Author Topic: 1970 Brake Distribution/Pressure Differential Switch  (Read 3783 times)

sah62

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1970 Brake Distribution/Pressure Differential Switch
« on: January 02, 2015, 06:28:06 PM »
I could use some help identifying a pair of original brake pressure differential switches. I've attached a pair of pictures that I hope will better explain my question.

Which of these (if either) is a 3983040 brake pressure differential switch as used on a 1970 Camaro? The only difference I can see is that the cleaner one includes a plugged fluid port in a place where the dirty one is solid. The internal parts are identical. I have two like the dirty one that I bought as advertised for a 1970 Monte Carlo (which the parts catalog seems to group with Chevelles) and a 1970 Camaro. So, what are these? What other cars were they used on?

Thanks for any insights...
Scott Hollenbeck
Administrator, Mustang 428 Cobra Jet Registry
Owner, Muscle Car Research LLC
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L78 steve

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Re: 1970 Brake Distribution/Pressure Differential Switch
« Reply #1 on: January 03, 2015, 06:15:36 PM »
My 70 Nova has this set-up. I will snap a pic. when I get home Tues.
69 Z/28 Dover White. SOLD
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C. SOLD
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B

L78 steve

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Re: 1970 Brake Distribution/Pressure Differential Switch
« Reply #2 on: January 25, 2015, 08:49:41 PM »
Pics. 70 Nova. This set-up is 70 only Nova and Camaro. It has the distribution block, frame valve and golf ball valve all together. My dist. block does not have the extra port that one of yours has.
69 Z/28 Dover White. SOLD
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C. SOLD
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B