BMR torque arm and BMR relocation mount clunk
09-01-2016, 04:17 PM
#1
Staging Lane
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BMR torque arm and BMR relocation mount clunk so did an 80e swap on a F-body and bought BMR's adjustable torque arm and transmission cross member with the torque arm relocation mount on it for the 80e. Well i only have 150 miles on the set up since it got changed and now going over bumps and letting on and off the brakes it makes this awful clunk under the car. ive checked bolts and nuts and i cant figure out where its coming from anyone have any ideas? BMR reps have you heard of this before?
09-01-2016, 05:40 PM
#2
Did you use an angle finder to be sure your rear was still angled properly after the switch? U-joints and slip yoke would be the next area to check and make sure there is not a lot of play in them. Also check your transmission fluid is full.
Did you check all the bolts with a torque wrench or just a socket? Sometimes hand tight isn't torqued properly and can lead to it, even if you go 500 lb gorilla on it. Then check bushings for excessive wear. Also your parking brake cable to see if it is loose.
Did you check all the bolts with a torque wrench or just a socket? Sometimes hand tight isn't torqued properly and can lead to it, even if you go 500 lb gorilla on it. Then check bushings for excessive wear. Also your parking brake cable to see if it is loose.
09-02-2016, 06:18 AM
#3
I have the same exact setup (bmr).
I was told by others that its not really a "clunk" but noise to be expected due to tunnel mount (instead of on the transmission) and poly bushings. My angle is -2 (checked with angle finder).
Everything was torqued via torque wrench and my car is fully dynomatted and I can still hear it.
I was told by others that its not really a "clunk" but noise to be expected due to tunnel mount (instead of on the transmission) and poly bushings. My angle is -2 (checked with angle finder).
Everything was torqued via torque wrench and my car is fully dynomatted and I can still hear it.
09-02-2016, 07:44 AM
#4
The relocation set-up shouldn't produce the same "clunk' that is sometimes associated with the Tunnel Mount set-up.
Chances are if everything is tight, the bushing aren't damaged and the torque arm isn't hitting anything like the underbody. there's a good chance it's something else like the panhardbar or lower control arms and the noise is being transmitted through the car more because of the updrade to the torque arm and bushings.
Best thing to do is check everything even if it has nothing to do with the new components.
Craig
Chances are if everything is tight, the bushing aren't damaged and the torque arm isn't hitting anything like the underbody. there's a good chance it's something else like the panhardbar or lower control arms and the noise is being transmitted through the car more because of the updrade to the torque arm and bushings.
Best thing to do is check everything even if it has nothing to do with the new components.
Craig
09-02-2016, 02:34 PM
#5
What rear end do you have? Is it still the stock driveshaft and u-joints? Have you checked your transmission mount?
What I commonly hear with a clunk like this when all the hardware checks out is drivetrain slack being transferred more audibly. When the rear end (especially these stock 10 bolts get some mileage on them) loads and unloads, the slop in the gearset and u-joints can be made apparent. Get the car in the air and grab the driveshaft and check for excessive movement in the u-joints or pinion
What I commonly hear with a clunk like this when all the hardware checks out is drivetrain slack being transferred more audibly. When the rear end (especially these stock 10 bolts get some mileage on them) loads and unloads, the slop in the gearset and u-joints can be made apparent. Get the car in the air and grab the driveshaft and check for excessive movement in the u-joints or pinion
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Glenn ***
Sales Tech
www.bmrsuspension.com
813.986.9302
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Glenn ***
Sales Tech
www.bmrsuspension.com
813.986.9302
Find a Quality alignment shop near you!
09-03-2016, 05:49 AM
#6
Possibly the front of your torque arm is sitting lower than it was previously depending on which adjustment hole you used, and it's hitting your exhaust or y-pipe. That's what mine did the first time I drove it until I sorted it out.
05-11-2017, 04:44 AM
#7
If it's anything like mine(lowered car) it's hitting the back of the tunnel with the torque arm. Mine does this... when i put my 8.8 in the car i will be hammering the tunnel out to make more clearance for it and doing rubber hose over the bottom coil of the spring to give it some extra height.
