The 716156GM is a custom pilot bushing for adapting AMC engines to transmissions with a .59” pilot tip. The bushing is normally supplied in several of our adapter kits including our AMC to Chevy bellhousings. The pilot bushing is also commonly purchased separately for a conversion like an AX15 or T5 where the factory OEM pilot bushing does not fit some AMC cranks.
Advance Adapters designed this special pilot bushing to solve the issue. The pilot bushing is manufactured of a special bronze oilite material. It is essentially a bronze alloy material that has be penetrated with oil. The bushing essentially has “pores” where oil can permeate throughout the bushing keeping the bushing properly lubricated for the transmission input shaft.
The dimensions of the 716156GM pilot bushing are:
O.D X I.D. X LENGTH
1.818” X .59” X .50”
The O.D. dimension of the 716156GM is clearly not the approximate 1” pilot crank diameter used by most AMC cranks. The larger 1.818”outside diameter is completely intentional. Since there have been numerous variations in AMC cranks over the years coupled with the introduction of “crank sleeves” used on some inline 6 applications, we have chose to use the outer diameter portion of the AMC crank. This outer step is an area on AMC cranks that is almost always uniform on AMC blocks over a 30 year period. By using this outer step, the variations of the inner crank do not have any factor to the fitment of the bushing.
Advance Adapters conversion kits that include this pilot bushing include: PN712568, PN712569, PN712570, and PN712571
