87c10

2 questions
1- I'm putting my transmission temperature gauge in the cooling line. Should I put probe before or after cooler ?
2- on a 4l80e what line is wich comming out of transmission case ? Is the back line in and the front line out ? ( cooler lines )

Krom

rear line is return back to the trans

10droped

iTrader: (1)

On my 4l60e there is a bolt/fitting on the drivers side of the trans case, I removed that and put my sender there. Not sure if the 80 has that or not just another option for you.

TomM

iTrader: (56)

Put it before the cooler, you want to know how hot your trans is, not how cool the fluid is....

T,

Jimbo1367

Before. I out a fitting in the trans pan for mine.