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Message: [QUOTE="speedracer1000, post: 835956, member: 2739"] ok ive had this problem forever it seems like, every time I change a tune my trans goes ballistic to the point it scares me to change a tune. but once it learns its fine, u can drive it 50k miles like that and its perfect. I don't get it, tell me wut u think im doing wrong.... I got 190/75s and a pmax and Ive been havin some fuel pressure issues but tahts beside the point. ive been running erics tunes but I got some from matt the other day, seems like its really bad with his... when you first change the tune ill pull out and it gets to 3rd or something and itll flare up real bad and slam in then itll like go into neutral and sometimes hang there till u let off then it finally upshifts. so in the past I found that if u drive it a few miles then stop and just run it wide open itll go thru all the gears fine and u do that a couple times and then itll finally learn. then no more trouble after that it. well tonight I loaded up matts srl reduced fuel. and of course I go through the whole deal with it actin the way it does for a few miles. I tried runnin it wot and it was a no go. it just hit the rev limiter for a sec. then after I let off it finally went in. tried that a couple times it just wont learn at wot. all kinds of slammin and banging and everything else. at one point it locked the back tires up at like 10 mph when I was slowin down, wen I got to a stop the converter musta still been locked up cuz it almost stalled the engine then it disengaged. but if I drive it normally it shifts semi decent, with very little flare. as of right now if I just drive it normal it acts like nothings wrong. even tho I don't care one bit for matts trans tuning. never did but I thought I would give his a try.. so I guess what im asking is, is there something im doin wrong to help the truck learn or wut else could be wrong? I feel that its not a solenoid issue because once it learns u have no trouble.i could prob take it for a ride right now and run it flat out and it might shift perfect but its got me scared to try it. [/QUOTE]