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**pjmoreland** · 09-15-2021, 12:31 PM

Is there a wire connected to the D pin on your transmission? Your 88/89 transmission will likely need the D pin to be connected to ground.

09-15-2021, 12:31 PM	#3
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,337	Re: 700R4 LockUp Troubleshooting Is there a wire connected to the D pin on your transmission? Your 88/89 transmission will likely need the D pin to be connected to ground.