Editing Turbo-Hydramatic (section)

===THM250===
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{{originalresearch-section|date=February 2024}}
The '''THM250''' is a derivative of the THM350 and was introduced for 1974 in Chevrolets as a [[Powerglide]] replacement. Internally, the THM250 is a THM350 without the intermediate clutch pack and with a band adjuster similar to the Powerglide. The THM250 was usually coupled to smaller displacement engines - the largest a third generation Chevrolet inline six found in the Nova and Camaro (1974 and 75 model year only). During the 1976 model year the THM250 was phased out of production, replaced with the lighter duty THM200. It was later reintroduced in 1979 as the THM250-C in the wake of the failure-prone THM200/200C - the later 250C was further lightened with the use of a sun gear shell used with the THM350 but with 3 holes to reduce rotating mass and the low/reverse piston with 8 cutouts.

{| class=wikitable
|+Gear ratios: THM350, 250, 250C
!Gear
!Ratio
|-
|1||2.52:1
|-
|2||1.52:1
|-
|3||1.00:1
|-
|R||2.07:1
|}