Generation ?? ALPHA1

[SuperWrench0166]

how do you determine gen 1 or 2

[CAHotRodBoy]

H2O pumps are different. Gen 1 up to '91 (I think).

[77charger]

Originally posted by SuperWrench0166
how do you determine gen 1 or 2 I think the gen 2 has bolts that connect the upper and lower unit (you can see the nuts too) main difference,Another on the gen 2it has the grease fitting for the gimble bearing on the right side of the drive instead of on top of the housing.
The gen 1 uses studs instead

[Bondo]

Mod.1 is up to 1983.........
Gen.1 is from 84 to 93.........
Gen.II is 93 to present............

[captainauti]

actually... all alphas, and #1's had the grease fitting in the side for the gimble bearing. tge old 470 and so forths withthe sealed bearing didnt.they were early to mid 70's. the alpha gen 2 started transition in 91, and finished in 92. the gen 2 has a stainless pump housing, and a high volume pump. the std. alpha and earlier have a lower volume pump.gen 2 also have the oil res. on the engine (started in 92). also the gen 2 has a deeper upper case to allow the water to cool the back of the upper gear set. and yes, the gen 2 is through bolted together, not sudded like the std. alpha.