I recently had my '69 Z/28 transmission (M20) rebuilt by a very reputable Camaro expert. He recommended I use a needle type pilot bearing (GM Part # 14061685) instead of a solid bearing.
In doing some research on the web, I came across the following statement:
"GM has changed their part numbers several times and are currently referring to the bearing (part #14061685) to be used. We strongly suggest NOT using this bearing as it is a needle type bearing designed for 6.2L diesel trucks which have a limit of only 4,000-4,500 rpms. You can imagine how fast those little needles will turn at over 7,000 rpms. We have seen some failures which were quite interesting. The ideal bushing replacement is a bronze type with three grooves (or flutes) spiraled inside and is available under the GM part number 10125896."
So, I have conflicting recommendations. Can anyone shed some light?