The Torque Flite 999 is a medium duty Chrysler 3 speed automatic
transmissions. They have an aluminum case and a 23 spline output
shaft. The case is ??" long and ?? bolts hold in the pan.
Modern versions are still use the 23 spline output, but engine bolt
patterns have changed and the newer ones have electronic shift
control. I have conflicting information about torque converters. Some
say early models did not have a lock up torque converter and some say
they did. Newer models have a lock up torque converter.
Usage
The TF 999 was used in CJs from 1980-1986 only with the I6 and V8
engine. It was also used in 1984-1990 SJs and J pickups with the 4.2L
engine, in the YJ from 1987-1991 with the 2.5L and 4.2L engine, and in
the XJ in 1991 with the 2.5L engine. A modern version of the 999
continues to be used in Wrangler YJs and TJs to this day with the I6
engine.
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