Second design Switzer fan clutches

[Ken A.]

Joe Lucia or anyone else know the original part #'s used for the other 4 fan clutches used after 67?
Specifically the 68-70 and the 71-74 parts.

[Joe L.]

Re: Second design Switzer fan clutches

Joe Lucia or anyone else know the original part #'s used for the other 4 fan clutches used after 67?
Specifically the 68-70 and the 71-74 parts.

Ken------


If you're only referring to the Sweitzer-manufactured clutches, here are some of the part numbers:

GM #3916139-----68-70 small block without A/C

GM #3937771-----68-70 small block and big block with A/C

GM #3991426-----71-73 small block and big block, with or without A/C

The above are the only Corvette fan clutches of Sweitzer manufacture that I know of that were used in the 1968-74 period. It's possible there were others but these are the only ones I know of. I don't think that any Sweitzer clutches were used for the 1974 model year, although the 3991426 may have been used very early in the model year. However, if there was a Sweitzer used, it would likely have been the GM #343720. I am not sure whether it was an Eaton or a Sweitzer.

[Ken A.]

Re: Second design Switzer fan clutches

Joe, you're the best. Did your info come from AIM manuals or service parts books?

[Ken A.]

Re: Second design Switzer fan clutches

Never mind Joe, everything you have said is verified.

[Joe L.]

Re: Second design Switzer fan clutches

Joe, you're the best. Did your info come from AIM manuals or service parts books?

Ken------

A combination of AIM and P&A catalogs but mostly "other sources".

Addendum: I should have added, there is NO information in either the AIM's or the P&A catalogs as to whether any particular fan clutch is a Sweitzer, Eaton, or Delco.