Here is a site with all the spec's as well as the factory service manual, for the 2003. The 2004 truck is the same as the 2003.
http://fsm.afraid.org/


John Luttrell
2001 4x4 short cab, 3 inch lift with 33 inch mudders and Powertrax no-slip in the rear


1991 Jeep YJ, 4 inch suspension lift on 33" BFG's