Noise when in reverse....
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Freshman User
Joined: Nov 2002
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From: Fort Worth USA
Noise when in reverse....
Hi all!
I'm new here at FTE and have a question.
My new truck seems to make an odd noise when turning while in reverse. It makes a steady "thump-thump-thump as long as it's turning up while backing up.
Truck info:
'03 F350, CC Lariat, PSD, DRW, 4x4, 8' bed
It has less than 200 miles on it so it's going to the dealer tomorrow but I'm hoping someone can give me an idea of what the dealer might say it is.
Yhank in advance,
Earl
I'm new here at FTE and have a question.
My new truck seems to make an odd noise when turning while in reverse. It makes a steady "thump-thump-thump as long as it's turning up while backing up.
Truck info:
'03 F350, CC Lariat, PSD, DRW, 4x4, 8' bed
It has less than 200 miles on it so it's going to the dealer tomorrow but I'm hoping someone can give me an idea of what the dealer might say it is.
Yhank in advance,
Earl
Posting Guru
Joined: Mar 2002
Posts: 1,429
Likes: 2
Noise when in reverse....
[updated:LAST EDITED ON 10-Nov-02 AT 08:18 AM (EST)]Check your hubs,because they're probably locked in.It seems that they are delivered this way.If they are locked then unlock them and your noise (normal) will disappear.
BTW,Welcome!
Enjoy your new truck.:-)
BTW,Welcome!
Enjoy your new truck.:-)
Thread Starter
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Freshman User
Joined: Nov 2002
Posts: 27
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From: Fort Worth USA
Noise when in reverse....
[updated:LAST EDITED ON 10-Nov-02 AT 08:28 AM (EST)]Thanks for the quick response.
I thought that's what it might be so I did look at them yesterday and both hubs were in the "auto" position.
It does sound/feel like normal 4WD noise but hubs are unlocked and ESOF switch is in 2WD position.
I traded in a '99 F150 4x4 and never had this problem. It made lots of strange noises when in 4WD but nothing in 2WD.
Earl
I thought that's what it might be so I did look at them yesterday and both hubs were in the "auto" position.
It does sound/feel like normal 4WD noise but hubs are unlocked and ESOF switch is in 2WD position.
I traded in a '99 F150 4x4 and never had this problem. It made lots of strange noises when in 4WD but nothing in 2WD.
Earl
Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Noise when in reverse....
Are we sure its coming from the front?
Only in reverse? is it only turning one direction?
do you feel it in the steering wheel or seat of your pants?
or just sound?
any shudder on take of in straight line?
Rich
Only in reverse? is it only turning one direction?
do you feel it in the steering wheel or seat of your pants?
or just sound?
any shudder on take of in straight line?
Rich
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Freshman User
Joined: Nov 2002
Posts: 27
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From: Fort Worth USA
Noise when in reverse....
Monsta,
Does the vehicle need to be jacked up to check the half-shafts? I tried to turn them with the wheels on the ground but it didn't look like anything was going to turn like that.
FortyFords,
Actually, it seems like the front left. Haven't had a chance for any to listen/watch from outside the vehicle so I'm really not sure.
I've noticed it in forward once or twice since my original post.
It feels like my F150 did when turning on pavement and in 4WD. Like something is binding.
The only other thing I've noticed is that when traveling straight down the highway, the steering wheel is turned about 4 or 5 degrees to the left when tracking straight. If I turn steering wheel where it's parallel to the horizon, the truck will ease to the right.
I'm guessing this is an alignment problem which I'll get the dealer to address as well.
Maybe the "thumping" is tied to this somehow.
At any rate I'll find out tomorrow and report back.
Thanks,
Earl
Does the vehicle need to be jacked up to check the half-shafts? I tried to turn them with the wheels on the ground but it didn't look like anything was going to turn like that.
FortyFords,
Actually, it seems like the front left. Haven't had a chance for any to listen/watch from outside the vehicle so I'm really not sure.
I've noticed it in forward once or twice since my original post.
It feels like my F150 did when turning on pavement and in 4WD. Like something is binding.
The only other thing I've noticed is that when traveling straight down the highway, the steering wheel is turned about 4 or 5 degrees to the left when tracking straight. If I turn steering wheel where it's parallel to the horizon, the truck will ease to the right.
I'm guessing this is an alignment problem which I'll get the dealer to address as well.
Maybe the "thumping" is tied to this somehow.
At any rate I'll find out tomorrow and report back.
Thanks,
Earl
Posting Guru
Joined: Mar 2002
Posts: 1,429
Likes: 2
Noise when in reverse....
One simple way to check to see that the hubs are indeed unlocked is to have someone at a safe distance look at the axles where the u-joints are and see if they rotate while you move slowly fwd.or rev.
BTW,I assumed you had the manual hubs.From reading previous posts here it seems as if they are locked as delivered from the factory.
BTW,I assumed you had the manual hubs.From reading previous posts here it seems as if they are locked as delivered from the factory.
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Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Noise when in reverse....
Too answer for Monsta ,No ! it doesn't need to be jack up !
if your hubs are truely unlocked you can reach in and turn the shafts and u-joints to see if there free.
Rich
if your hubs are truely unlocked you can reach in and turn the shafts and u-joints to see if there free.
Rich
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Joined: Oct 2001
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From: Washington State
Noise when in reverse....
>Monsta,
>
>Does the vehicle need to be jacked up to check the half-shafts? I tried to turn them with the wheels on the ground but it didn't look like anything was going to turn like that.
The I'd say your hubs did not unlock. No need to jack it up, as stated before by Forty.
No sense in crawling completely under your truck to turn the front driveshaft. Reach behind the wheel, locate the U-joint, attempt to spin it. If it does not move, rotate the Auto/Lock switch on the hub a few times until you can spin the U-joint. (End on Auto)
>
>Does the vehicle need to be jacked up to check the half-shafts? I tried to turn them with the wheels on the ground but it didn't look like anything was going to turn like that.
The I'd say your hubs did not unlock. No need to jack it up, as stated before by Forty.
No sense in crawling completely under your truck to turn the front driveshaft. Reach behind the wheel, locate the U-joint, attempt to spin it. If it does not move, rotate the Auto/Lock switch on the hub a few times until you can spin the U-joint. (End on Auto)
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