same thing happened to me. changed my plugs and wires about 2 weeks ago. all of a sudden the truck skips and jerks when in OD. i think my gaps might be too wide.

 

whenever you start modding a truck they say that a slightly smaller gap is good. we go to the ngk plugs since when we use them they work well. i am on my second set and have run them countless times on the juice. i have melted autolites. bosch fouled out. i have burn the tips off of a set of platinums. i suppose you can go back to the platinums. but to save money and have a good set of plugs the ngk is the most popular.

 

Well guys went today and bought some more tr55's and left them gapped at whatever they came gapped. Put them in and it fired right up and idled fine.. Took it for a test drive it everything is good.. Thanks for all the help as always guys!!