Transmissions and DrivetrainNeed help with your trans? Problems with your axle?
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With a 3.73:1 axle ratio and stock steel drive shaft (which had been "foamed" by the local Chevy dealer in an effort to reduce drive-train noises...another story for another time), vibration was setting in about 75 mph. I had installed an Energy Suspension trans mount, so first I removed the pre-load plate and things improved. But, still had a buzz that would sometimes get nearly violent, like, get on the brakes right now before something lets go. Installed a used 1LE aluminum drive shaft, still had the same problem; the car would pull to 130 mph but I had to close one eye to keep from seeing double. Took the car to the local drive-line specialist, "Yarman Drive Shafts" in Lancaster, CA. Mike balanced the shaft, with the pinion yoke, and 99% of the vibes are gone (should have done this before installing a used shaft...) I don't know if balancing w/ the yoke is common or not, but it worked very well on my car. I hope this can help others with the cursed vibration probs. (Still may contact Denny's for a new shaft to handle the additional power, but if you're not ready to step up to a new aftermarket shaft, maybe this will help you.)
(should have done this before installing a used shaft...) I don't know if balancing w/ the yoke is common or not, but it worked very well on my car. I hope this can help others with the cursed vibration probs. (Still may contact Denny's for a new shaft to handle the additional power, but if you're not ready to step up to a new aftermarket shaft, maybe this will help you.)
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, Dyno Don's SFC's, LCARB's, Boxed LCA's, KYB struts & shocks... 
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