Need Help With 700R4 Valve Body Pressure Switches? - Third Generation F-Body Message Boards

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Need Help With 700R4 Valve Body Pressure Switches?

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08-06-2008, 05:17 PM

drb930

Junior Member

Join Date: Feb 2006

Location: Los Angeles

Posts: 98

Car: 1987 Chevy El Camino

Engine: 357 CID w/Lingerfelter Super Ram

Transmission: 700-R4

Axle/Gears: GN 8.5 342's

Classifieds Rating: (0)

Need Help With 700R4 Valve Body Pressure Switches?

87 El Camino had a 2004R and a 305 with a 4bbl.

Now has a 350 TPI 90-92 speed density 1227730 with a 700R4.
The code for the 700R4 is 3Yp, NO Aux valve body, Type 1 valve body.

My question is do i replace the valve body pressure switches with the ones for a 3YP?
There are 2 pressure switches, according to the factory manual they should be Normally Closed.
From what can tell the 3YP is from a 1983 Monte of Caprice.
trying to get the lock-up to work properly so i can use the TPI to control it.
Any help would be great.

Thanks,
Dave drb930@gmail.com

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__________________
1987 El Camino SS
Displacement = 357 CID 10.5-1.
Intake = Lingenfelter Super Ram w/30 lb injectors and now 52mm TB, from 58mm.
Heads = AFR 195 Street Eliminators.
Cam = Lingenfelter 219/219 .560/.560 112 LC.
Exhaust = Doug Thorley Tri-y 1 5/8" Headers, 2 1/2 collectors and 2 1/2 exhaust.
Computer = 1227730 w/NVSRAM and S_AUJP_V4 Bin File.
Transmission = 700-R4 going to 200-4R.
Rear End = Grand Nationals 8.5 Posi w/342's.
Brakes= In progress C-5 Front 13" 4 Piston and 12" Rear 2 Piston.