G50: Do Transmission Termp. Sensors Fail? Symptoms?

[sdkhalsa]

On my 94' G50 I have noticed that the transmission shifts very harshly when moderately warm. Here in Arizona the temperature is now in the 90's, and all of a sudden the harshness has disappeared. Transmission also smooth before reaches full warm-up temp. Does this sound like an erratic transmission temp sensor? Does the Consult provide readings on this sensor? Ideas?

[Q45tech]

Of course the Consult does..............connector corrosion? at either end of harness.

An interesting test/modification is to vary ^ the viscosity of ATF by using Redline High Temp ATF in increments 10%..............drain 2.5 add 1-2 quart [HT-ATF] to refill.

http://www.racerpartswholesale.com/redtech4a.htm

Each quart substituted will increase viscosity 3.3% so even 3 would be only 10%

About 2000 I tried 100% HT-ATF until winter when I had to cut it 50/50 so even that was ok.

[Skibane]

An interesting test/modification is to vary ^ the viscosity of ATF by using Redline High Temp ATF in increments 10%

Higher viscosity = higher line pressure??? = firmer shifts???

[Q45tech]

The FSM shows the pressure test ports and values. Make sure TPS idle 0.4-0.45 volts is spot on.

How many minutes and seconds does a BG Machine flush/fluid exchange take------ that time shows the pump and seal health [flow volume per minute] ~~3 minutes 30 seconds no more than 4 minutes.

[sdkhalsa]

Thanks Q45tech. Plan on implementing your test. Should have my Consult link arriving in a few days and will see what kind of values that yields as well. What about the test approach of using a fixed value resistor in place of the transmission sensor? Maybe disconnecting the temp. sensor harness at the outside of transmission and inserting a resistor at the TCU connector. The resistance value would be that of full operating temperature.

[Q45tech]

Never used a software Consult not sure how much of transmission diagnostics they implemented.

Pin 33 on TCU 1.5 volts ~~68F and 0.5 volts~~176F or inversing 0.01volts per 1F ATF temp.

[Infinitiguy19]

Was the Automatic Transmission (A/T) fluid temperature sensor meant to be used as a accurate way to measure fluid temperature?

I am not questioning how accurate the sensor is but rather why there is some overlap in the A/T Fluid temperature VS Volts scale. I know for a fact my calculations are correct as them have been check over meticulously even shared with some members.