Just replaced my tranny mount but still feel knocking under the car..
06-19-2011, 08:01 PM
#1
On The Tree
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Just replaced my tranny mount but still feel knocking under the car.. Either I broke another mount in 1day or there's somthing else banging under there.. Is there any thing that will cause a knocking feeling under the car at the beginning of a take off?
06-19-2011, 08:32 PM
#2
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What are your mods?
I've got dumped duals and sometimes those mounts will come loose from vibrations. When that happens I'll get a good bang under the car until I tighten it back up.
Check anything that could possibly come loose and be affected by the engine torquing.
I've got dumped duals and sometimes those mounts will come loose from vibrations. When that happens I'll get a good bang under the car until I tighten it back up.
Check anything that could possibly come loose and be affected by the engine torquing.
06-19-2011, 08:43 PM
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Launching!
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check your tranny mount again... my car kept breaking them almost every time i launched more than 1/4 throttle. fixed it by installing a torque arm relocation crossmember. still have no idea to this day (2 years later) why i had such a bad problem with tranny mounts
06-19-2011, 09:16 PM
#6
exhaust has been known to cause some knockin too. ive had it hitting on underside of car during take off mostly. the motor would move and exhaust would move that slight bit and it would bang.
especially aftermarket headers and some custom exhaust if you have it could do it
especially aftermarket headers and some custom exhaust if you have it could do it
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06-20-2011, 10:06 AM
#8
I'd stop wasting your time with the rubber factory style trans mounts you probably broke the POS again; just get a poly trans mount....went through 3-4 of the rubber ones over the years before I wised up and got Energy suspension poly mount; HUGE difference from the factory and they only cost $30, the shifter no longer moves left to right when you get on it making shifting with the 6 spd much easier/more positive. You get slightly more road vibration but you can beat the hell out of your car without worrying about breaking a trans mount and no "flex" at all from it. It pays for it's self after you stop replacing the factory POS constantly.
06-20-2011, 11:17 AM
#9
The bolts that hold your torque arm to the differential can be loose enough to cause clunking when goin from deceleration to acceleration and vise versa.
The clam that holds the bushing can be loose.
The tranny mount nut can back off/come loose.
The four Tranny crossmember bolts can back out.
Just some things to check while you're under there.
I use loctite on all the above now.
The clam that holds the bushing can be loose.
The tranny mount nut can back off/come loose.
The four Tranny crossmember bolts can back out.
Just some things to check while you're under there.
I use loctite on all the above now.
06-20-2011, 11:54 AM
#12
Check motor mounts. I checked mine by puting e brake on in drive, then give throttle from under the hood. My engine looked like it wanted to jump out of the engine bay. Its safer to have a buddy foot brake the car though.
Then replace your trans mount. If you keep going through trans mounts then your motor mounts are probably shot.
I also replaced my torque arm bushing just to make sure. The stock one looked fine but might as well right?
Advice to you...get poly motor mounts but stay rubber on your trans mount. If you search enough like I did you will find theres quite a few horror stories because the poly trans mount dosent give like the stock rubber. Sure there are a few guys on here who say they never had a problem but just do a search and you will see what I mean.
Im happy with my poly motor mounts, stock rubber trans mount, and stock rubber torgue arm bushing.
Then replace your trans mount. If you keep going through trans mounts then your motor mounts are probably shot.
I also replaced my torque arm bushing just to make sure. The stock one looked fine but might as well right?
Advice to you...get poly motor mounts but stay rubber on your trans mount. If you search enough like I did you will find theres quite a few horror stories because the poly trans mount dosent give like the stock rubber. Sure there are a few guys on here who say they never had a problem but just do a search and you will see what I mean.
Im happy with my poly motor mounts, stock rubber trans mount, and stock rubber torgue arm bushing.
06-20-2011, 12:14 PM
#13
^This....If you've been driving around with busted trans mount there's a good possibility motor mounts are shot too especially if your high mileage or aggressive driver. Forgot to mention I put in poly motor mounts at the same time as the poly trans mount because the rubber was completely broken in half. Don't believe all the hype about poly trans/motor mounts making your car vibrate like hell...it's a performance car not a freaking Cadillac or Lexus.The performance tradeoff is well worth it IMO...I liked my poly trans mount enough in my 94 Formula to put one in my otherwise stock 99 Firehawk too which is my DD and have no regrets or vibration issues.
