| 1 | A | B | C | D | E | F | G |
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| 2 | Gillig Transit Coach School Bus - Powertrain |  |  |  |  |  |  |
| 3 | Engine | Configuration | Production | Gillig model code | Engine fitment | Notes | Transmission |
| 4 | Diesel engines | Diesel engines | Diesel engines | Diesel engines | Diesel engines | Diesel engines | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 5 | Caterpillar 1160 Caterpillar 3208 | 636 cu in (10.4 L) V8 636 cu in (10.4 L) turbocharged V8 | 1970-1982 | 636D | Rear | - | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 6 | Cummins C-160 C-170 C-180 C-190 | 464 cu in (7.6 L) inline-6 | 1959-1974 (C160) 1959-1976 (C170/C180/C190) | C-160D C-170D C-180D C-190D | Rear | Distinguished by roof-mounted external air intake (designed by Kenworth) | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 7 | Cummins NHH | 743 cu in (12.2 L) inline-6 743 cu in (12.2 L) turbocharged inline-6 855 cu in (14.0 L) inline-6 855 cu in (14.0 L) turbocharged inline-6 | 1959-1973 (743) 1974-1982 (855) | 743D 743DT 855D 855DT | Midship | DT=Mid-engine tandem | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 8 | Cummins VTF555 | 555 cu in (9.1 L) V8 | 1975-1982 | VTF555D VTF555DT (tandem) | Rear | VTF555DT is the only rear-engine tandem-axle school bus ever built | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 9 | Detroit Diesel 6V53 | 318 cu in (5.2 L) V6 | 1971-1977 | 318D | Rear | - | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 10 | Detroit Diesel 6N71 | 426 cu in (7.0 L) inline-6 426 cu in (7.0 L) turbocharged inline-6 | 1976-1982 | 426D 426DT | Midship | 426DT=Mid-engine tandem | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 11 | Gasoline engines | Gasoline engines | Gasoline engines | Gasoline engines | Gasoline engines | Gasoline engines | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 12 | Ford Super Duty V8 | 534 cu in (8.8 L) OHV V8 | 1958-1974 | 534D | Rear | Final gasoline engine used in Transit Coach | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 13 | Hall-Scott 590 | 590 cu in (9.7 L) SOHC inline-6 | 1954-1959 | 590D | Rear | - | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |
| 14 | International Harvester RD-501 ("Red Diamond") | 501 cu in (8.2 L) OHV inline-6 | c.1950-1959 | 501 | Rear | - | Spicer 6252 5-speed manual Fuller T905 5-speed manual Fuller RT610 10-speed manual Allison MT643 4-speed automatic Allison MT644 4-speed automatic Allison HT740 4-speed automatic |

Question: What powers the Gillig Transit Coach School Bus models?
Answer: Gillig Transit Coach School Bus models 555 and 426 are powered by the Cummins VTF555 V8 and Detroit Diesel 6N71 inline-6, respectively.