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

700R4 Pressure Port

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Old 10-19-2010, 01:46 PM
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Car: 1985 Z28
Engine: 334 Stroker Superram 222/230
Transmission: Full Manual 700R4 / 3k Street Edge
Axle/Gears: 3.90 Eaton, Moser, Richmond & More
700R4 Pressure Port

I am having some strange issues with my 700R4, and wanted to hook up a pressure gauge so I can see what's going on line pressure-wise.

Currently, I have a temperature sender installed in the driver side port.

Can anyone tell me if there are any additional ports located on a 700R4 where I could add a pressure sender, or am I going to have to remove the temp sender and install one in It's place? I would prefer to be able to monitor both.

Thanks.
Old 10-19-2010, 02:52 PM
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Car: 91 Z28
Re: 700R4 Pressure Port

I wouldn't reccomend tapping into that port for temp readings. I would say either tapping into the pan or a cooler line. That is going to be the best place to check your pressure.
Old 10-20-2010, 09:33 PM
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Car: 1987 IROC-Z Z28 Convertible
Engine: LB9
Transmission: 700R4
Axle/Gears: 3.23
Re: 700R4 Pressure Port

Be really careful....tapping into a trans can put small alum or metal filings into the trans and then you will need to over haul it. The other thing is there are MANY pressures....several clutch packs, main pump, etc....If you want to understand pressures, check out the pressure map in the trans overhaul service manual.
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