Does your 4Runner have a transmission thermostat?

[Burgi]

My transmission on my sr5 4x4 is absolute dog poop. Constantly slamming gears, jerks, bucks etc. I went to check the transmission fluid which requires you to pin the thermostat. I don’t have a thermostat. I went to the dealership and looked under a bunch of Tacomas and 4Runners and they all have transmission thermostats. The dealer didn’t have any sr5 models but I looked at TRD OR and a limited and they have thermostats. Did they forget to install one at the factory? Can anyone with a 4x4 sr5 take a look at theirs? Thank you


Mine

TRD OR

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[Dr_Al]

I don't know about the 4Runner but my Tundra has the heated radiator line that goes from the engine to the cab heater core and then to the transmission. It's job is to heat up the transmission. Once it's at temp then keeps the temp at a specific temp. My Tundra also has an external radiator (part of the towing package) that adds extra cooling. That has a thermostat that has to be bypassed so trans oil flows to it when checking the oil level. The Tundras that don't have the extra cooler don't have the thermostat. By looking at those pictures I'm guessing you don't have a thermostat.

 

[Burgi]

I don't know about the 4Runner but my Tundra has the heated radiator line that goes from the engine to the cab heater core and then to the transmission. It's job is to heat up the transmission. Once it's at temp then keeps the temp at a specific temp. My Tundra also has an external radiator (part of the towing package) that adds extra cooling. That has a thermostat that has to be bypassed so trans oil flows to it when checking the oil level. The Tundras that don't have the extra cooler don't have the thermostat. By looking at those pictures I'm guessing you don't have a thermostat.

thanks for the reply. I looked all through the cooling system and can’t find one anywhere. I do not have an extra cooler either. All I have are the radiator and an intercooler for the turbo.

 

[mmjsport]

I'm curious if we could add a theromstat and how much of a difference it would make.

 

[Vincenzo]

If you plan on towing, your vehicle is the perfect candidate for an external cooler.

 

[bkw777]

I don't know where the physical sensor is, but the dash has a display option that shows transmission fluid temp and oil temp. SR5 4WD

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