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**pjmoreland** · 11-03-2022, 05:07 PM

The speedometer does seem accurate. I haven't tested it with a GPS, but it is smooth and consistent, and my gut says it's about right. I will do a GPS test.

I wonder if there's something going on with the temperature switch inside the transmission. I believe it can cause the TCC to lock up sooner than normal. It could also be that someone swapped in a transmission from another year that doesn't have the correct internal wiring. I'll need to drop the pan soon to do a filter service on it anyway, so I'll take a look.

11-03-2022, 05:07 PM	#142
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,315	Re: 700R4 TCC Wiring The speedometer does seem accurate. I haven't tested it with a GPS, but it is smooth and consistent, and my gut says it's about right. I will do a GPS test. I wonder if there's something going on with the temperature switch inside the transmission. I believe it can cause the TCC to lock up sooner than normal. It could also be that someone swapped in a transmission from another year that doesn't have the correct internal wiring. I'll need to drop the pan soon to do a filter service on it anyway, so I'll take a look.