Engine/Transmission (1998.5 - 2002) is transmission getting to hot ?

[CFowler]

hi, from new to this past summer my auto transmission never got above 150 deg. last summer i was seeing 175 -210 deg. i had changed the filter & oil in pan @ around 10k miles(put in drain plug in pan) and was good untill lass summer. recently i added a deep pml pan and the transmission oil i replaced looked dark. the cooler does not look dirty at all. what else to check? today it was 35 deg. and already the temp. is 175 deg. runnin around town empty. on the hiway it runs 110-120deg. thanks carl

 

[RAJohnson]

Something has to be slipping to create heat. Torque converter, Band adjustment. I assume it is stock? How many miles? Do you or have you towed allot in the past?

 

[CFowler]

yes the motor is stock, 41k miles and never used to tow and always empty. the transmission seems to work perfect, no slipping ,shifts great and i like to keep it this way, thats why im concerned about the heat. any ideas ?

 

[Bob Wagner]

where are you taking you temps? pan or line to cooler?

 

[CFowler]

the line to the cooler.

 

[SnoKing]

the line to the cooler.

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Stop and go traffic will cause the output temp to rise. On the highway when everything is locked up, if you are seeing the 110-120 range you should be ok. There is a service bulletin that says DC ATF+4 will look dark and color can not be used to judge condition. Or maybe that is in your owners manual. At any rate I read it somewhere. SNOKING

 

[J.Post]

The back of the radiator gets a lot of oil in it from the crank case breather hose. This can cause overheating of the coolant and can also cause the transmission temps to rise.

 

[w gilmer]

C F I Dont Know About Your Year Model But On A Early 99 Thre Is A Auto Transmission Cooler (or Heater) If You Are In Stop And Go Traffic Located On Passenger Side Of Engine Just Above Oil Pan Close To Firewall Whice Has Engine Coolant Running Through It. My Truck Runs Around 130 To 150 On Highway. It Runs 150 To 190 In Town. Hope This Helps Explains Variance In Temp. Walt Gilmer

 

[keimmmo]

In stop and go traffic, if I leave the trans in gear, the temps QUICKLY rise to 190 degrees. With any amount of time idling in gear, it will climb to 220! Putting it in neutral when stopped keeps the temps to 190 max... usually even lower.



At highway speeds in lock-up, the trans runs 130-140 degrees... even towing. Everything feels and works fine.



Steve Keim

 

[jtwcummins]

High transmission temps are normal in traffic for the 47re. The amount of fluild flow is determined by the accel pedal position, at idle in gear almost no flow and you get more heat. Put in neutral at long stops and raise rpm alittle and it helps. Also, cools down alot faster if the OD is left off in heavy traffic.

I can go over 210* fast in hot weather, 80-100*, in traffic. Having the sensor in the line is the hottest place to track the temp. If you shutdown and restart in neutral you will notice the trans fluid temp is substantially lower than when you shutdown. There is also almost no fluid flow in Park.

 

[SnoKing]

There is also almost no fluid flow in Park.

In the stock transmission! DTT mods for flow in park. SNOKING

 

[CFowler]

thanks to all that replied. maybe im paranoid,but rather ask you guys than burn up the transmission thanks carl