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Aftermarket Torque arm users.....

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  • Aftermarket Torque arm users.....

    Going to be getting an adjustable torque arm...probably UMI when I get my new rear end. So the question is.....trans mounted or chassis mounted. They say you get alot of road noise/vibration with the chassis mounted one, which is not cool for my car cause it spends 99.9% of it's time on the street. Anyone here running a quiet chassis mounted torque arm?
    sigpic
    Turbo Charged LS1/T56


  • #2
    Decoupled torque arm James, you know you want to.

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    • #3
      Originally posted by MattODoom View Post
      Decoupled torque arm James, you know you want to.
      No I don't.
      sigpic
      Turbo Charged LS1/T56

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      • #4
        Originally posted by WMCCjames View Post
        Going to be getting an adjustable torque arm...probably UMI when I get my new rear end. So the question is.....trans mounted or chassis mounted. They say you get alot of road noise/vibration with the chassis mounted one, which is not cool for my car cause it spends 99.9% of it's time on the street. Anyone here running a quiet chassis mounted torque arm?
        I don't know anyone using an aftermarket unit on a 3rd gen but I've heard the same thing about road noise with a chassis mounted unit.

        1999 Pontiac Trans Am - LS1 - M6 - ITSSLOW - 12.998@109.59 - SOLD
        1994 Chevrolet Camaro
        - 3.4L - M5 - ITSSLWR - 16.558@85.38
        2003 Chevrolet Blazer
        2005 Yamaha R6
        2001 Yamaha YZ426F

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        • #5
          3rd and 4thgen's are the same unit.
          sigpic
          Turbo Charged LS1/T56

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          • #6
            Originally posted by WMCCjames View Post
            3rd and 4thgen's are the same unit.
            Oh.... I know a few guys running aftermarket TAs on 4th gens and all are UMI pieces. Haven't heard anyone ***** about them yet.

            1999 Pontiac Trans Am - LS1 - M6 - ITSSLOW - 12.998@109.59 - SOLD
            1994 Chevrolet Camaro
            - 3.4L - M5 - ITSSLWR - 16.558@85.38
            2003 Chevrolet Blazer
            2005 Yamaha R6
            2001 Yamaha YZ426F

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            • #7
              depends on what you want to do. A short arm(chassis) will hook much better. If you drive, roadrace or X cross get a full length. A short arm can and will cause wheel hop under severe braking but it the best way to go for drag racing

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              • #8
                This is a pretty cool site: http://www.xse.com/leres/ss/t-arm.html

                Somewhere in there I've read he was getting a clunk when he had the chassis mounted T-Arm installed.

                If a trans. mounted T-Arm is good enough for Phase III GMMG Camaros, I'd feel safe using one with my little motor.
                sigpic

                88' Trans Am 350 TPI




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                • #9
                  well i used to have a BMR trans mount TA, it was pretty loud with the road noise...i now have a chassis mount S and W piece and i think it's quieter. i don't think either one or the other is all that much different though
                  1998 Camaro SS Bullseye Turbo
                  2002 F-250 7.3 Leveled on 20s with 35's
                  2006 Yamaha R6 50th Anniversary
                  http://www.mifbody.com/vbulletin/sho...-Update/page11

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                  • #10
                    Originally posted by SS4Matt View Post
                    well i used to have a BMR trans mount TA, it was pretty loud with the road noise...i now have a chassis mount S and W piece and i think it's quieter. i don't think either one or the other is all that much different though
                    thats interesting... im wondering if chasis mount noise is as mythical as poly trans mounts causing vibration - if anything my car has less vibration after switching from a brand new LS1 mount. Ive not felt one vibration yet.
                    -Joel
                    1995 Z28 M6 - AI226/234 - autocross ricer
                    1984 Scottsdale K10 - 305/4bbl/4spd


                    WTB List:Midwest Chasis DS Loop

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                    • #11
                      Yeah, I will definately be using a full length arm no matter what. Short arms are not for me. I am most likey doing a trans mount design, they say you don't really have to worry about breaking the tailshaft until your 60ft's get down into the 1.5 range.

                      I was set on UMI but I looked at the BMR arm and like it a little better due to the snout design.
                      sigpic
                      Turbo Charged LS1/T56

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                      • #12
                        I run a spohn chassis mount arm on my 97. I have a chromoly rod end and does have some noise when beating on the car but I think it is due to the chromoly end.
                        67 Coupe Corn fed 502BBC 4L80E 371WHP/367FT lbs torque
                        70 Pontiac Lemans Vert, GTO clone, 427BBC and 7000R4

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                        • #13
                          yeah ive got the chassis mounted one as well, it doesnt seem very loud to me at all. It would clunk and i had vibes initially, but i needed to tune in the angles a bit

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                          • #14
                            For vehicle dynamics sake, get the long one!!

                            Also, something to think about is to have a round tube as the end and insert a grease fitting. This will allow it to twist in the bushing as the car rolls. If you just have a poly mount it wont allow the torque arm to slip and this will put a bending/twisting load on the torque arm

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                            • #15
                              Originally posted by DanO View Post
                              For vehicle dynamics sake, get the long one!!

                              Also, something to think about is to have a round tube as the end and insert a grease fitting. This will allow it to twist in the bushing as the car rolls. If you just have a poly mount it wont allow the torque arm to slip and this will put a bending/twisting load on the torque arm
                              I have a BMR T.A. and it came with a big tube of synthetic grease for such an application. I've had it out a couple times since I installed it and the gease is still there so I think a fitting would be over-kill.
                              sigpic

                              88' Trans Am 350 TPI




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