Re: GM 4L60E Transmission Adapted for 1955 Packard 400

Posted by Craig Hendrickson On 2011/9/14 20:23:22

A couple of more details that Kevin mentioned to me:

- Used the rear half of the Packard driveshaft and yoke and the front half of one from a GM truck. This required a professional driveshaft company to weld, fit and balance.

- Trans dip stick had to be relocated (see picture above).

- Throttle position sensor had to be fitted (see picture above).

- Speedo output cable first goes to a computer box and then to the original speedo.

- The shift points and other behaviors are programmable, but Kevin is not going there (I would).

- Gear ratios for the 4L60 are 3.06:1, 1.63:1, 1:1 (direct), 0.70:1 (OD). Compare that to the T-U's 1.82:1, 1.0:1 (IIRC).

- Both T-U and 4L60-E have lock up converters.

Kevin said he is planning on driving his 400 to the PackardInfo meet in Laughlin in Nov, so you can inspect it first hand if you can make it.

Craig