Re: GM 4L60E Transmission Adapted for 1955 Packard 400

Posted by Kevin AZ On 2011/9/22 19:13:52

I put 100 high elevation miles on the Packard 400 today in the White Mountains of Arizona. No issues with the transmission performing. I also at one point got her up to 75-80 MPH (fastest I've ever driven in her) passing another car up a long grade. Wow is all I can say.