Probably not a torque converter issue at all. Sounds like a transmission shifting strategy issue. Bill can change this fairly easily, you just need to get into contact with him. When the torque converter unlocks it should only change your r.p.m by about 300 r.p.m, whereas a downshift will change by about a 1000 r.p.m. When the torque converter locks it no longer has a fluid coupling between engine and transmission, but now has a more mechanical connection, kind of like a clutch on a 5 speed. Well I hope this helps.
Ty
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2001 Dodge Cummins 
Tuning is addicting. Lol. 
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Thu, February 5th, 2009, 01:06 PM
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