaro.

www.nastyz28.com

Jeff

 

[Z28PILOT]

m21 muncie four spd was replaced by M21 Borg Warner Super T-10 four speed . The ratios were also different. ( Warner ) 1st gear became 2:43: 1. As opposed to M21 Muncie 2:20 first . The exact date to serial number and corresponding months for the second half of the 74 model year , I have not seen published I have an original copy of GM technical service bulletin. 2-74 ….where they announced the changes to four speeds and HEI additions . The actual implementation pin pointed down to the cars serial number may yet be a mystery. There have been many discussions. Some were in the old 74 owners thread .

 

[mgd1790]

Appreciate the reply. On our site is shows this.

1974 Ending VIN by Month

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Norwood:

103546

111226

122449

132731

140883

155295

169040

183937

197997

Van Nuys:

None built

 

[unrestored72Z]

When was your car built?

 

[mgd1790]

05a, is that January 5th?

 

[mgd1790]

I think our site said in January they made the switch to from Muncie so technically I could have had either one, maybe.

 

[mgd1790]