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Replace a Cadillac 4.9 with a 4.6?

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Anonymous

14y ago
Updated: 8/17/2019

The 4.6 Northstar has an entirely different transmission than the 4.9l. Introduced in 1993 the Northstar is an OHC aluminum V8 and the 4.9 is an old style push rod engine. They have different engine management systems and are not compatible without changes. It can be done but requires a tranny and computer swap.Dave H

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Wiki User

14y ago

What else can I help you with?