You will have to remove the oil pan and the rear main cap and then install a new seal.
You also need to make sure the PCV valve is working / positive crank case venalation.
Make sure when you get it apart that there is no groove cut into the crankshaft are it will not hold a seal.
If the crankshaft main bearings are worn, Then it may still leak oil from the seal.
GOOD LUCK.
Yes, this is when it would leak.
A leak happens
The cost to repair a rear main seal leak in a 2013 Chevy Equinox typically ranges from $600 to $1,200, depending on labor rates and whether any additional repairs are needed. This estimate includes the cost of parts and labor, as accessing the rear main seal often requires removing the transmission. It's advisable to get quotes from multiple repair shops for a more accurate estimate.
rear main seal
How do you change a rear main seal on a 2001 Chevy 2500 HD long bed
how do you change a rear main seal in a Chevy 350 motor
Could be the fron seal, rear seal, or pan gasket
You will have to replace the rear main seal. This will require that the transmission be removed.
Bad window seal?
Assuming we are talking about the rear oil seal on that transmission, if it has been replaced and it still leaks, check the condition of the universal joints in the driveshaft.
Yep, they have one. 1986 and older has a two piece rear main seal. 1987 and up has a one piece rear main seal.
Overheating can damage any seal.