Re: Upgrade or replacing rear end gear ratios

Posted by Ross On 2017/12/8 7:03:33

Overdrive was a popular "high performance" option by 1941 and many have added it after the fact. With it, you can drive nearly 70 at the same engine revs that are now giving you 50.

A Packard overdrive can not just be bolted onto the back of your existing trans as it is integral with the trans. Overdrive transmissions are not hard to come by however as a unit that will bolt right into your car was used through 1950. I think I have at least 2 on hand, and my buddy right up the road has a few more. There are some electrical controls that come with them and a control cable. You would need to have your driveshaft shortened unless you stumbled upon the right one. 110s were not often ordered with overdrive.

From memory I am thinking that the pumpkin in the 110s was smaller than the other cars. If it was a 120 you could drop in a pumpkin from say a 52 200 and have 3.54 or 3.9 gears.