50 to 65 mph rumble
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50 to 65 mph rumble
Greetings all!
I have an SA22C with a Weber 45 DCOE and 85' dizzy and RB header with all emissions and AC removed. The car runs real well aside from some standard parts wearing out (namely the rear shocks), everything's pretty tight.
I've noticed that when I get up to 50 to 65 mph, regardless if i'm in 4th or 5th gear, my car seems to rumble, like I driving over very rough road and pushing in the clutch seems to make no change. Any ideas on this? it's fairly annoying as the rest of the car runs good for having over 200k on the body.
Leks
I have an SA22C with a Weber 45 DCOE and 85' dizzy and RB header with all emissions and AC removed. The car runs real well aside from some standard parts wearing out (namely the rear shocks), everything's pretty tight.
I've noticed that when I get up to 50 to 65 mph, regardless if i'm in 4th or 5th gear, my car seems to rumble, like I driving over very rough road and pushing in the clutch seems to make no change. Any ideas on this? it's fairly annoying as the rest of the car runs good for having over 200k on the body.
Leks
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emissions r teh sux
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Checked the rear bearings and driveshaft ujoints? What about tire condition? Is there any way to tell what part of the car its coming from (front or back)? Lots of things can cause this, including bad trans mount
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Seriously: I don't feel any abnormal vibration through the steering wheel OR the pedals. The tires are used but they are a matching set that were professionally mounted and balanced and the breaks are new as well. Should I be starting at the trans and working back? What would a look for when inspecting the drive shaft or the rear diff? I'm not afraid to spend money on my girl and I have an entire parts car with lower body miles to pull parts or compare to if I need. My plan had been to pull the rear end out of the parts car and rebuild it and slide it under Kaiju.
#5
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I would start by swapping in the driveshaft from your parts car and see if it changes the vibration. The driveshaft should be out of the car to check the u-joints. Swivel them back and forth in each direction to see if they move smoothly without play. If that does not change the vibration try the tranny mount next. You might want to replace the mount regardless. They are cheap.
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So far I've swapped out the rear shocks (one of which was completely blown) with a fresh set of KYB's, Then literally I was laid up with the flu THAT night, so I haven't had the chance to test them out yet.
Leks
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I would lean towards the U joints also but if that's not the case make sure you have good fluid in the Differential. If that is low or full of metal dust I have had truck come into the shop with the same symptom and it ended up being the fluid in the rear end.
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life's a drag*)
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Glad to hear you got it fixed, just as a side note what kind of exhaust do you have? Mine is a racing beat single header and rb muffler with no presilincer and I think its too stopped up.
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RB race header (dual outlet) into Y pipe to straight pipe to old-*** stock muffler. It's gonna be true dual exhaust all the way back with side exits.... oh yeah. Still haven't fixed it. How do I know when my diff needs attention and what do I put back in it? LOL I was raised front wheel drive, can you tell?
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