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post #1 of 6 (permalink) Old 11-23-2009, 12:24 AM Thread Starter
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VB line pressure?

Right now when i hook it up to a pressure tester i can get about 10psi. The shifts are crisp and clean.

After a couple of hours the shifts start to get sloppy and slide into gear. At this point i get around 6psi.

I am losing pressure somewhere and dont know why. I have a new valve body, tugger shift kit, new clutch packs, brand new build. Hav'nt gotten to drive it much yet. Any suggestion's or trouble shooting to cure my problems.

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post #2 of 6 (permalink) Old 11-23-2009, 12:55 AM Thread Starter
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Re: VB line pressure?

Anybody????

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post #3 of 6 (permalink) Old 11-23-2009, 12:59 AM
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Re: VB line pressure?

10PSI? That can't be right, where are you testing it? in the pressure port on the side?

10psi isn't gonna hold much, pressure specs are in the transgo manual if you have it from the tugger install.

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post #4 of 6 (permalink) Old 11-23-2009, 01:03 AM Thread Starter
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Re: VB line pressure?

Quote:
Originally Posted by highfive View Post
10PSI? That can't be right, where are you testing it? in the pressure port on the side?

10psi isn't gonna hold much, pressure specs are in the transgo manual if you have it from the tugger install.
the builder told me it was getting 10psi when he hooked it up. I dont personally check it nor do i know where it should be. I just took it forgranted he knew what should be right. I took it back and he is going to do some adjusting on it. And those reading are coming without my chip installed. He is supposed to call transgo in the morning and deliver it back to me.

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post #5 of 6 (permalink) Old 11-23-2009, 12:51 PM
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Re: VB line pressure?

There are two places that one could measure pressure. The test port on the side of the trans reads line pressure. That should be between 65 PSI and 330 PSI depending on operating conditions.

One could also read pressure in the cooler lines, though I don't know what that would show. Those pressures could be anywhere from 0 to about 40 PSI.
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post #6 of 6 (permalink) Old 11-23-2009, 07:52 PM
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Re: VB line pressure?

Specs I used:
Gear Range-------- at Idle Hot-----------at Stall Hot
-----------------------------------------------------
Park&Neutral--------55-70 PSI--------------N/A-------
-----------------------------------------------------
Reverse-------------75-130 PSI-----------240-265 PSI
-----------------------------------------------------
Drive---------------55-70 PSI------------156-174 PSI
-----------------------------------------------------
2nd-----------------55-70 PSI------------156-174 PSI
-----------------------------------------------------
1st----------------75-99 PSI------------157-186 PSI

96 F250 CC SB 4x4
DIY or Die Tryin-Fuel, Trans, Lifted and Stroked
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