New Midwest Chassis TQ arm and vibration issue
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I just installed a Midwest Chassis TQ arm with the true dual tunnel mount on a 2001 Trans Am. I Also installed an S60 rearend and chromoly driveshaft. The car is a 6 speed and now has a pretty good vibration from about 65 mph up really noticeable at 70. I set the Pinion angle with the drive shaft down 1 degree and with the pinion down 1 degree which should put it right about -2. I set it properly with the weight on the tires. The rear of my car sits at about 28" the front sits about 27". Do you guys think this is an issue with the drive shaft or do I have my pinion angle jacked up some how?
Last edited by bigfatls6; 02-12-2017 at 07:13 PM.
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I just installed a Midwest Chassis TQ arm with the true dual tunnel mount on a 2001 Trans Am. I Also installed an S60 rearend and chromoly driveshaft. The car is a 6 speed and now has a pretty good vibration from about 65 mph up really noticeable at 70. I set the Pinion angle with the drive shaft down 1 degree and with the pinion down 1 degree which should put it right about -2. I set it properly with the weight on the tires. The rear of my car sits at about 28" the front sits about 27". Do you guys think this is an issue with the drive shaft or do I have my pinion angle jacked up some how?
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Driveshaft is used and came from a local shop here in Houston. I'm probably fixing to pull it out and possibly take it and have them check the balance on it again.
I also have the TQ arm installed on the lower hole of the two mounting points on the tunnel mount
I also have the TQ arm installed on the lower hole of the two mounting points on the tunnel mount
Last edited by bigfatls6; 02-13-2017 at 02:13 PM.
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He talking about your front yoke that goes into the transmission. The inner splines aren't cut right on some of those forged yokes and they have too much movement on the splines causing vibration.
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A couple options for a new driveshaft. Keep in mind we are the only ones that offer this yoke knowing of other issues from multiple different yokes on the market when using a T-56 transmission.
3" Steel
Strange 3" C/M Driveshaft
3.5 Aluminum
Purchase the Yoke separate
3" Steel
Strange 3" C/M Driveshaft
3.5 Aluminum
Purchase the Yoke separate
Last edited by MidwestChassis2; 02-14-2017 at 10:00 AM.
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I talked with the guy today that I got the S60 rearend and driveshaft from and I was wrong the shaft is actually a strange chromoly that was purchased with the S60 the local driveshaft shop actually only checked the balance on it due to an issue with loosing a plastic piece located under the cap on one of the ujoints. I also installed my racestar wheels today and it actually got rid of most of the vibration. Weird deal I've never felt a tire balance issue feel like this vibration. Now I just need to get rid of the clunking from the Tq Arm.
What are the Recomendeed TQ specs for the TQ arm bracket to the rear end and the TQ arm attachment at the tunnel mount?
What are the Recomendeed TQ specs for the TQ arm bracket to the rear end and the TQ arm attachment at the tunnel mount?
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You would torque the bolts that attach the torque arm bracket to the housing back to factory specs and as far as a grade eight 1/2 bolt they have a torque range between 80- and 90.
You have an aftermarket torque arm and a manual transmission, it will react every time you get on and off the gas differently than an automatic will.
You have an aftermarket torque arm and a manual transmission, it will react every time you get on and off the gas differently than an automatic will.