- Apr 26, 2004
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Hey guys. I have a 4.10 rear and an automatic transmission. My car seems to shift more jerky since the 4.10 install even though I have it set to 4.09 with my Diablosport Predator tuner.
I have made sure my shift settings are setup for the smoothest possible shift, such as setting all partial-throttle shift PSI to Stock, leaving the Torque Modulation to stock, and so forth. The Predator at this point does not allow for partial-throttle shift point adjustment, which I think could help.
What I'm wondering is do any of you other auto tranny/4.10 owners have shift issues? The issues I have specifically are:
1: Car hangs on to the gear it's in for too long (example: When in Overdrive, if I let off the gas, the car won't start coasting until about 5 seconds after letting off. It just won't release the gear).
2: Shift from gear 3 to 4 seems rough, especially when driving slower. It is like the car shifts from 3 to Neutral then to 4, but does this quickly. That may be a bad example. In other words, it shifts hard from 3 to 4, even though I'm driving slowly.
3: The car jerks when in overdrive at lower rpms when I let off the gas quickly. Instead of the transmission smoothing out/releasing and letting the car roll, the car jerks like I'm tapping the break almost. THEN it smooths out. Sort of like if my shifter is in 2nd and it's forced to "hang on" to 2nd when letting off at high RPMs, and it makes the car nose dive a little.
ALL the issues occur when driving the car around normally/partial-throttle. When horsing around or giving it a lot of gas, it shifts great all the time.
I could drive it harder all the time, that would fix my issue. I feel like this is unnatural though. Is the computer in the car just hard-set to 3.27 gears for the partial throttle shift points, and that is what is causing my issues? The transmission just is not smooth with the 4.10s, and when I had the 3.27 gears in it never had this problem.
I am probably going to go back to the 3.27 gears if I can't find a good solution for this problem. I'd love to leave the 4.10s in though, they are a great power gear.
Any credible info on this would be helpful. Thanks!
I have made sure my shift settings are setup for the smoothest possible shift, such as setting all partial-throttle shift PSI to Stock, leaving the Torque Modulation to stock, and so forth. The Predator at this point does not allow for partial-throttle shift point adjustment, which I think could help.
What I'm wondering is do any of you other auto tranny/4.10 owners have shift issues? The issues I have specifically are:
1: Car hangs on to the gear it's in for too long (example: When in Overdrive, if I let off the gas, the car won't start coasting until about 5 seconds after letting off. It just won't release the gear).
2: Shift from gear 3 to 4 seems rough, especially when driving slower. It is like the car shifts from 3 to Neutral then to 4, but does this quickly. That may be a bad example. In other words, it shifts hard from 3 to 4, even though I'm driving slowly.
3: The car jerks when in overdrive at lower rpms when I let off the gas quickly. Instead of the transmission smoothing out/releasing and letting the car roll, the car jerks like I'm tapping the break almost. THEN it smooths out. Sort of like if my shifter is in 2nd and it's forced to "hang on" to 2nd when letting off at high RPMs, and it makes the car nose dive a little.
ALL the issues occur when driving the car around normally/partial-throttle. When horsing around or giving it a lot of gas, it shifts great all the time.
I could drive it harder all the time, that would fix my issue. I feel like this is unnatural though. Is the computer in the car just hard-set to 3.27 gears for the partial throttle shift points, and that is what is causing my issues? The transmission just is not smooth with the 4.10s, and when I had the 3.27 gears in it never had this problem.
I am probably going to go back to the 3.27 gears if I can't find a good solution for this problem. I'd love to leave the 4.10s in though, they are a great power gear.
Any credible info on this would be helpful. Thanks!