Anything about Ford EEC tuning. TwEECer and Moates questions dominate, but there's some SCT and OBD-II knowledge too.

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David Claflin
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Is it detrimental to increase TV pressure on E4OD

Post by David Claflin » Wed Jan 28, 2026 12:45 pm

Converted my 91 F150 to HOGO1, I then increased TV pressure 10% on 1-2, and 2-3 shifts. It shifts much better, but I'm a little concerned this maybe too much for long term reliability. What say you?
1990 LX/A9L/302, Ported RPM heads, Ported Holley SMII, 1 3/4 longtubes, 3"exhaust, T5, 4.56
1985 LTD LX, A9L, ported TW heads, ported Holley SMII,1 3/4 longtubes, 4.10, T5trans, mach 1 brakes.
1986 coupe, VM1, former FHP car, stock shortblock, TW 11R190heads, stock cam +4, VIC Jr EFI. 4-holeTB, 1 3/4 longtubes, 3" exhaust, T5Z, 4.88
1993 LX A3M, 347, 11R205 heads, Ported Holley SMII, 1 3/4 RCI headers, 3" exhaust, 4.10s
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cgrey8
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Re: Is it detrimental to increase TV pressure on E4OD

Post by cgrey8 » Wed Feb 25, 2026 6:59 pm

I always thought firmer shifts resulted in higher reliability and longevity from ATFs. As long as it isn't so excessive that it's killing Ujoints and stressing the rearend, I wouldn't view it as a problem. But I am interested in what others say.
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89 Ranger Supercab, 331 w/GT40p heads, ported Explorer lower, Crane Powermax 2020 cam, FMS Explorer (GT40p) headers, aftermarket T5 'Z-Spec', GUFB, Moates QuarterHorse tuned using BE&EA

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