FYI for 700R4 trans swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scsindust · 08-21-2009, 05:35 PM

I went to my local GM dealer looking for the vacuum switch for the TC release. I am using a different one than stock, which I found out about from a link about wiring these up. Stock opens at 3.5" and this one opens at 7.5" so the engine doesn't bog so hard before the TC releases. Anyway, the dealer told me this part had been discontinued and only a few dealers had any stock left. So if anybody needs this switch, let me know, as I have a current list of what dealers have how many. There are only maybe a dozen of these parts left. So get 'em while you can!!

Here is the link to the wiring website:
http://www.73-87.com/7387garage/drivetrain/lockup.htm

08-21-2009, 05:35 PM	#1
scsindust Registered User Join Date: May 2009 Location: Jessup, MD Posts: 57	FYI for 700R4 trans swap I went to my local GM dealer looking for the vacuum switch for the TC release. I am using a different one than stock, which I found out about from a link about wiring these up. Stock opens at 3.5" and this one opens at 7.5" so the engine doesn't bog so hard before the TC releases. Anyway, the dealer told me this part had been discontinued and only a few dealers had any stock left. So if anybody needs this switch, let me know, as I have a current list of what dealers have how many. There are only maybe a dozen of these parts left. So get 'em while you can!! Here is the link to the wiring website: http://www.73-87.com/7387garage/drivetrain/lockup.htm __________________ Jamie Play truck / kid hauler - 1989 V2500 Burb 4x4, 350, 700R4, 4" lift, headers, elec fans, the normal mods. Getting ready for the LS1 swap!!



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