car makes a thud noise

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Feb 18, 2011 | 07:26 PM

draggz28

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From: houston

car makes a thud noise

alright guys came here to ask the pros i was driving my automatic z28 going 20mph and i floor it it, takes off nice but when it shifts i can hear a thud noise under the center council. can yall help

Feb 18, 2011 | 07:29 PM

Crashz28

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From: Reagan

Check your mounts I could listen to it some time let you know more it might also be the torque arm mount!

Feb 18, 2011 | 07:33 PM

draggz28

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From: houston

yea some one told me it might be the transmission mount?? that it would be good to just change it to a poly bushing

Feb 18, 2011 | 07:55 PM

Crashz28

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From: Reagan

Yeah do both tranny and motor mounts at the same time how many miles you got on your car im in Houston also if you need a hand let me know

Feb 18, 2011 | 07:58 PM

draggz28

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From: houston

car has 98xxx

Feb 18, 2011 | 08:07 PM

Crashz28

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From: Reagan

Yeah its about do for all new mounts my buddys 99z28 used to have a pretty good thud when it would shift but it didnt have 2nd gear so the tranny would hit 3rd with a lot of extra rpms after he had his tranny built it still made a pretty loud thud when shifting so it might be a normal thud but either way new mounts defiantly wont hurt anything!

Feb 18, 2011 | 08:12 PM

mcalus

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From: Chelsea, Michigan

I am 99% positive that its your trans mount. Takes minutes to change, cost 10 bucks at local parts store. Just buy a stock rubber one...

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Feb 18, 2011 | 08:38 PM

Greekey

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Dont run a poly transmission mount if your still on stock motor mounts. It can cause problems.

Feb 18, 2011 | 08:41 PM

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Crashz28

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From: Reagan

The poly bushing is stiffer has less flex for a stiffer drivetrain you might get a tad bit more vibrations in the car! I prefer poly bushing over the factory replacements myself

Feb 18, 2011 | 09:03 PM

#11

draggz28

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From: houston

well i dont wanna run a poly bushing if its going to cause problems is that true

Feb 18, 2011 | 09:06 PM

#12

Greekey

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From: Warren, Ohio

Some people get away with it, and some dont. If you have stock rubber motor mounts, it causes your engine to shake back and fourth when giving it throttle. If you have a stiffer mounts on the transmission, your transmission will not want to go anywhere when the engine is moving back and fourth. Some have cracked their bellhousing because of this.