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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Wiggle in the driveshaft

  • Thread starter Thread starter COramprat
  • Start date Start date Mar 11, 2007

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
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Mar 11, 2007
#1
  • Mar 11, 2007
  • #1
How much play should I have in my driveshaft? I can rotate it about 1/4 inch side to side and there is a little up and down play, very little. I'm thinking I shouldn't have any up/down at all. Bad u-joint? It's acting a little like it did when the u-joint went out last time but I don't remember having so much rotational play in it.
 

stangman

15 Year Member
Jul 10, 2003
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Mar 11, 2007
#2
  • Mar 11, 2007
  • #2
are you getting vibrations at certain speeds?
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
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Sea of Tranquility
Mar 11, 2007
#3
  • Mar 11, 2007
  • #3
stangman said:
are you getting vibrations at certain speeds?
Click to expand...
Just in 5th right now at around 65-75. After I had it off the ground though it was vibrating in each gear. I pulled the DS off and the rear U joint is fine but the front one has a tiny bit of play in it. I'm going to swap it out and see what happens.
 

stangman

15 Year Member
Jul 10, 2003
2,690
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in a 3 bed, 2 bath
Mar 11, 2007
#4
  • Mar 11, 2007
  • #4
COramprat said:
Just in 5th right now at around 65-75. After I had it off the ground though it was vibrating in each gear. I pulled the DS off and the rear U joint is fine but the front one has a tiny bit of play in it. I'm going to swap it out and see what happens.
Click to expand...


i'd be willing to bet that's it. but i have been wrong before
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
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Mar 11, 2007
#5
  • Mar 11, 2007
  • #5
first thing I would do is drop the shaft and make sure the play is not in the pinion.. you can check that by moving the pinion flange up and down, any play there is bad and you will need pinion bearings and a new crush sleeve

if there is no play there then replace your u-joints.
 

stangman

15 Year Member
Jul 10, 2003
2,690
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in a 3 bed, 2 bath
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#6
  • Mar 11, 2007
  • #6
you sir just scared me. i've been getting vibrations too & i dropped my stuff to take the tranny out (for another reason). so i had to run out & double check that just now too, haha


i'm good to go
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
7
89
the people's republic of massachusetts
Mar 11, 2007
#7
  • Mar 11, 2007
  • #7
stangman said:
you sir just scared me. i've been getting vibrations too & i dropped my stuff to take the tranny out (for another reason). so i had to run out & double check that just now too, haha


i'm good to go
Click to expand...

it's also possible to get a vibration after you dropped the driveshaft if you did not index the shaft.. it should always be installed the same way it came out.
 

stangman

15 Year Member
Jul 10, 2003
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in a 3 bed, 2 bath
Mar 11, 2007
#8
  • Mar 11, 2007
  • #8
svttech76 said:
it's also possible to get a vibration after you dropped the driveshaft if you did not index the shaft.. it should always be installed the same way it came out.
Click to expand...

that i can say for sure was done. all the stock oil markings were still there & they all lined up
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Mar 11, 2007
#9
  • Mar 11, 2007
  • #9
svttech76 said:
first thing I would do is drop the shaft and make sure the play is not in the pinion.. you can check that by moving the pinion flange up and down, any play there is bad and you will need pinion bearings and a new crush sleeve

if there is no play there then replace your u-joints.
Click to expand...
I swapped the fwd u-joint since that was the one I was getting the play in. Put it all back together...no change. The pinion moves rotationally with some slack...like and inch around until the wheels move. No up/down, side to side at all.


svttech76 said:
it's also possible to get a vibration after you dropped the driveshaft if you did not index the shaft.. it should always be installed the same way it came out.
Click to expand...
I swapped the old DS for an aluminum one a while back. I just plopped it in because I didn't have good info on how to put in the new one. I dropped the shaft again during my clutch swap...maybe I didn't get it back in the way I had it. I think I'll rotate it 180 and see if that helps.
 
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