2017 Jayco Precept rear diff fluid change

[GMA385]

( Apologies for side view pics)

I've searched through the forums and although lots of threads on changing rear differential fluid nothing seems to match my situation. From the pics I've posted can someone tell me for sure if the plugs are the drain and fill plugs?Also, what rear end is this? My Ford manual states the diff fluid should be changed at 24,000 miles if towing at highway speeds and over 70 degrees. Am I reading that right? Does pulling a toad apply? It also states 75w-140 fluid. Thanks in advance for any input.

[GMA385]

[Xjaywalker]

Mine is an F53 Chassis. Your pictures look totally different then mine. For the Ford F53 chassis, I believe this is under "Special Operating Conditions" and if I understand the manual correctly this applies to commercial vehicles which are constantly towing in warm and/or hot road conditions.

The standard for mine is to change every 100,000 miles. I spoke to my mechanic about this very concern and he said at 50,000 miles I am good for another 50,000 miles, and yes we tow a 4500 lb SUV in warm to hot conditions (we live in SE Arizona). But maybe only put about 4-6K miles per year. I am all for the peaceful easy feeling of knowing I am ahead of the schedule. That being said, if you want to change it, by all means. Then you know exactly where you stand on your maintenance. From what I hear its easy but messy. LOL - Let us know what you come up with.

[twinboat]

The book says AND full throttle at 45 MPHs.

Do you keep it to the floor while driving ?

[Flyer15015]

Not a big deal to change oil in a diff.
Bottom plug is the drain, and the top one is the fill and level check plug.
Just fill it up till it drains from the top hole and slap the plug in.
Easy, peasy.........

[GMA385]

Originally Posted by Xjaywalker

Mine is an F53 Chassis. Your pictures look totally different then mine. For the Ford F53 chassis, I believe this is under "Special Operating Conditions" and if I understand the manual correctly this applies to commercial vehicles which are constantly towing in warm and/or hot road conditions.

The standard for mine is to change every 100,000 miles. I spoke to my mechanic about this very concern and he said at 50,000 miles I am good for another 50,000 miles, and yes we tow a 4500 lb SUV in warm to hot conditions (we live in SE Arizona). But maybe only put about 4-6K miles per year. I am all for the peaceful easy feeling of knowing I am ahead of the schedule. That being said, if you want to change it, by all means. Then you know exactly where you stand on your maintenance. From what I hear its easy but messy. LOL - Let us know what you come up with.

Mine also is an F53. 22K (2017). What year and size is your chassis. Yes as I was researching a diff change mine looked different. Thats where my confusion came in. Also after more research I did find Ford recommends change at 105000.

Thanks for everyone's input.

[GMA385]

Originally Posted by twinboat

The book says AND full throttle at 45 MPHs.

Do you keep it to the floor while driving ?

No. Didn't really understand that. 45mph at full open throttle. Makes no sense to me. Has to be a different type of commercial vehicle?