Newbie ??
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TECH Senior Member
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Joined: Jun 2004
Posts: 5,639
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From: GA, USA
Newbie ?? I have a 15K mi 4L60E in my 55 Chev, with the 6.0.. Slightly modded. [Engine/trans is from an 05 H2].
I am in the process of tuning and find that 4th gear is "locked out" @ WOT. [255mph/8000+ rpm].
The trans has been inspected, the sun shell welded, and some bushings replaced w/ better pieces. It has the 5 gear planet and the Vette servo.
No shift kit.
The converter is a Trailblazer unit for some added stall speed.
Is it not a good idea to change the tune so 4th gear will apply at WOT?
More line psi?? How much?
Shorter shift times? How much? [It feels too soft on part throttle shifts].
TIA
I am in the process of tuning and find that 4th gear is "locked out" @ WOT. [255mph/8000+ rpm].
The trans has been inspected, the sun shell welded, and some bushings replaced w/ better pieces. It has the 5 gear planet and the Vette servo.
No shift kit.
The converter is a Trailblazer unit for some added stall speed.
Is it not a good idea to change the tune so 4th gear will apply at WOT?
More line psi?? How much?
Shorter shift times? How much? [It feels too soft on part throttle shifts].
TIA
