Shudder
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Freshman User
Joined: Apr 2005
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From: Michigan
Shudder
I have an 03 F-150 4x4. I've noticed in the last couple weeks that from a dead stop when I take off and turn a corner i can feel a slight shudder or shake feeling. I'm wondering if this might be worn clutches in the limited slip. Also i'm wondering if anyone other than trans-go makes a shift kit for this truck.
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Joined: Mar 2007
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From: Medina TN
Hotshot
Joined: Jun 2003
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From: SW VA
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Joined: Mar 2007
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I have the same issue with mine ('02 F150 5.4 FX4) and replaced the rear diff fluid + friction modifier (4 oz. added) yesterday. It looks like a number of people have had the problem remedied with the fluid/modifier change.
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
Cargo Master
Joined: Dec 2006
Posts: 3,489
Likes: 45
From: Central NY
Originally Posted by illinibone2003
I have the same issue with mine ('02 F150 5.4 FX4) and replaced the rear diff fluid + friction modifier (4 oz. added) yesterday. It looks like a number of people have had the problem remedied with the fluid/modifier change.
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
Cargo Master
Joined: Dec 2006
Posts: 3,489
Likes: 45
From: Central NY
Originally Posted by sprinklerguy
I have the same problem!
Please elaborate on the fix...or attempt to fix....friction modifier??? Huh?
Thanks
Please elaborate on the fix...or attempt to fix....friction modifier??? Huh?
Thanks
it worked for me and should for you if you don't have any mechanical issues.
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Joined: Aug 2005
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I had the same problem and after I added the 4oz of additive the problem went away and stayed away for about 6 months ab=nd now it's back and only now when I tow my trailer it s sounds like the rear end is going to fall out of the truck.I don't know what it cost to repair the rear end. I might be buy a new truck instead. I like my truck but I had to replace the transmission at 68000 miles and now at 110,000 it looks like I need to have the rear end rebuilt. Maybe I'll look at a different brand next time.
vanman250
vanman250
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Joined: Mar 2007
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On my '02 the filler hole for the rear diff is on the driver's side of the front of the housing... it's a plug with a 3/8" square drive. Depending on how full it's filled, the oil level may be just a little below the filler plug or just even with it. If I recall, the manual says to fill to 1/4" below the fill plug, so there may or may not be space for the 4 oz. of FM.
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Joined: Mar 2007
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Originally Posted by Canadian Screw
had the same problem in my 01 supercrew. changed the fluids and added the friction modifier, unfortunately it didn't cure the problem. had to change the clutch packs, about $ 740.00 cdn.
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Joined: Mar 2007
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Originally Posted by Canadian Screw
had the same problem in my 01 supercrew. changed the fluids and added the friction modifier, unfortunately it didn't cure the problem. had to change the clutch packs, about $ 740.00 cdn.
Same problem here, 2001 SuperCrew 4x4.
Shudder started last Spring while pulling trailer.
I dumped the fluid and added the additive for the limited slip...didn't help or even make a difference, mine only does it once in a while...
hope it's not the clutch packs, does it make a difference if I just let it go?
I don't really need or use the limited slip feature anyway.
Senior User
Joined: May 2004
Posts: 191
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From: San Diego, CA
Originally Posted by illinibone2003
I have the same issue with mine ('02 F150 5.4 FX4) and replaced the rear diff fluid + friction modifier (4 oz. added) yesterday. It looks like a number of people have had the problem remedied with the fluid/modifier change.
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
My question to anyone who has done this is, how long does it take for the new fluid to fix the chatter? I've heard that it takes 100 miles, 200 miles, "X" heating cycles, etc., etc. I've gone 30 mi since yesterday and it seems a lot better, but still rumbles a little on some corners and in reverse (while parking). Anyone know how long I should wait before it's apparent that the new fluid won't do it, and the clutch packs need replacing?
