my jsd-3m. have not had the first service yet. was thinking of letting the dealer do the first just for warranty reasons then I'll do em' from then on since I'll have my service manual in a week or so. may wait to put the jsd mod on too just in case the dealer checks the ecu. from what I have read it seems the most important thing on the jsd mod is to get the ground right, I will prolly go to the neg side of the battery for a good ground. I may actually get a day off from work this week and that's when I will do my turn sigs mod and get rid of that hideous mudflap in the rear....mmmm need exhaust system and power commander and.......