700r4 hyd lock up kit
Thread Starter
Le Mans Master
Joined: Nov 2006
Posts: 5,032
Likes: 204
From: Greenwood Indiana
2021 C4 of the Year - Modified Finalist
C4 of Year Finalist (appearance mods) 2019
700r4 hyd lock up kit
I have an 89 700r4 in my 63 Nova. I put in a B&M Trans Kit and a hydraulic torque converter lock up kit in it. Problem is, It stays in 1st and 2nd correctly in manual. It will not stay in 3rd (goes into 4th when it wants to) when in 3rd. In drive, all gears shift way too early. I've tried adjusting the TV cable at least 100 times. Do the two aftermarket kits mess up the way a trans works if you combine them? Any suggestions before I take it to a shop?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
I have never had good luck with the aftermarket lock up kits that use a vacuum switch.
I personally prefer a 4th gear lock up only wiring arrangement. Easy to do and the cost is near free. The drivability(in my opinion) is perfect.
I personally prefer a 4th gear lock up only wiring arrangement. Easy to do and the cost is near free. The drivability(in my opinion) is perfect.
Thread Starter
Le Mans Master
Joined: Nov 2006
Posts: 5,032
Likes: 204
From: Greenwood Indiana
2021 C4 of the Year - Modified Finalist
C4 of Year Finalist (appearance mods) 2019
When you say "almost free", how do I do it and what do I need? (I don't have the plug-in that goes into the tranny) Is there a GM part #?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
You can swap the piece that plugs into the trans case. It will be a single blade terminal that will easily accept a female terminal end. Run 12 volts ignition power to the single connector. On the inside of the trans, run the wire to the positive side of the solenoid. Run the ground side to the 4th gear pressure switch.
Viola....4th gear only lock up
Viola....4th gear only lock up
