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1999 to 2003 7.3L Power Stroke Diesel
7.3L Power Stroke Diesel equipped Super Duty and Excursion.

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  #1  
Old Thu, January 6th, 2011, 08:32 AM
rammertide07 rammertide07 is offline
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Quote:
Originally Posted by tpearia View Post
Invoice number 3833.

Only reason I had the 140 on it was just to check it out. Not something Ill use on a regular basis. Its a hauler not a hotrod. lol

Seems to do it with any tune really. Been driving with the fuel sipper tune, and it just seems whenever it shifts, not sure how to describe it, maybe locks the converter up immediatly? It goes into the next gear ok, for a second, and then the rpms drop way down, in somewhat of a jerk, almost bogging the truck. Does it under normal and moderate throttle.

Sounds like the way your programming for your shift points were done.

According to my OHD, 140 is my fuel sipper. 80DD doesn't seem to do anything over stock except adjust shift points
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Old Thu, January 6th, 2011, 09:58 AM
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cleatus12r cleatus12r is offline
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You are using the most popular hex code we have for the FU, VRAA6S3 (PMT1). It is the same exact version of the program that every other PMT1 FU customer has access to. If there is something strange going on with the shifts, it would occur in every truck that is using the VRAA6S3 tunes with their FU. Is your transmission modified in any way? Sometimes shift kits will cause what you describe.
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Old Thu, January 6th, 2011, 09:56 PM
tpearia tpearia is offline
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Its a PMT2. No tranny mods that im aware of, doesnt feel like a shift kit.

It does have (slightly) different tire size on it from stock, which was given on the order form, if that makes any difference.

If I just knew that maybe the converter locking up sooner or something is causing what im feeling, thats fine. I have no issues with it as long as i know thats what its supposed to feel like.

Thanks!
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Old Thu, January 6th, 2011, 10:10 PM
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cleatus12r cleatus12r is offline
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Your computer code may be PMT2, but the tuning on the chip is PMT1.
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Old Fri, January 7th, 2011, 04:58 PM
tpearia tpearia is offline
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Oh, ok, my apologies. Didnt know if that made a difference or not.

Thanks for your input!
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Old Sat, January 8th, 2011, 12:18 AM
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I suspect you're feeling the 2-3 shift and then an immediate torque converter clutch apply at certain accelerator pedal positions (happens when the 2-3 shift happens just above 35 MPH).
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