71 442,A/C,MT,W-37,TN engine code. Is "OD" the correct decal?

 

I beleive it's OK, I think OD is for non AC cars. Better wait for an expert

 

http://www.drdecal.com/

 

I know 8 year old thread.
Curious was there ever a definitive answer to the emission decal for 71 442, A/C, MT?
I agree with above that the two choices are either OD or OK.

 

Al, this virus and sheltering in place stuff is taking a toll on all of us, You do know it's 2020 now, not 2018?

 

https://www.supercarsunlimited.com/items.aspx?nid=38

71 Emission Sticker
1971 350 4bbl AT or MT (OB)
01-042 6.95

71 Emission Sticker
1971 455 2bbl AT Cutlass SX (OF)
01-048 6.95

71 Emission Sticker
1971 4-4-2 AT (w/o AC), all MT (OD)
01-044 6.95

71 Emission Sticker
1971 4-4-2 AT with air cond. (OK)
01-050 6.95

71 Emission Sticker
1971 4-4-2 W-30 AT (w/o AC), all MT (OE)
01-046 6.95

71 Emission Sticker
1971 4-4-2 W-30 AT with air cond. (OL)
01-052 6.95

https://www.thepartsplaceinc.com/dat...%20Decoder.pdf

 

Based on the text "all MT" I could see the OD code being correct.
I'd really like someone with some additional Oldsmobile documentation to chime in on which one is correct.

 

I'm going to concur with the OD sticker for all non-W MT 442s in 1971. I just spent some time scanning through the 1971 Engine Assembly Manual. There are two engine codes for the 71 MT cars, TU and TA. There is no differentiation between A/C and non-A/C engines, and the only difference between TU and TA engines is the clutch disk - TU engines were configured with a clutch for 3 spd manual transmissions and TA engines got a clutch disk for the four speed. Spark plugs, timing, carb, etc are all the same, so the same emissions decal.