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Jeep Transmissions: TF 999

999 front 999 back 999 side

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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.

Transmission 1st 2nd 3rd 4th 5th Rev
TF 999 2.74 1.55 1.00 2.20

Last modified Wednesday, 01-Dec-2010 09:17:23 MST


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Matt (2/28/2013)
Can anyone explain the difference between the 999 Jeep auto tranny and the 998 AMC Eagle tranny which is ALSO 23 spine / 6 bolt output. My guess is calibration and shift points since Eagles were usually 2.35 axle. (I already know the differences compared to 904)

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