700R4 Information Thread

Ricko1966 · Apr 25, 2024

squaredeal91 said:
On my R4 I have lockup on a switch and it does the job.
I know there is a way to add in pressure switches and daisy chain them to lock and unlock on its own. Do you or someone else on here have a wire diagram for this so I can make my own harness?

It easy there's already a 4th gear pressure switch in the pan in the valve body. Supply 12v to the transmission,use the existing 4th gear swich to turn on and off the lockup solenoid. Just look at the 4th gear switch as if it was a toggle switch that turns on the lock up solenoid in 4th gear. Interrupt the 12v supply with a toggle if you want the option of disabling lock up.

Rkendrick05 · Jul 2, 2024

Looks like the 3/16 plate and a couple new holes is going to be the way to go.

mibars · Tuesday at 5:56 AM

Maybe an unusual question, but do you know what's the volume of fluid pumped by the oil pump in this transmissions?
It's just out of my curiosity to undersand how the auto transmissions works and how efficient it is. By knowing volume and pressure (and pump efficiency) a hp loss can be calculated .

NickTransmissions · Tuesday at 7:55 AM

mibars said:
Maybe an unusual question, but do you know what's the volume of fluid pumped by the oil pump in this transmissions?
It's just out of my curiosity to undersand how the auto transmissions works and how efficient it is. By knowing volume and pressure (and pump efficiency) a hp loss can be calculated .

I don't but maybe others on here do...You can also contact Dana Wilkes at Probuilt Automatics to see if he knows or the folks at Automatic Transmission Service Group. It's def something the GM Powertrain engineers would be in a position to answer but I have no idea who they are or how to contact them.

700R4 Information Thread

Ricko1966

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Rkendrick05

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mibars

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NickTransmissions

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