Rear rumble during turns at intersections
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Joined: Jun 2007
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Rear rumble during turns at intersections
I have a 2003 F-150 XLT SuperCrew 4X4 5.4L with about 45,000 miles. Once the truck is driven about 30 miles or so and gets warmed up, I notice a rumble towards the rear of the truck when I pull out of an intersection to the left or to the right, but not when pulling out straight ahead. If I pull out slowly it doesn't make the sound, but if I try to accelerate slightly it rumbles while turning. Any suggestions on what that might be?
I bought the truck last year and it is a Ford Certified Used truck, all the fluids have been changed at a Ford dealership and are at the proper level.
Thank you for the posting on the FAQS page about the door ajar light, that was going to be my next question.
I bought the truck last year and it is a Ford Certified Used truck, all the fluids have been changed at a Ford dealership and are at the proper level.
Thank you for the posting on the FAQS page about the door ajar light, that was going to be my next question.
New User
Joined: Jun 2007
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dude get it fixed SOON. ford sells the lubricant for the rear differantial for like 3 dollarss its a 4ounce bottle. they should put it in for free too.. i let mine go to long and now i am replacing my clutch packs..( which is whats going to be bad in your truck) and now even maybe having to replace my differential...whoops
Senior User
Joined: Dec 2003
Posts: 150
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From: Aiken SC
My truck is doing something similar except its got kind of a low rumble all the time if its got this far is it to late to add the friction modifier. I don't really have the money for anything else. Or could it be warped rotors and worn brakes or a combination of both. Please help the noise is driving me crazy.
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Joined: Jul 2005
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brakes will change pitch when you apply the brakes slowly... clutch will normally only make noise when it slips -ie- turning acorner. bearings or pinion gear will make noise all the time when driving, may change pitch as you coast.
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Post Fiend
Joined: Feb 2000
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From: Kansas
Originally Posted by 79pos
My truck is doing something similar except its got kind of a low rumble all the time if its got this far is it to late to add the friction modifier.
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New User
Joined: Jun 2007
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If you change your gear lube with a synthetic lube like a Lucas Product, Lucas says it has a friction modifier in it. You you still need to add a modifier? With Ford products do you have to use Ford modifier or will a aftermarket work?
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Joined: Jun 2003
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From: SW VA
Originally Posted by 4RGSP
Then I guess you brought up another question. I have a 2003 F150 4x4 lariat with a 3.55 limited slip. How do you know what size of rearend it is?
If you have the 5.4L, then you have the 9.75 rear axle...