Bent Driveshaft?
09-22-2019, 01:33 PM
#1
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Bent Driveshaft?
Before you comment remember I am an enthusiast like you, trying to figure out wtf is wrong with my car.
2004 6 speed.
Problem: Drivetrain is moving around and shaking car. With the car in the air and suspension jacked up, the car idling in first gear is shaking things around. From the transmission to the diff to the suspension components everything is moving.
What happened: I jacked the car up to install rear P2M upper toe arms and trailing links. I did this to give myself as much negative rear camber as i could get (I believe I have around -8-ish) to fit some wheels under my over fenders. I set the car on the ground and was testing fitment with 2 lug nuts on my wheel hub (I know, in hindsight I'm a dumbass.. lesson learned) and with being excited that i got everything to fit, when I went to drive the car I forgot to put the remaining lug nuts on. (Spare me, please) After realizing what I did (after violent shaking), I jacked it up in the street and torqued the rear wheels down to discover that it didn't fix anything.
Okay so fast forward to where I am right now. The car has been on jack stands for 2 weeks. I have replaced both axles. I replaced both spindles, one hub was obviously bent. I replaced my differential. (all in that order) I am still having a problem where everything is moving around. My only thought is that it could be the driveshaft, but I have no idea how that could possibly be damaged. After posting this I will be pulling it out of my car and updating this.
Other information than may/may not matter: The differential mounts look good, I examined them before putting it in the car and they look solid and nothing is leaking. Oil from both diffs looked fine. One of the old axle boots was blown.
Thank you in advance for any help, I'm truly stumped and cant find anything like this anywhere online.
2004 6 speed.
Problem: Drivetrain is moving around and shaking car. With the car in the air and suspension jacked up, the car idling in first gear is shaking things around. From the transmission to the diff to the suspension components everything is moving.
What happened: I jacked the car up to install rear P2M upper toe arms and trailing links. I did this to give myself as much negative rear camber as i could get (I believe I have around -8-ish) to fit some wheels under my over fenders. I set the car on the ground and was testing fitment with 2 lug nuts on my wheel hub (I know, in hindsight I'm a dumbass.. lesson learned) and with being excited that i got everything to fit, when I went to drive the car I forgot to put the remaining lug nuts on. (Spare me, please) After realizing what I did (after violent shaking), I jacked it up in the street and torqued the rear wheels down to discover that it didn't fix anything.
Okay so fast forward to where I am right now. The car has been on jack stands for 2 weeks. I have replaced both axles. I replaced both spindles, one hub was obviously bent. I replaced my differential. (all in that order) I am still having a problem where everything is moving around. My only thought is that it could be the driveshaft, but I have no idea how that could possibly be damaged. After posting this I will be pulling it out of my car and updating this.
Other information than may/may not matter: The differential mounts look good, I examined them before putting it in the car and they look solid and nothing is leaking. Oil from both diffs looked fine. One of the old axle boots was blown.
Thank you in advance for any help, I'm truly stumped and cant find anything like this anywhere online.
09-22-2019, 04:51 PM
#2
Are all the PPF bolts tight?
It looks to me like the diff is moving side to side....it shouldn't do that if the mounts are intact and the links are tight. -8 camber is functionally useless so in the long run that seems like a strange way to get wheels to fit.
Basically the motor mounts and the diff mounts are what hold the drivetrain in place... the driveshaft won't contribute to that movement. Plus carbon shafts won't bend. They will shatter
It looks to me like the diff is moving side to side....it shouldn't do that if the mounts are intact and the links are tight. -8 camber is functionally useless so in the long run that seems like a strange way to get wheels to fit.
Basically the motor mounts and the diff mounts are what hold the drivetrain in place... the driveshaft won't contribute to that movement. Plus carbon shafts won't bend. They will shatter
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