Shudder???
Thread Starter
|
New User
Joined: Mar 2006
Posts: 11
Likes: 0
Shudder???
Have been looking all morning for someone that has my problem (Not found). I have a 1999 F-150 4X4 that experiences a very quick lite shudder. It feels like the infamous torque convrter shudder, but this only does it when turning out onto a highway at a 4 way stop. If the wheels are straight it hardly ever does it. but if the wheels are turned and going up a small incline pulling out onto a road it will last longer may 2 seconds.
Please help
Please help
Senior User
Joined: May 2004
Posts: 191
Likes: 0
From: San Diego, CA
There is a metal tag on one or the bolts on the back of the rear differential. It will have numbers stamped on it. On your 4x4 it will have "3.55 975" if it is non-limited slip. It will have "3L55 975" if it is limited slip (look for the "L"). The shudder or chatter you are feeling when accelerating and turning from a stop is most likely from the clutches that are in the "limited slip" option. I drained my diff by removing the back cover then replaced the fluid with Mobile1 Full Synthetic 75W140 and don't forget to add a 4oz bottle of Motocraft Friction Modifier. That ended the chatter at 70,000mi but now at 95,000mi it is starting again so this time I might need a new clutch pack 
Good Luck with yours.
Fasterhorses
Good Luck with yours.Fasterhorses
Junior User
Joined: Jan 2005
Posts: 92
Likes: 2
From: Black Hills, SD
Fordtruckman 11,
If you think it is your torque convertor giving you the shudder you might try Dr. Trannys Shudder Fix. It is made by Lubegard. Great stuff. My 98 F150 was shuddering and I put a tube of this stuff in it and the shudder is gone and the tranny shifts much better. I just had the transmission serviced a couple months ago and the shudder seemed to get worse. I got mine through EBay.
Jim
If you think it is your torque convertor giving you the shudder you might try Dr. Trannys Shudder Fix. It is made by Lubegard. Great stuff. My 98 F150 was shuddering and I put a tube of this stuff in it and the shudder is gone and the tranny shifts much better. I just had the transmission serviced a couple months ago and the shudder seemed to get worse. I got mine through EBay.
Jim
New User
Joined: May 2005
Posts: 18
Likes: 0
It is your rear end. Mine does the same thing. The limited slip is just engaging, which isn't necesarrily a good thing. I just live with mine and hope it lasts.
Trending Topics
Thread Starter
|
New User
Joined: Mar 2006
Posts: 11
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Posting Guru
Joined: Jul 2005
Posts: 1,940
Likes: 0
Friction modifier will fix a LS axle shudder (did for me anyways), as for pouring lucas in yer tranny, my advise is to flush it out, it killed the tranny in my old truck, most modern ford trannies auto and manual alike only should be fillled with mercon fluid and nothing else.
Thread
Thread Starter
Forum
Replies
Last Post
geodody
1997 - 2006 Expedition & Navigator
19
Jan 28, 2013 05:03 PM