Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Up shift point 700r4

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Old 09-18-2021, 08:00 PM
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Car: 87 sport t top
Engine: 305
Transmission: 700r4
Axle/Gears: 3.23
Up shift point 700r4

I know I can go get a shift kit and whatnot. I'm trying to learn some old-school tricks. I hear tales of people drilling the weights or grinding them to up the wot shift rpm in drive. Anyone done this? Anyone able to explain the process? I have a corvette servo and a new TV cable. I need more rpm in drive at WOT.

The reason I don't want to go buy a kit is I want the old-school tricks. Auto Trans are voodoo black magic Bluetooth shifting pieces of metal that I don't understand. I'm trying to learn how people tuned these things before you could just buy a part.
Old 09-18-2021, 10:21 PM
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Car: 91camaro rs,2014 silverado 5.3L
Engine: 5.7Lcarb,5.3L
Transmission: 700-r4, 6L80
Axle/Gears: strange 3.73's
Re: Up shift point 700r4

for the weights.... the lighter the weights are, the later the upshift. it is all about centrifugal forces. so take a little weight off then test, repeat until happy.
Old 09-18-2021, 11:46 PM
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Up shift point 700r4

Um... yeah.

You are going to drive yourself nuts with this unless you have a Scale that measures in increments of 1mg, and a lot of patients.
Just do yourself a huge favor, and let people who performed all the needed calculations, provide you with a solution.




Purchase one of these: Superior Transmission Parts #K018.
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Old 09-19-2021, 05:13 PM
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Up shift point 700r4

You made the right move of starting with a Corvette servo. Fine tune from there.
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