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Thread: What tables in Tuning program
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02-01-2013, 12:55 AM #1
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What tables in Tuning program
From a standing start, I put the transmission into second because that is all we have in stock form, how do I keep first gear to second gear longer, I think it shifted at like 5200, and it bogged a little. It was spinning , Is there any way we can actually hold them in first gear with the stock shifter past 5200rpm, what tables in the tune do I need to look at changing.
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02-01-2013, 01:45 AM #2The FABRICATOR!
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If I remember correctly there is a mod you can do to the shifter to put it all the way down into 1st. They had 1st locked out because it wouldn't pass a sound test at a certain speed. Too loud or some bs
Chris
1985 Monte Carlo SS
Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
Check out the M122 MCSS build thread here!
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02-01-2013, 01:47 AM #3The FABRICATOR!
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From the 4th Gen FAQ:
Q: Why is there no selectable 1st gear for my automatic transmission?
A: On cars with automatic transmissions and the 2.73 rear (GU2) 1st gear can't be selected because in order to pass the Federal noise pollution tests, GM had to lock out selectable 1st gear. It has to do with downshifting into the lowest selectable gear at some speed as the car goes through the sound traps. With the 3.23 rear end, the required speed is high enough that the transmission won't allow a manual downshift all the way to 1st gear. But with the 2.73 gears, the car will downshift all the way to 1st when manually selected thereby increasing engine and exhaust noise. So GM had to prevent 1st gear from being selected on the 2.73 cars in order to meet the guidelines.
However, making 1st gear selectable on these cars is relatively easy. Lift off shifter cover, locate plastic (nylon) stop at the right side of the notched selector ramp, use a hacksaw or X-acto blade to remove the offending (square) stop. Then you will have first gear.Chris
1985 Monte Carlo SS
Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
Check out the M122 MCSS build thread here!
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02-01-2013, 01:19 PM #4
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Checked out my RPO sticker in the glove compartment, I thought this thing had 3.23's, cant wait to put 3.73's in it, it will be a whole other car. I will do this mod soon, Thanks
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