| Transmission Dimensions
There are three ways to determine if that three- or four-speed automatic transmission lying on the floor of your garage will fit in your latest project: you can eyeball it, measure it, or look up the critical dimensions in this handy chart. Guess which one we recommend. Our chart gives you the critical dimensionsoverall length and bellhousing-to-transmission lengthyou need to know to determine if that GM, Ford, or Chrysler slushbox will fit in your chassis. As a special added bonus, we also have the gear ratios for said transmissions to help you better determine the overall gearing for your vehicle. Once you’ve determined that the transmission will fit, take a minute to read our The Right Stall story in the Tech section to learn how to choose the right torque converter for your vehicle combination. |
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| GM Transmissions | ||||||
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| Type | 1st Gear |
2nd Gear |
3rd Gear |
4th Gear |
Overall Length |
Bellhousing-to- Transmission Length |
| TH-350 | 2.52 | 1.52 | 1.00 | -- | 27 5/8"* | 20 3/8" |
| TH-400 | 2.48 | 1.48 | 1.00 | -- | 28 1/4"+ | 26 3/4" |
| TH-200-4R | 2.74 | 1.57 | 1.00 | 0.67 | 27 3/4" | 26 7/8" |
| TH-700-R4/4L60 | 3.06 | 1.62 | 1.00 | 0.70 | 23 3/8"# | 22 3/8"# |
| 4L60E | 3.06 | 1.62 | 1.00 | 0.70 | 30 3/4" | 22 3/8" |
| 4L80E | 2.48 | 1.48 | 1.00 | 0.75 | 31 1/2" | 30 3/8" |
| *With 6" (short) tailhousing + With short tailhousing # Except Corvette |
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| Ford Transmissions | ||||||
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| Type | 1st Gear |
2nd Gear |
3rd Gear |
4th Gear |
Overall Length |
Bellhousing-to- Transmission Length |
| C4 | 2.46 | 1.46 | 1.00 | -- | 30 1/2" | 20 1/4" |
| C6 | 2.46 | 1.46 | 1.00 | -- | 33 1/2" | 22 1/2" |
| AOD | 2.40 | 1.46 | 1.00 | 0.67 | 30 3/4" | 22 1/4" |
| E40D | 2.71 | 1.53 | 1.00 | 0.70 | 37 1/2" | 29 3/8" |
| Chrysler Transmissions | ||||||
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| Type | 1st Gear |
2nd Gear |
3rd Gear |
4th Gear |
Overall Length |
Bellhousing-to- Transmission Length |
| A904 | 2.74 | 1.54 | 1.00 | -- | 30 1/2" | 22 2/3" |
| A727 | 2.45 | 1.45 | 1.00 | -- | 34 3/8" | 22 2/3" |
| A518/A618 | 2.45 | 1.45 | 1.00 | 0.69 | 36 7/8" | 24" |
| A500 | 2.74 | 1.54 | 1.00 | 0.69 | 34 1/2" | 24 1/2" |