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05-17-2003, 01:58 AM
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Senior Member
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Join Date: Mar 2003
Location: San Antonio, TX
Posts: 5,486
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I was playing around with my tranny and tuning the other day and i wanted to see how TM affected my trans. I've never experienced it on my truck as much as other's have, because my tranny is built and i've always had it removed before dealing with it.
So, i put most of the tables back to stock and logged some data. I was running about 35deg of timing at WOT and noticed just as the trans shifted, GET THIS!!!!!!
The pcm pulled so much timing (this was on stock z28 tables) that my timing went down to -4 deg's. That is negative four degrees. I know most ppl over doing it when describing it, but my truck literally fell on it's face, the engines rpm came down a little and the trans felt like it was slipping, but it was the engine making less hp.
So, for those of you who have modded their trucks a little, this is what you have coming. It's not tranny problems, it's TM.
So, that's what TM does,
allen
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05-17-2003, 03:25 PM
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Senior Member
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Join Date: Apr 2003
Location: Wylie, TX
Posts: 525
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I guess I will have to take care of that. Thanks for the info.
__________________
RChevy.48
2001 Silverado RCSB 4.8L
Current Mods
Flowmaster Exhaust
LT1 Fans
vette cam sitting in garage
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05-17-2003, 11:50 PM
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Senior Member
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Join Date: Mar 2003
Location: San Antonio, TX
Posts: 5,486
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hey, no problem,
1500, the six speeds are also affected by TM, not as much obviously, but they are, the pcm can tell when you're abusing the car and will also pull timing, it will hurt performance also.
later,
allen
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05-18-2003, 12:38 AM
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Turbo Moderator
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Join Date: Mar 2003
Location: San Marcos Texas
Posts: 3,431
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I love the pic lol So that is why I can't find em when I'm hunting!!! 
__________________
2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
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12-04-2003, 02:45 PM
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Junior Member
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Join Date: May 2003
Posts: 11
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Quote:
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Originally posted by farmtruc@May 16 2003, 11:58 PM
I was playing around with my tranny and tuning the other day and i wanted to see how TM affected my trans. I've never experienced it on my truck as much as other's have, because my tranny is built and i've always had it removed before dealing with it.
So, i put most of the tables back to stock and logged some data. I was running about 35deg of timing at WOT and noticed just as the trans shifted, GET THIS!!!!!!
The pcm pulled so much timing (this was on stock z28 tables) that my timing went down to -4 deg's. That is negative four degrees. I know most ppl over doing it when describing it, but my truck literally fell on it's face, the engines rpm came down a little and the trans felt like it was slipping, but it was the engine making less hp.
So, for those of you who have modded their trucks a little, this is what you have coming. It's not tranny problems, it's TM.
So, that's what TM does,
allen
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What year PCM do you run?
Did you just take out the abuse mode or did you zero the tables under edit?
Also did you notice an improvement in the shift(s), I might be wrong but does't it only take it out during shifts?
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12-04-2003, 03:53 PM
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Senior Member
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Join Date: Mar 2003
Location: San Antonio, TX
Posts: 5,486
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The TM tables are active throughout the entire rpm table.
TM sux,
allen |
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Linear Mode
