GM Automatic Transmission Dimensions
| Transmission Type | Case to External Housing | Overall Length | Bellhousing to Mount |
| POWERGLIDE - SHORT | 15 1/4" | 24 1/4" | 19 1/2" |
| POWERGLIDE - LONG | 15 1/4" | 27 1/2" | 20 1/2" |
| TH-200 & TH-200C | 27 5/8" | 27 5/8" | 20 1/8" |
| TH-250 | 21 5/8" | 27 5/8" | 20 3/8" |
| TH-350 SHORT | 21 5/8" | 27 5/8" | 20 3/8" |
| TH-350 LONG | 21 5/8" | 30 5/8" | 20 3/8" |
| TH-400 SHORT | 24 3/8" | 28 1/4" | 26 3/4" |
| TH-400 LONG | 24 3/8" | 34" | 28" |
| 200R4 | 27 3/4" | 27 3/4" | 26 7/8" |
| 700R4 | 23 3/8" | 27 3/4" | 22 3/8" |
| 4L60 | 23 3/8" | 27 3/4" | 22 3/8" |
| 4L60-E | 23 3/8" | 27 3/4" | 22 3/8" |
| 4L80-E | ??? | 31 1/2" | 30 3/8" |
Courtesy: Richard Milkiewicz
GM Overdrive Transmissions
| Measurement | A | B | C | D | E |
| 200-4R | 27-11/16" | 27-11/16" | 27" | 3-3/4" | 19-1/8" |
| 700-R4 | 30-3/4" | 23-3/8" | 22-1/2" | 3-3/4" | 20" |
| Transmission | Pressure Side |
| 125/125C (3T40) | Bottom |
| 180 | Bottom |
| 200/200-4R | Top |
| 325/325-4L | Bottom |
| 350 | Bottom |
| 400/4L80e | Bottom |
| 440-T4 (4T60) | Bottom |
| 700-R4 (4L60) | Bottom |
