ZR-1 Net Registry Forums - View Single Post - Transmission noise

Marc Haibeck · 06-09-2018

I suggest that you should not use the plain or fluted bronze pilot bearing. We have had problems with them spinning in the crankshaft shortly after installation. I recommend the roller pilot bearing. AC-Delco pn CT1078.

It's interesting to note that GM issued a service bulletin in about 1995 recommending the fluted pilot bearing. Then about nine months later the service bulletin was revised for the roller bearing. That was their final recommendation.

06-09-2018	#22
Marc Haibeck Join Date: May 2007 Location: Addison IL Posts: 255	Re: Transmission noise - DualMass or Throwout? I suggest that you should not use the plain or fluted bronze pilot bearing. We have had problems with them spinning in the crankshaft shortly after installation. I recommend the roller pilot bearing. AC-Delco pn CT1078. It's interesting to note that GM issued a service bulletin in about 1995 recommending the fluted pilot bearing. Then about nine months later the service bulletin was revised for the roller bearing. That was their final recommendation.