I have a 1990 FORD F-350 CUSTOM V8 5.8L 460-CID FI N H 4 Wheel Drive | S5-42 Trans (Standard 5 Speed)

Question: What's the difference between 4 x 2 and 4 x 4 models of the ZF S5–42 transmission?

Answer: The 4 wheel drive of the ZF S5-42 transmission has an open style tail housing allowing the companion of the transfer case.  The 2WD  ZF S5-42 transmission has a bolt on yoke in the rear only allowing the rear drive line to be bolted on. This  is why it is crucial to identify your correct transmission and vehicle information. If you have any trouble identifying your transmission our experts can help call 1-888-824-2012 or visit our website www.midwesttrans.com/ZF_S542_Manual%20Transmission.html.