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**4x41971SWB** · 02-23-2021, 11:22 AM

Thank you, those pictures are from my 72 blazer with a stock Th350.
I'm putting the crate engine and a over drive transmission in my other blazer.
I was wanting to use the 4l70E but not sure yet.
To answer your question no the rear drive shaft doesn't need it. It is used if the correct drive line angle if it cannot be achieved. To eliminate vibration.

02-23-2021, 11:22 AM	#49
4x41971SWB Senior Member Join Date: May 2016 Location: Escondido CA Posts: 573	Re: '69K10, Build/Help Thank you, those pictures are from my 72 blazer with a stock Th350. I'm putting the crate engine and a over drive transmission in my other blazer. I was wanting to use the 4l70E but not sure yet. To answer your question no the rear drive shaft doesn't need it. It is used if the correct drive line angle if it cannot be achieved. To eliminate vibration.