1977 Firebird Engines
| RPO Code | UPC Code | Type | Source | Displ cid | Bore & Stroke | Carb | Comp | HP/RPM Net | Torque/RPM | VIN | Engine Block code(s) | Trans RPO | UPC | Transmission | Axle | Opt Axle | Base | Esprit | Formula | Trans Am | Notes |
| 37D | LD7 | V-6 | Buick | 231 | 3.80 x 3.40 | 2 bbl | 8.0:1 | 105@3200 | 185@2000 | C | SG, SU, ST | 38A/B | M15 | 3 Speed Manual | 3.08:1 | | S | S | n/a | n/a | |
| SI, SK, SM, ST | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.56:1 | 3.23:1 | A | A | n/a | n/a |
| 37W | L27 | V-8 | Pontiac | 301 | 3.74 x 3.48 | 2 bbl | 8.2:1 | 145@3800 | 245@2400 | Y | WB | 39F | M20 | 4 Speed Manual Transmission | 3.23:1 | | A | A | S | n/a | Standard in Formula until June 2, 1977 |
| YH, YK | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | A | A | A | n/a |
| 37M | LG3 | V-8 | Chevrolet | 305 | 3.74 x 3.48 | 2 bbl | 8.4:1 | 145@3800 | 245@2400 | | | 39F | M20 | 4 Speed Manual Transmission | 3.23:1 | | A | A | S | n/a | Standard in Formula after June 2, 1977 |
| 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | A | A | A | n/a |
| 37S | L76 | V-8 | Pontiac | 350 | 3.875 x 3.75 | 4 bbl | 7.6:1 | 170@4000 | 280@1800 | L | Y9 | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | | A | A | A | n/a | |
| 37E | L34 | V-8 | Oldsmobile | 350 | 4.06 x 3.39 | 4 bbl | 8.0:1 | 170@3800 | 275@2000 | R | Q8, Q9, TX, TY | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | | A | A | A | n/a | California amd High Altitude |
| L78 | V-8 | Pontiac | 400 | 4.125 x 3.75 | 4 bbl | 7.6:1 | 180@3600 | 325@1600 | Z | YG | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | 3.23:1 | n/a | n/a | A | S | |
| W72 | V-8 | Pontiac | 400 | 4.12 x 3.75 | 4 bbl | 8.0:1 | 200@3600 | 325@2400* | Z | WA | 39F | M20 | 4 Speed Manual Transmission | 3.23:1 | | n/a | n/a | A | A | |
| YG | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | 3.23:1 | n/a | n/a | A | A |
| L80 | V-8 | Oldsmobile | 403 | 4.35 x 3.39 | 4 bbl | 8.0:1 | 185@3600 | 320@2200 | K | U2, VA, VB | 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | 2.41:1 | 3.23:1 | n/a | n/a | A | A | Standard on Trans Am and optional on Formula in California amd High Altitude |
1977 Firebird Transmissions
| RPO Code | UPC Code | Type | Usage | Codes | Base | Esprit | Formula | Trans Am | Notes |
| 38A/B | M15 | 3 Speed Manual Transmission | LD7 231cid V6 | ZC | S | S | n/a | n/a | |
| 39F | M20 | 4 Speed Close Ratio Manual Transmission | L27 301 cid V8 | ST | A | A | S | n/a | |
| LG3 305 cid V8 | n/a | n/a | S | n/a |
| W72 400 cid V8 | n/a | n/a | A | A |
| 38L | M40 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | LD7 231 cid V6 | MC | A | A | n/a | n/a | |
| L27 301 cid V8 | MX | A | A | A | n/a | |
| LG3 305 cid V8 | AG | A | A | A | n/a | |
| L76 350 cid V8 (Pontiac) | MA | A | A | A | n/a | |
| L34 350 cid V8 (Oldsmobile) | MJ | A | A | A | n/a | California and High Altitude |
| L78 400 cid V8 | MG, MK | n/a | n/a | S | S | Option Code MG is with standard axle (2.41). MK is with optional axle (3.23) |
| W72 400 cid V8 | n/a | n/a | A | A | |
| L80 403 V8 (Oldsmobile) | | n/a | n/a | A | A | California and High Altitude |
Examples shown on this page consist of scanned images or reproduction artwork that can not be faithfully reproduced on a computer screen. Illustrations are for example only. Consult with your vendors offerring reproduction
parts for their historical accuracy.