Alpha one upper gearcase

dan2744

Petty Officer 1st Class
Joined
Sep 3, 2014
Messages
337
Is the upper gear case on an alpha one tbe same on 4.3 and 5.7?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
The case yes. The gears themselves, no, different ratio. The 4.3 runs either a 1.62 or a 1.84 and the 5.7 runs a 1.47 reduction.

Chris......
 

dan2744

Petty Officer 1st Class
Joined
Sep 3, 2014
Messages
337
Thanks for the response. I'm familiar with the lower gear box but wasnt sure if the upper had the same ratio or not. I may just try to rebuild one of my 2 bad ones. One froze from sitting, the other seized from water.
 
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