4th gear pressure switch part number? 200-4r lockup - Chevy Nova Forum
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Old 20th-February-2010, 03:18 PM   #1
Greg_R_63
 
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4th gear pressure switch part number? 200-4r lockup

I want to wire my 200-4r lockup in the same way as this Painless kit, with 4th gear lockup that can be cut off with the brake switch. I have a new solenoid, new connectors and wires, but I am uncertain of the 4th gear pressure switch. The one in the trans now has one terminal. I bought the trans rebuilt, and have not run it yet.

Mike Rowand has a good page on lockup wiring with a parts list, but his 700r4 setup is considerably more complicated than what I need. He does however have an extensive parts list, I just don't know which switch I need:

Pressure Switch (NO, Self-Grounding) 8642473 or 8627332
Pressure Switch (NC, Self-Grounding) 8642569 or 8634475

Any suggestions? Ideally, I'd just like to know which $5 switch Painless uses in their $145 kit.
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Old 21st-February-2010, 11:49 AM   #2
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YOu might also check out the BTO web site for some information on this.
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Old 21st-February-2010, 12:21 PM   #3
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Quote:
Originally Posted by Dan_Lebherz View Post
YOu might also check out the BTO web site for some information on this.

This page answered my question
. I ended up getting the 8642473 from GM Parts Direct.

BTO uses a 2 pronged pressure switch in their setup, so the diagram is a little different.
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Old 21st-February-2010, 01:04 PM   #4
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Are you going to run this through the brake light switch? I used an 86 Monte brake light switch (without cruise) to give me the extra NC switch to run power to the lockup solenoid.
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Old 21st-February-2010, 01:15 PM   #5
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Quote:
Originally Posted by 72VenturaII View Post
Are you going to run this through the brake light switch? I used an 86 Monte brake light switch (without cruise) to give me the extra NC switch to run power to the lockup solenoid.
Yes I am. BTO sells a kit that is just a brake switch, a transmission connector at the case, a fuse, and the wires.
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