Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
vibration after driveshaft swap
Posted 15 May 2007 - 03:28 PM
the closest ujoint to the transmission was bad, so i replaced both halves of the driveshaft with one with new ujoints. the joints on the replacement driveshaft were all good and moved fine when i installed it and i even greased them since it has new greaseable ujoints on it. this driveshaft ran fine in my last daily driver with no vibrations at all. now it vibrates in my new XT6. the balance weights are still on it.
if it is a balance issue....the front one can't really change how it's mounted, the carrier bearing is what it is. so the rear half is the one i can change. what should i do, i have three options:
swap it around, end over end
unbolt the front (by carrier bearing) and rotate it 180 degrees
unbolt the rear (diff side) and rotate it 180 degrees
Posted 15 May 2007 - 04:29 PM
It really shouldn't matter which end is which, or how the two shafts are "clocked" in relation to one another..they should both be balanced assemblies, mixing & matching shouldn't cause unbalance issues.
You could always try the old hose clamp trick if all else fails..once you figure out which shaft is causing you the grief, put a large screw-type hose clamp (like a radiator hose clamp) on it..tighten the clamp up, take the car for a drive. If the vibes are still there, rotate the clamp 1/4 turn and tighten it up again..keep doing this in smaller increments until the vibration stops or there's a noticable decrease. Like balancing a wheel, only you use the "screw" part of the clamp as a movable weight.
If you can't make it completely disappear with one clamp, add a second clamp..
Posted 15 May 2007 - 04:33 PM
i'll try changing the orientation just because it's easy and check on rust/seating of the flanges while i have it off.
Posted 22 May 2007 - 10:18 AM
drove it with the rear half of the driveshaft removed (in FWD) and no vibration at all, so i'm assuming it's that half that is bad. there are no places around me that balance driveshafts so i'll have to find somewhere in maryland or ship it somewhere to have them check it out.
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users