I am very interested iin this too. I have ben having this wonder thing happen to me too. I cold not get up to 65 without a crossing of lans....very scary. Then I changed the gear box out for a used one. This fixed the problem to a degree. It still wanders but not near what it used to. I just read to day in Diesel Power magazine on a dodge fix for the wander.
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99.5PSD, F250, 4x4, wht. CC, SB, Line-X, 200K+ , 6spd,LUK Ceramic Clutch, Warn Premium hubs, DP Tuner F5 stock/high idle/40T/60T/80E, DIY TYMAR, No EBPV, 08 Diff Cover, 4"MBRP S/S, Banks wheel*traded for stock wheel*, ATS Housing, HXLine, Zoodad Mod, CCV Mod, AIH removed, Shimmed fuel, Isspro Boost Guage & Pyro Guage, 2" Level Kit, Firestone Air Support Springs, BFG AT k/o, CB Galaxy DX949, DUAL Antennas, Lead Foot came stock
1998-F150 4x4, LB, K&N, No Kitty, 24LB inj, CB...Wifes ride.
94 Mustang GT, Red, Black Saleen rims, T-5, intake, exhaust, cam, 24LB squirts, tuned, last of the 302...
