Diff. Fluid Change

Reply Subscribe

Thread Tools

Search this Thread

Jan 12, 2012 | 12:38 PM

Longdistancetrucker

Thread Starter

Senior User

Joined: Mar 2011

Posts: 206

Likes: 1

From: Yorktown, NY

Diff. Fluid Change

Just wondering, I've got a 2002 F-150 XL 4X4 w/ 66,120 miles, anyone else think its too old (age and mileage) to change the rear end fluid?

Jan 12, 2012 | 07:55 PM

blue2golf

Mountain Pass

Joined: Jan 2005

Posts: 184

Likes: 0

From: Evansville IN

Actually, mileage wise, I think it's too soon. Age wise, it's a good idea and it's not that difficult. Get the oil, get a new gasket, some RTV, set aside a saturday morning, tune the radio to Car Talk and enjoy.

Jan 12, 2012 | 08:58 PM

steve(ill)

Hotshot

Joined: Jul 2005

Posts: 11,931

Likes: 180

It is always a good idea fo drain and flush the factory fill oil on any system after a break in period. There can be wear materials from break in that can get into the bearings and cause shortened life. Go for it. NEw spec is 75 w 140 synthetic

Jan 14, 2012 | 08:42 AM

Longdistancetrucker

Thread Starter

Senior User

Joined: Mar 2011

Posts: 206

Likes: 1

From: Yorktown, NY

Thanks guys, gonna do it next weekend when its not raining....

should I use RTsealent or find a gasket for it? It has RTsealent on it now...

thanks again,
John

Jan 14, 2012 | 09:33 AM

steve(ill)

Hotshot

Joined: Jul 2005

Posts: 11,931

Likes: 180

Anthing built in the last 10-15 years uses RTV, not a gasket. Make sure the pan face is smooth and flat. Bump with ahammer if needed. I like the Red RTV.

Jan 15, 2012 | 12:22 AM

whitefordexplorer

Tuned

Joined: Jan 2008

Posts: 289

Likes: 0

From: Beaumont, CA

I use grey RTV silicon sealant. also, while you have the cover off, it would be a good idea to check to see if you have any mechanical issues, such as metallic shavings, or solid metal pieces in the diff. this could be a sign of serious failure.