1978 Firebird Engines
| UPC Code | Type | Source | Displ cid | Bore & Stroke | Carb | Comp | HP/RPM Net | Torque/RPM | VIN | Engine Block code(s) | UPC | Transmission | Axle | Opt Axle | Base | Esprit | Formula | Trans Am | Notes |
| LD5 | V-6 | Buick | 231 | 3.80 x 3.40 | 2 bbl | 8.0:1 | 105@3400 | 185@2000 | A | EA, EC, EE | MM3 | 3 Speed Manual | | | S | S | n/a | n/a | Not available with 3 speed in Californa or High Altitude |
| MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | A | A | n/a | n/a |
| LG3 | V-8 | Chevrolet | 305 | 3.74 x 3.48 | 2 bbl | 8.4:1 | 145@3800 | 245@2400 | U | TH, TJ, TK, 3N | MM4 | 4 Speed Wide Ratio Manual Transmission | | | A | A | S | n/a | Not available with High Altitude Package |
| 135@3800 | 240@2000 | MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | A | A | A | n/a |
| LM1 | V-8 | Chevolet | 350 | 4.00 x 3.48 | 4 bbl | 8.2:1 | 170@3800 | 270@2400 | L | HF, HJ, HL, HR, 3T | MM4 | 4 Speed Wide Ratio Manual Transmission | | | A | A | A | n/a | Not available with 4 Speed in Californa or High Altitude |
| 160@3800 | 260@2400 | MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | A | A | A | n/a |
| L78 | V-8 | Pontiac | 400 | 4.125 x 3.75 | 4 bbl | 7.7:1 | 180@3600 | 325@1600 | Z | YA, YU | MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | | | n/a | n/a | A | S | Not available in Californa or High Altitude |
| W72 | V-8 | Pontiac | 400 | 4.125 x 3.75 | 4 bbl | 8.1:1 | 220@4000 | 320@2800 | Z | WC | M21 | 4 Speed Close Ratio Manual Transmission | | | n/a | n/a | A | A | Not available with 4 Speed in Californa or High Altitude |
| X7 | MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | n/a | n/a | A | A |
| L80 | V-8 | Oldsmobile | 403 | 4.35 x 3.39 | 4 bbl | 7.9:1 | 185@3600 | 320@2000 | K | U2, U3, VA, VB | MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350) | | | n/a | n/a | A | A | Standard on Trans Am and optional on Formula in California and High Altitude |
1978 Firebird Transmissions
| UPC Code | Type | Usage | Codes | Base | Esprit | Formula | Trans Am | Notes |
| MM3 | 3 Speed Manual Transmission | LD5 231cid V6 (Buick) | | S | S | n/a | n/a | Not availble in California or High Altitude |
| MM4 | 4 Speed Wide Ratio Manual Transmission | LG3 305 cid V8 (Chevrolet) | | n/a | n/a | S | n/a | Not available in California or High Altitude |
| LM1 350 cid V8 (Chevrolet) | n/a | n/a | A | n/a |
| M21 | 4 Speed Close Ratio Manual Transmission | W72 400 cid V8 | | n/a | n/a | A | A | |
| MX1 | 3-Speed Turbo Hydramatic Transmission (Turbo 350)* | LD5 231 cid V6 (Buick) | | A | A | n/a | n/a | |
| LG3 305 cid V8 (Chevrolet) | | A | A | A | n/a |
| LM1 350 cid V8 (Chevrolet) | | A | A | A | n/a |
| L78 400 cid V8 | | n/a | n/a | A | S |
| W72 400 cid V8 | | n/a | n/a | A | A |
| L80 403 V8 (Oldsmobile) | | n/a | n/a | A | A | California and High Altitude Only |
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.