Who Is Running A Vacuum Modulated 4L60E
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I've been running one for about 2 months now and I love it! I had to delete 1 code, but I can't remember which one off hand. I'm at work right now, but when I get home I'll check my scanner and post it up. As far as I know none of the tables need to be changed because a resistor is soldered into one of the circuits to trick the PCM into thinking that it's still controlling line pressure. I've been told that you shouldn't throw a code, but I did, so I deleted it. No big deal. Everything's working fine!
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Originally Posted by Vince @ FLT
More than likely if you set a code it was for the epc solenoid. In the FLT vac mod unit's we don't use that resistor because it some times sets that code. We prefer to modify the transgo vac-mod kit a little bit.
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Originally Posted by 2xLS1
Vince, can you tell me what tables in the cal will no longer have any effect on how the transmission operates then? What about force motor tables, shift time tables, shift pressure, WOT shift RPM and MPH? I'm going to be installing a cam and tweaking the PCM on this car that is getting one of your transmissions installed this week. (Scott)
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Originally Posted by staringback05
so its like a shift mod?
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Vacuum mod here. No changes done to my computer. Think of it like the old HEI timing, when going WOT it will give you a higher timing advance. In this case, it just increases the Tranny fluid pressure.
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Originally Posted by spy2520
i believe there is a trans-go kit to make your trans vac-mod and if i'm not mistaken thats what most builders on here use in some form...
That's what I have, and that's what Greasy Mech in San Antonio uses.
I know he's talked to a few other builders on here and that's what they use as well. (So I can vouch for 3 shops on LS1Tech that use them, but they all modify them, a little bit.
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