SKU: 8563125931

70-71 Manual TCS Transmission Switch (Pin Terminal) - Out of Stock

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Description

70-71 Manual TCS Transmission Switch (Pin Terminal) - Out of StockReproduction 1970 1971 Corvette TCS transmission switch. Correct for manual transmission equipped Corvettes. Includes "pin" type electrical connection. Switch threads into the transmission providing electrical signal for TCS solenoid on intake manifold. GM Part 3961567 Transmission Controlled Spark (TCS) System controls exhaust emissions by eliminating vacuum advance in the lower forward gears while at operating temperature. The TCS intake manifold

Reproduction 1970-1971 Corvette TCS transmission switch. Correct for manual transmission equipped Corvettes. Includes "pin" type electrical connection. Switch threads into the transmission providing electrical signal for TCS solenoid on intake manifold.

GM Part 3961567

Transmission Controlled Spark (TCS) System controls exhaust emissions by eliminating vacuum advance in the lower forward gears while at operating temperature. The TCS intake manifold solenoid controls vacuum to the distributor's vacuum advance unit. The solenoid determines when, and how much, vacuum to release. Typically, a vacuum line from the carburetor enters the solenoid and another vacuum line exits the solenoid to the distributor vacuum advance unit (some applications have multiple inlet and outlet lines). The TCS solenoid relies on an electrical signal provided by other TCS system switches/senders via an electrical connection on the back or side of the solenoid (Engine Harness or TCS Harness plugs into this connection).

Model Years

1970 1971
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SKU: 8563125931

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4.3 ★★★★★
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Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
Intrinsically safe
Style: 250 Lumens
Works great and is hazardous environment safe
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 14, 2025
K
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Krylos
Massapequa, US
★★★★★ 5
Very useful if you don't want to explode!
Style: 90 Lumens
Found the unit a bit difficult to adjust on the hard hat but got it dial in eventually. Also impacted by the need to mount goggles on the helmet, that might be rare, but this was my situation working around chemicals. nice and bright. batteries last a couple of days with intermittent use approx. 3.5hrs a day. A bit of a pain to unscrew the cover on batteries but that's the nature of the beast to make sure no sparks escape. Would highly recommend the product. Most other comparable products are around double the price. BTW, the packaging looked like the driver dropped it on the road and ran over it a couple times...but it still worked. UPDATE #1: After a few months of usage, the height adjustment is starting to fail. As I walk, the light begins to droop until it's shining down in front of me. Dissappointed that the adjustment didn't last longer. I might be able to discover a way to lock it back in, but have not taken the time to examine the mechanism yet. UPDATE #2 9-2018: The adjustment problem has now reach its ultimate end. The hinge on bottom has basically disintegrated. Now, when I put batteries in and tighten the screw, the bottom hinge pops loose. The product is no longer usable. The hinge is just cheap plastic, that is a shame, I kind of expected better from nightstick. However, it still seems to be the best option vs. price available so I am planning to order it again. Hope I can get 3 years of intermittent use out of the next one. I do really like it when it is working...lite and bright.
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Reviewed in the United States on November 6, 2015
A
Verified Purchase
Aiden Griffin
Los Angeles, US
★★★★★ 5
Shipping
Style: 220 Lumens
Came in perfect condition works great not the brightest light but will work for me
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Reviewed in the United States on March 17, 2025
M
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Mark
Port Orchard, US
★★★★★ 5
They do the trick. That's for sure.
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Fantastic. They vary in thickness to accommodate different size punctures, they look nice, good value for the money, the sand out the tire and internal belt to stop leakage. and they easy enough the use.
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Reviewed in the United States on September 26, 2025
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ballpeen
Chelsea, US
★★★★★ 5
A must for tire repair
Size: 3 mm 4.5 mm 6 mm Tire, Number of Items: 3
Beats using a drill bit, this really is a must for tire plug, patch repair
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Reviewed in the United States on June 2, 2026

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