The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 700R4 overdrive question regarding lockup

Andy4639 · 05-05-2013, 03:41 AM

I have mine hooked up through a toggle switch. It will only lockup in 4th gear when it's over 45MPH anyway. I had the vacume switch for awhile and then took it off because I didn't need it. No brake switch either. Yes if you are running at speed and slam on the brakes sometimes it want release as soon as it should but I haven't had that many stops like that to borther me.
I can leave it unlocked and it's like a tow mode like on the new vehicles.Normal driving it will unlock at any speed under 45MPH without doing anything.

05-05-2013, 03:41 AM	#14
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 700R4 overdrive question regarding lockup I have mine hooked up through a toggle switch. It will only lockup in 4th gear when it's over 45MPH anyway. I had the vacume switch for awhile and then took it off because I didn't need it. No brake switch either. Yes if you are running at speed and slam on the brakes sometimes it want release as soon as it should but I haven't had that many stops like that to borther me. I can leave it unlocked and it's like a tow mode like on the new vehicles.Normal driving it will unlock at any speed under 45MPH without doing anything. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.