Q: What is the right way to install the rear main seal?

asked by on February 04, 2018

I'm replacing the rear main seal. I've bought the fel pro BS 40620 which came with no instructions. Throughout my research I've found mixed answers as to how it should be installed. My questions are: Does it go on dry or greased and does it go on the same way the OEM was on or backwards? Thank you!

My car has 123000 miles.
My car has an automatic transmission.

Hi Justin. Thanks for contacting us today. If you are replacing the rear seal, you really should purchase a service and repair manual for your Ford F-150, as following each step in the right order is crucial to ensure a proper seal and reduce the potential of leaks. Unfortunately, since we can’t attach any documents or images to this platform, your best bet is to download a service manual online.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

emmissins test says i need oxygen sensor heater

Hello, thank you for writing in. The error message you got about the low threshold means the oxygen sensor has failed, the fuel system is off, or the catalytic converter is having issues. The amount of information available isn't enough...

Temperature gauge​ reads a little lower on highway

Hi There, It sounds like you may have a faulty thermostat. The thermostat regulates the flow of the coolant in your car's engine and controls when the coolant flows in and out of the motor from the radiator by opening...

How much to replace a steering column? 2010 Vauxhall Corsa 1.2 Energy

Hello - unfortunately, this is not a service YourMechanic offers at this time. Thanks for thinking of us though!

Car lost acceleration, now it will not start.

Hello. When dealing with an issue like this, there are so many components that can effect stalling and starting that we need to start with the basics. Once of which is to simply make sure the battery is charged. If...

Front passenger tire caved in.

Hello. If the front wheel caved in then it may be possible that the wheel bearing that was freshly installed may have come undone or let go. This can happen if the wheel bearing was not installed correctly. The same...

I get trouble code P2138, but I have cleared it and the car works for a while. Now I am getting trouble code P2127 along with P2138.

Hi there. The pedal position sensor on the gas pedal has lost signal for the switch 'E' and 'D'. The code P2138 means that the computer has discovered a malfunction with the pedal sensor. Check the harness to the...

Cooling fans not working. Replaced sensor, relays, thermostat and radiator fan.

Hello there, many different faults will cause the fans on your 1995 Chevrolet Camaro to not turn on. You have replaced many of the common failure points, but there are a few other potential causes. The most likely is the...

Replacing driver's seat

Hi there, thanks for writing in. You can use the same bucket seat out of any GM truck whether it is a GMC or Chevrolet from the years of late 1989 all of the way up to 1998. This can...

Got oil change made it to gas station and it cranks but won't start

The cause for the van not starting should not be related in any way to the oil change. The only thing that may have happened could be the mechanic may have accidentally bumped a sensor or a wire. I would...

Related articles

Top 10 Best-Selling Cars of 2016
Ford F-series pickup trucks, Toyota Camry, and Honda Civic are some of the best-selling cars of 2016 and all deliver on reliability and efficiency.
2012 Ford Escape vs. 2012 Honda CR-V: Which One Should I Buy?
SUVs represent one out of every three vehicles sold in 2012, making them one of the most-purchased types of vehicles in the country during that time period. Compact SUVs are a sub-class that are slightly smaller and offer the most...
2012 Chevrolet Malibu vs. 2012 Ford Fusion: Which One Should I Buy?
When you want a midsize sedan, you’re looking for something that will offer you the best fuel economy for the size as well as additional safety features that will keep your family safe while you’re driving across town or around...