Mike Puckett
SCCoA Member
Since my wheel bearings are 20 years old and are a bit noisy above 110mph I decided to swap out my rear halfshaft and knuckle assemblies with some much newer ones. The newest set that I have came out of a 94 SC automatic and both halfshafts are the smaller diameter shaft. I also have a set of 5 spd halfshafts that have the fat diameter shaft for the passenger side but are older with more miles on them. I'm also going to be building another motor that'll give me around 400hp at the wheels. I understand that the fat shaft is for reducing wheel hop and not strength. Is there, then, any real reason not to use the smaller shaft instead since it's a lot newer and is lighter than the fat shaft? Or would I be better off to use the fat shaft anyway.