2009 sierra 1500 transmission pan gasket

[thearborbarber]

Maybe ms3dale of govtech4 will chime in. For the past year I have been fighting my transmission pan gasket weeping about a 1/4 quart of fluid every 3000 miles. Using die I can trace it back to the pan gasket on the passengers side front corner. I used a wix filter kit first and it stayed dry for about a 1000 miles and started weeping. Never had this problem with the other wix kits on the 700r4 on my 91 sub or the 4l60e on the 99 camaro. Then I used an ATP filter kit and it made it about 600 miles. This is for the 4L60E transmission. I am torquing the pan bolts to 100 inch pounds with a torque wrench. What is the difference between the pan gasket material of GM's verses aftermarket?

[gmtech4]

GMs is reusable ,,,

 

also check the dipstick tube real close where it goes into the housing ,,,,clean it with brake cleaner or equivalent and compressed air if available

 

a smal layer of silicone wil help, but if you torqued it and it leaks and the gasket isnt torn ,,,,,,,,hhhmmmmm

 

the vent should be fine ,its at the top of the bell housing

 

Rob

[thearborbarber]

The factory one weeped after about 40000 miles. Using the black light and glasses I see it glowing around the pan. Nothing around the dipstick tube, vent or where the cooler lines go into the transmission. These is dye around the pan gasket on the front right corner about 6 inches along each side of the corner. The dye then goes to the bottom of the bellhousing, down the oil pan and drip onto the sway bar.

[gmtech4]

clean it off again and check the bellhousing first ,could be the TC seal

[txab]

clean it off again and check the bellhousing first ,could be the TC seal

+1

 

Are you checking your pan sealing flange for flatness?

[thearborbarber]

Did as suggested. Pulled the small inspection covers and found tranny fluid coming down the front of the tranny. Dexron VI is hard to see without the aid of dye!

 

Time for a trip to the tranny shop.

[gmtech4]

Did as suggested. Pulled the small inspection covers and found tranny fluid coming down the front of the tranny. Dexron VI is hard to see without the aid of dye!

 

Time for a trip to the tranny shop.

no warranty left ?