Judders in 4by
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Joined: Jan 2014
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Judders in 4by
Hey guys
I have a 02 Screw 5.4 triton. When in 2 wheel drive its fine under acceleration but when I put it in 4by it judders under acceleration from side to side. Like when you have strong side wind. It doesnt pull to any side when it does this and doesnt do it in 2 wheel drive. Also it is on the fly 4by but I always park and change it in 'P', I had to drop it back into 2by on the fly and it didnt disconnect till I stopped and repeated the process.
Any ideas??
I have a 02 Screw 5.4 triton. When in 2 wheel drive its fine under acceleration but when I put it in 4by it judders under acceleration from side to side. Like when you have strong side wind. It doesnt pull to any side when it does this and doesnt do it in 2 wheel drive. Also it is on the fly 4by but I always park and change it in 'P', I had to drop it back into 2by on the fly and it didnt disconnect till I stopped and repeated the process.
Any ideas??
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
First thing I would think of are the front tires greatly different in size.
The 'juddering' as you call it is the front wheels alternately grabbing then losing traction.
The front and rear tire diameters 'must' be the same because the drive line has little 'slop' to handle any differences so it leaves tire flex and road bite as the only way there is to handle 'minor' differences.
Anything beyond a certain point you feel as some kind of action.
As the speed goes up the effect gets worse.
Other might be greatly worn front end suspension.
.
Here is an example I experienced not long ago.
As you know the 4x4 switch is out of sight behind the shifter and sometimes get hold of it for the heat control while running along.
At 70 mph I began to feel some small vibration and thought it funny the drive shaft U joints would all of a sudden become stiff.
Come to find it was in 4x4, so here you see, with something not perfectly balanced you can get the effect. Could have be tire balance, sleight tire diameter difference or tire pressure or any combination of these and other possible causes.
Since I don't normally run on the highway at those speeds in 4X4 it's not an issue.
On snow and slippery roads at speeds of 35 to 40 the road surface allows tire slip so the drive line is fine with that and you feel nothing out of the ordinary.
Let us know what you find.
Good luck.
The 'juddering' as you call it is the front wheels alternately grabbing then losing traction.
The front and rear tire diameters 'must' be the same because the drive line has little 'slop' to handle any differences so it leaves tire flex and road bite as the only way there is to handle 'minor' differences.
Anything beyond a certain point you feel as some kind of action.
As the speed goes up the effect gets worse.
Other might be greatly worn front end suspension.
.
Here is an example I experienced not long ago.
As you know the 4x4 switch is out of sight behind the shifter and sometimes get hold of it for the heat control while running along.
At 70 mph I began to feel some small vibration and thought it funny the drive shaft U joints would all of a sudden become stiff.
Come to find it was in 4x4, so here you see, with something not perfectly balanced you can get the effect. Could have be tire balance, sleight tire diameter difference or tire pressure or any combination of these and other possible causes.
Since I don't normally run on the highway at those speeds in 4X4 it's not an issue.
On snow and slippery roads at speeds of 35 to 40 the road surface allows tire slip so the drive line is fine with that and you feel nothing out of the ordinary.
Let us know what you find.
Good luck.
Thread Starter
|
New User
Joined: Jan 2014
Posts: 5
Likes: 0
First thing I would think of are the front tires greatly different in size.
The 'juddering' as you call it is the front wheels alternately grabbing then losing traction.
The front and rear tire diameters 'must' be the same because the drive line has little 'slop' to handle any differences so it leaves tire flex and road bite as the only way there is to handle 'minor' differences.
Anything beyond a certain point you feel as some kind of action.
As the speed goes up the effect gets worse.
Other might be greatly worn front end suspension.
.
Here is an example I experienced not long ago.
As you know the 4x4 switch is out of sight behind the shifter and sometimes get hold of it for the heat control while running along.
At 70 mph I began to feel some small vibration and thought it funny the drive shaft U joints would all of a sudden become stiff.
Come to find it was in 4x4, so here you see, with something not perfectly balanced you can get the effect. Could have be tire balance, sleight tire diameter difference or tire pressure or any combination of these and other possible causes.
Since I don't normally run on the highway at those speeds in 4X4 it's not an issue.
On snow and slippery roads at speeds of 35 to 40 the road surface allows tire slip so the drive line is fine with that and you feel nothing out of the ordinary.
Let us know what you find.
Good luck.
The 'juddering' as you call it is the front wheels alternately grabbing then losing traction.
The front and rear tire diameters 'must' be the same because the drive line has little 'slop' to handle any differences so it leaves tire flex and road bite as the only way there is to handle 'minor' differences.
Anything beyond a certain point you feel as some kind of action.
As the speed goes up the effect gets worse.
Other might be greatly worn front end suspension.
.
Here is an example I experienced not long ago.
As you know the 4x4 switch is out of sight behind the shifter and sometimes get hold of it for the heat control while running along.
At 70 mph I began to feel some small vibration and thought it funny the drive shaft U joints would all of a sudden become stiff.
Come to find it was in 4x4, so here you see, with something not perfectly balanced you can get the effect. Could have be tire balance, sleight tire diameter difference or tire pressure or any combination of these and other possible causes.
Since I don't normally run on the highway at those speeds in 4X4 it's not an issue.
On snow and slippery roads at speeds of 35 to 40 the road surface allows tire slip so the drive line is fine with that and you feel nothing out of the ordinary.
Let us know what you find.
Good luck.
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