Re: GM 4L60E Transmission Adapted for 1955 Packard 400

Posted by Craig Hendrickson On 2011/9/14 19:51:49
Quote:
I just looked at some specs and was curious why this one instead of the later heavier version or wouldn't that one fit. I wonder about the lower torque rating.


Quote:
Why the GM 4L460E rather than a 700R4 or 200R4 or some other trans????


I have not seen Kevin's installation, but from his explanation to me over the phone, the 4L60-E (or 4L60) has a removable front "bell housing" unit. This allows it to be mounted in many different cars simply by changing the converter cover/bellhousing. Here's a picture of a typical one:

Original Image

As I understand it, the way the conversion was done was to cast a machinable replacement converter housing/bellhousing which can be bolted to the 4L60 and the Packard engine block.

On the other hand, the 4L80-E housing is one piece which would require machining the housing itself ala the 700R-4 and TH-400 conversions:

Original Image

Craig

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