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Drive Train

Terry in deep with Diane's YJ


The Wrangler (YJ) was produced from 1987 until 1995.

Larry Soo's most excellent Wrangler (YJ) FAQ.

Drive Train


The YJ came with the AMC 2.5L I4 engine standard and the AMC 4.2L(258) I6 optionally until '89. In 1990, the 4.0L I6 was introduced.


The AX-5 and BA 10/5 were used with the I4 and I6. The BA 10/5 was discontinued in mid-1989 and the AX-15 was used with the 4.2L I6 and 4.0L ever after. The TF 904 3 speed automatic was used with the I4 and the TF 999 was used with the I6 engines.

Transfer Case

The NP-207 was used in 1987. After 1987, the NP-231 was used.

Front Axle

A reverse cut Dana 30 was used as the front axle in the YJ.

Rear Axle

The factory only used the Dana 35c in the rear of the YJ.

Production Information

Year Serial Number Range Production
1987 xxx - xxx ppp
1988 xxx - xxx ppp
1989 xxx - xxx ppp
1990 xxx - xxx ppp
1991 xxx - xxx ppp
1992 xxx - xxx ppp
1993 xxx - xxx ppp
1994 xxx - xxx ppp
1995 xxx - xxx ppp

Serial Number Locations

Serial numbers are located on the . . .

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