Knocking sound on acceleration, STFA comes up with prop shaft cv joint.
10-20-2008, 12:51 PM
#1
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Knocking sound on acceleration, STFA comes up with prop shaft cv joint.
or the support bushing for the driveshaft/prop shaft.
under brisk acceleration it sounds like i'm rolling with a flat tire. if i cruise the car seems normal. I'm going to get under it tonight and take a look, but i guess i'm asking is could this also be caused by bad trans mounts and or diff mount?
Also if it is something with the prop shaft, should i immediately stop driving this car till i can get a new one installed? Since the problem only surfaces during hard acceleration, i'm thinking it's not to horrible.
under brisk acceleration it sounds like i'm rolling with a flat tire. if i cruise the car seems normal. I'm going to get under it tonight and take a look, but i guess i'm asking is could this also be caused by bad trans mounts and or diff mount?
Also if it is something with the prop shaft, should i immediately stop driving this car till i can get a new one installed? Since the problem only surfaces during hard acceleration, i'm thinking it's not to horrible.
10-20-2008, 02:15 PM
#3
Does the steering wheel shimmy during said sound, can you feel it in the body or steering?
I've seen CVs/axles go bad, where you will get a significant speed-dependent wobble and the steering wheel goes apesh*t. If you have a knocking and it seems like it's to the bottom of the seat, I'd say the mainshaft center joint likely crapped out.
Like Rodge said, climb under and wiggle/torque things...if you're talking knocking, that scares me...drive easy til then.
Like Rodge said, climb under and wiggle/torque things...if you're talking knocking, that scares me...drive easy til then.
10-20-2008, 02:41 PM
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yeah just got under and noticed that the driverside axle where it connects to the diff is wet
I think i may have been a decent leak for a long time so now the fluid level is low in the diff. I am going to pull the exhaust here in a bit so i can get the driveshaft and take a look at it. The feeling is definetly in the body, steering is fine, honestly it sounds like the rear tires went from round to square when it happens.
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10-21-2008, 08:58 AM
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Fill plug for the transmission is drivers side at 10 o'clock compared to the left axle.
For the rear diff its on the passenger side, also around 10 o'clock compared to the right axle.
10-21-2008, 10:11 AM
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danke, i found it but i dont have the right tools to get it out, so i'm conceeding
got an appointment on Thursday At CCC so i'll just take it there and let them deal with it.
I know i know, we have a good group in MA but due to a ton of things i would rather just take it there cause of life circumstances.
Thanks for your help roger i really do appreciate it.
I know i know, we have a good group in MA but due to a ton of things i would rather just take it there cause of life circumstances.
Thanks for your help roger i really do appreciate it.