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Message: [QUOTE="stacked6.7, post: 1178247, member: 9938"] Well I knew this would happen eventually. But I would like some help to pinpoint the problem if we can do so. 2011 f250, modded CP4, fass lift pump, mini maxx, s371fmw, tunes from demonic diesel. I've had this setup for about 6 months and before that was the same but with a 366 for 6 months. This truck has had a very very very hard life. Brake stands, boosted launches, dyno's, truck pulls. You name it I've probably done it. And all the while the trans has been very good to me. Slipped a few times, popped out of fear once or twice, but nothing major... Today on my way home I noticed it was acting different. A couple hard shift, flared 4th, and then went into what I'm guessing is limp mode of some sort. Drives fine in 1-3, has all the power it normally has, but 4th it will slip and then jump to 6th. I also don't have manual mode. Any ideas? [/QUOTE]

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