No Electric 700R4 Converter Lockup I am going from memory (12 years ago) here so my details may not be 100% accurate, the guy who modified and built my 700R4 that was in my 82 diesel Blazer added a ball in the solenoid , how it works is at about 36 mph the converter will lock up and remain locked until you either step on the brake or the speed drops below 36 mph, he said I didn't have to hook up any wires to the trans and it would work ok, he also said it was possible to kill the engine in a panic stop if you locked up the brakes but was more worried about killing the engine while driving in snow and making a panic stop, he also said that it might unlock the converter if you held it WOT at hwy speeds under certain conditions, all I know is if you counted the shifts from a standing stop the trans shifted like a 5 speed automatic and had engine braking until you got to about 35 mph and the converter unlocked, you could force the converter to unlock by tapping the brake at hwy speeds. Remove pan, filter, solenoid
There is a .310 steel ball inside
With ball removed.
Hole that solenoid goes into
I found this on another web page Also no electric is needed for convertor l/up. Installing a 1/4" check ball ( same size as used in the 700) into the hole on the end of the solenoid will l/up the convertor in 2, 3 and 4th. It downshifts very harshly though since the convertor is locked. A 5/16" check ball is OK also. I have found the brake light switch cancel feature un necessary for 90% of cars. Also you speak of the convertor un locking on down hill coasting and saving some gas as the rpm drops. What is happening inside the trans is a one way sprag is "over running" and can over heat if you have a long coast. The sprag is designed to over run, but not for a long period. At low rpm the cooler/lube flow is reduced.
My 700R4 swap The donor trans and transfercase Some good 700R4 transmission links bowtieoverdrives.com 700r4.com The 700 Raptor Throttle Valve Cable system 101 700R4 wiring diagram http://www.gsdi.org:8088/Tech/700R4/lockup.htm http://www.highperformancecars.com/crosley/lockup2.htm http://purplesagetradingpost.com/sumner/techinfo/700R4p3.html Wiring A Lockup-Converter Pressure Switch
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