LS1 Gurus need to solve this issue
LS1 Gurus need to solve this issue I feel like a groaning noise when I go from a stop to wot but driving normally or not putting a lot of load on the car it drives perfect?
UPDATE: vibration/grinding feels around the floorboard of the car, went to a shop and had the car on a lift with me on, if i put the car in neutral and reved couldnt hear anything, if i put the car in drive and gave it gas i could feel hear the vibration around the tranny area or somewhere around the gas pedal??
Any comments appreciated
UPDATE: vibration/grinding feels around the floorboard of the car, went to a shop and had the car on a lift with me on, if i put the car in neutral and reved couldnt hear anything, if i put the car in drive and gave it gas i could feel hear the vibration around the tranny area or somewhere around the gas pedal??
Any comments appreciated
Last edited by needtransam; Jan 31, 2012 at 04:06 PM.
Firstly, this question belongs in the gears & axles section, not the external engine section.
Second, you posted the same stuff in the wrong section twice. This might **** people off.
Third, as you stated in the other thread "i have really loose breaks like the brake pedal goes all the way in and no brakes" STOP DRIVING THIS CAR IMMEDIATELY.
It appears to me that you damaged something during your curb hit and using the axle that took the hit wasn't such a great idea. I'm curious-why did you use the old axle instead of the axle that came in the replacement rear?
As the cause of the problem is being difficult to find, I would suggest you find a shop and have them diagnose the issue. Pay for it, get it in writing and also get a written estimate for the repair. You'll then have a choice-fix it yourself or pay them to do it.
AND FIX THEM BRAKES!
Second, you posted the same stuff in the wrong section twice. This might **** people off.
Third, as you stated in the other thread "i have really loose breaks like the brake pedal goes all the way in and no brakes" STOP DRIVING THIS CAR IMMEDIATELY.
It appears to me that you damaged something during your curb hit and using the axle that took the hit wasn't such a great idea. I'm curious-why did you use the old axle instead of the axle that came in the replacement rear?
As the cause of the problem is being difficult to find, I would suggest you find a shop and have them diagnose the issue. Pay for it, get it in writing and also get a written estimate for the repair. You'll then have a choice-fix it yourself or pay them to do it.
AND FIX THEM BRAKES!
first brakes are fixed, second i posted on this section since its the most active and this problem may apply on the external section as I state that i dont think its the axel anymore, third i used the same axels since it had better screws and was/looked pretty clean compared to the one I got
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Check motor mounts and check to see if your Y-pipe is hitting the floor boards somehwere. When the engine is under load it rocks over more than just revving it in the DW in neutral.
Have someone look under the hood with a flashlight while you gently power brake it in the driveway. Look around the bellhousing area, exhaust area and see how much the engine torques over.
Have someone look under the hood with a flashlight while you gently power brake it in the driveway. Look around the bellhousing area, exhaust area and see how much the engine torques over.
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Verdad Gallardo Check motor mounts and check to see if your Y-pipe is hitting the floor boards somehwere. When the engine is under load it rocks over more than just revving it in the DW in neutral.
Have someone look under the hood with a flashlight while you gently power brake it in the driveway. Look around the bellhousing area, exhaust area and see how much the engine torques over.
Have someone look under the hood with a flashlight while you gently power brake it in the driveway. Look around the bellhousing area, exhaust area and see how much the engine torques over.
I actually was thinking my motor mount but would they make like a grinding growling noise? y pipe and everything seems really solid i just got back from welding all the pipe and seems its not exhaust related, im thinking either motor mounts, something with tranny area, what can the bellhousing do to make this noise?? something with driveshaft but it doesnt seem its hitting anything??
And you can clearly hear the sound when I floor the car, and its constantly their until i left off the throttle?
TECH Enthusiast
Joined: May 2011
Posts: 506
Likes: 0
From: Catoosa oklahoma
I had a noise I couldn't figure after I clipped a tree. It was grinding every time the car was under load turned out it was the sway bar rubbing on the a/c compressor I bent the sway bar
I can't say what may or may not have happened when you had an accident.
On our cars when there is a grind/rattle/knock/vibration under throttle it almost always ends up being that the driver side of the y pipe is hitting the body of the car because the motor mounts are weak and or worn out. Check your y pipe clearance between the body and the pipe under the driver seat area.
Like posted above in slightly different wording, put it drive, foot firmly on brake, give it some gas and see if the pipe is hitting the floor.
On our cars when there is a grind/rattle/knock/vibration under throttle it almost always ends up being that the driver side of the y pipe is hitting the body of the car because the motor mounts are weak and or worn out. Check your y pipe clearance between the body and the pipe under the driver seat area.
Like posted above in slightly different wording, put it drive, foot firmly on brake, give it some gas and see if the pipe is hitting the floor.
I can't say what may or may not have happened when you had an accident.
On our cars when there is a grind/rattle/knock/vibration under throttle it almost always ends up being that the driver side of the y pipe is hitting the body of the car because the motor mounts are weak and or worn out. Check your y pipe clearance between the body and the pipe under the driver seat area.
Like posted above in slightly different wording, put it drive, foot firmly on brake, give it some gas and see if the pipe is hitting the floor.
On our cars when there is a grind/rattle/knock/vibration under throttle it almost always ends up being that the driver side of the y pipe is hitting the body of the car because the motor mounts are weak and or worn out. Check your y pipe clearance between the body and the pipe under the driver seat area.
Like posted above in slightly different wording, put it drive, foot firmly on brake, give it some gas and see if the pipe is hitting the floor.
Ok, it may indeed could still be the y pipe so I won't rule it out, and ill check the driveshaft, do both sides of the driveshaft use unis? since i swaped my rear the one that connects to it seemes good (but im not sure what bad looks like?) and never checked the one that connects to the tranny?
TECH Fanatic
Joined: Aug 2004
Posts: 1,373
Likes: 4
From: Auckland, Nth Is, New Zealand.
Ok, it may indeed could still be the y pipe so I won't rule it out, and ill check the driveshaft, do both sides of the driveshaft use unis? since i swaped my rear the one that connects to it seemes good (but im not sure what bad looks like?) and never checked the one that connects to the tranny?
They become dry inside & the needle rollers give out with no grease making the uni sloppy which then makes the drive shaft out of balance. If you've owned the car for a number of years & they don't look like they've ever been replace, do them,. Nothing like a uni breaking when you're dropping the clutch.
Something similar happend to me, (noise wise) and it ended up being the torque arm was loose. It caused a noise while driving. I took the impact to it and problem solved. May not be your problem, just an option you might check out.
My Jet-Hot Y-pipe would rub the frame just a little. That area is right near your feet. Hooker/Jet-Hot/Pacesetter are very close in design. I doubt it would happen on the lift as the tires are way to easy to move compared to being loaded.