Join Date: Jan 2000
Location: Atlantic Beach, Fl. USA
at my shop we just finnished installing a 200r4 into a 78 corvette. the transmission we took out was a th350. what we did to insure lock up was to take the hot wire from the stop light switch. On this corvette it has a 4 prong stop lite switch. 2 of the connectors are for the stoplites, and 2 are for the cruise control. The cruise side of this switch is "normally closed" ans when the brakes are applied it "opens" the switch. this would unlock the converter when the brakes are applied. we also put a SPST toggle switch in line of this switch to keep the converetr from locking up in stop and go traffic.
IF your trans has a switch screwed into the valve body, you can have 4th gear lockup only, and If you put a toggle switch in the wire going to it you will be able to trun off the lock up feature when driving in traffic 35-50 mph stuff. I own a Grand national, and because of my 67 Chevelle, I have not done the toggle switch yet, and it is kind of annoying to drive in the 35-50 rush hour traffic.
HTH Chip Parman
1967 ss396 clone. powdercoated frame,suspension,r12 bolt posi,7004r, and just about everything else! 502,700r4,12 boltposi, ps,pb,fact. a/c,pw, tilt, buckets. Teakwood steering wheel. I LOVE MY CAR ! 2200 MILES NOW