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Mack etec crankshaft in older e7


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Hey guys I'm working on a 1996 Mack CH-613 with a E-7/350, long story short it needs a crankshaft so I picked one up local in great shape it came out of a 1999 Mack CH with a

E-Tech/350. It's a used take out but it's in good condition, I have swapped over the gear from the old crank to the new one and all the journals are the same thickness, dimensions are the same....

The problem, the crank is very similar but I just found out that the counter balances are thinner than on the old crank, overall the new crank is lighter weight.

My question is, is the etech crank interchangeable with the older style e7?!

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