Yes, too much oil can cause a rear seal to leak. When the oil level is excessively high, it can increase pressure in the crankcase, leading to oil being forced past the seals. Additionally, the excessive oil can cause foaming, which reduces lubrication effectiveness and increases the risk of leaks. Regularly checking and maintaining the correct oil level is essential to prevent such issues.
It is possible the seal is just worn out but check the driveshaft u-joints. If a u-joint is bad it could cause the driveshaft to wobble putting extra strain on the rear seal.
Bad seal or loose drain plug.
A blown out rear axle seal will cause grease to leak out into the brake drums
A leak happens
two or three things to look at are the rear quarter glasses tend to leak after 8-10 years if you have a sunroof the drains can clog and cause leaks on a coupe the trunk lid seal can rot and leak on a fastback the seal for the rear wiper arm can rot and leak as can the rear washer nozzle
rear main seal
There are a few different reasons this could happen. The most likely cause if you lost that much oil that quickly is a rear main seal. This is a "main seal" in the back of your engine, this seal can leak severely over time and mileage. The engine typically has to be removed to replace this seal.
Could be the fron seal, rear seal, or pan gasket
Depends on where the leak is falling from it could be the rear main seal leak, transmission back part connected to the transfer case, or a front main seal leak, the transmission part connected to the engine block also a possiblity is the shifter gear box if you have a standard, which also be in the front near the front main seal.
It cost me $817.50 in a 97 Holden rodeo 4x4
You will have to replace the rear main seal. This will require that the transmission be removed.
Bad window seal?