Newbie ??
04-10-2011, 08:12 AM
#1
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
04-10-2011, 12:14 PM
#4
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Join Date: Jan 2010
Location: South Dakota
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I had an '84 TA. There was a cheap kit that would allow more throttle or WOT in 4th. I got mine from one of the popular racing parts catalogs years ago. I don't know if it's still available.