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Old 02-12-2010, 01:22 AM   #1
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700R4/4L60 Line pressure test?

Are these transmissions line pressure directly related to valve body shift kit and correct adjustment of TV cable?
If so, how do you check your pressure at different rpms?
Also, what pressure are you shooting for at idle and WOT?
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Old 02-12-2010, 11:24 AM   #2
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Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"

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Re: 700R4/4L60 Line pressure test?

throttle valve cable yes

has to be set correctly

only one setting on these

pull the housing all the way rear ward

then open the throttle all the way WOT to set it,

i have no idea what is stock line pressure on typical 700r4 pumps.

someone here will know that
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Last edited by Randy82WS7; 02-12-2010 at 02:12 PM.
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Old 02-15-2010, 04:17 AM   #3
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Re: 700R4/4L60 Line pressure test?

With the .500" main boost valve and a .296" or .300" intermediate/reverse boost valve. You should be at a minimum of 210 and a maximum of 240 psi. at WOT in the 1-2-3 positions. Reverse can be more. This can vary with other modifications done to the valve body, and how stiff the main boost valve spring is. Anything under 210 psi. at WOT will not hold any kind of horsepower for long, even with the right 3-4 clutches and 2-4 band. I find 230-240 psi. with everthing else done right to be a good pressure for the 700R4/4L60E unit.
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Old 02-15-2010, 12:54 PM   #4
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Re: 700R4/4L60 Line pressure test?

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Originally Posted by Pro Built Automatics View Post
With the .500" main boost valve and a .296" or .300" intermediate/reverse boost valve. You should be at a minimum of 210 and a maximum of 240 psi. at WOT in the 1-2-3 positions. Reverse can be more. This can vary with other modifications done to the valve body, and how stiff the main boost valve spring is. Anything under 210 psi. at WOT will not hold any kind of horsepower for long, even with the right 3-4 clutches and 2-4 band. I find 230-240 psi. with everthing else done right to be a good pressure for the 700R4/4L60E unit.
Well, I recieved your kit for my transmission and the builder has it now. Any suggestions on how to check pressure with a 93 and TV cable set up? With a TV cable you dont want to adjust it, you just set it where it is supposed to be and move one.
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Old 02-15-2010, 01:10 PM   #5
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Re: 700R4/4L60 Line pressure test?

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Originally Posted by Randy82WS7 View Post
throttle valve cable yes

has to be set correctly

only one setting on these

pull the housing all the way rear ward

then open the throttle all the way WOT to set it,

i have no idea what is stock line pressure on typical 700r4 pumps.

someone here will know that
93 Corvette is a little different. I will use the FSM here, and a 1/8" drill bit and inch/pounds torque wrench
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Old 02-20-2010, 02:46 PM   #6
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Re: 700R4/4L60 Line pressure test?

The TV cable should be tight at WOT. "IF" you find that it shifts to late at part throttle, then you can "back off" a 1/16" at the most to correct this. If you are installing the kit and have any questions, call me at 909 795-1876 anytime in the afternoon or evening during the week or anytime on the weekends. If you miss me leave a message and I will return the call. Dana
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Old 02-20-2010, 02:46 PM
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