This is topic Vibration at freeway speeds in forum Tech Talk at Northern California Ford Owners  .


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Posted by 4.6 STANG (Member # 9378) on :
 
Hey guys, bought a '97 Cobra. Has a MMR 900 trans and MMR RBT700 clutch with Strange 31 spline axles and 4.56 gears. I believe it has an aftermarket driveshaft as well. Speedometer is off but around 75MPH there is a vibration. Now my pinion seal is gone and it's leaking gear oil. I was going to take the driveshaft out and get it balanced unless y'all have a better idea! Any suggestions are welcome! Thanks!
 

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Posted by stangfanatic87 (Member # 12819) on :
 
Balance driveshaft first. Take care of leak also
 

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Posted by Arch (Member # 5177) on :
 
Take it to a tire shop and have the tires balanced. My car shook bad at 80 mph+, didn't matter what gear. New rear tires + 4 wheel balance and its gone.
 

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Posted by SLOWSN95 (Member # 8269) on :
 
Check simple stuff first. See if the driveshaft is tight, check u joints, and then balance tires, etc

[ 2013-05-26, 02:55 AM: Message edited by: SLOWSN95 ]
 

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Posted by triple b (Member # 8763) on :
 
If your tail shaft seal on the trans is leaking your driveshaft is out of balance which is making the hole bigger and your fluid to leak out. New seal and a balance drive shaft with new u joints and your fixed
 

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