Overdrive for the ‘55: making the np833 fit.
Last time I described why I wanted to use an np833 4spd overdrive trans in my ‘55. The only things that needed to be changed were:
1. The shifter, the car had 3 on the tree, new trans was 4 on the floor. The shifter mounts to the trans and the car already had a hole in the floor (probably from a 3 spd. floor shifter), so this was easy.
2. The driveshaft yoke had different splines. I went to the junkyard and picked up a driveshaft for a 350 turbo trans and just switched yokes (to be shown in a future post).
3. The front bearing retainer on the trans, which also centers the trans in the bellhousing, had the larger truck diameter of 5 1/8″. I didn’t want to change the bellhousing, so I unbolted the bearing retainer and took it to a local machine shop. They turned down the O.D. to 4.68 for only $15 (I think they gave my wife a good deal). Below is a pic of the newly machined part, as you can see, the bolt holes are very close to the edge.
You can see the original diameter from the gasket, nearly a 1/4″ had to be turned off (I later trimmed the gasket with a razor). I had to replace the hex head bolts with allen head bolts. Next time, the driveshaft gets new univerals and the trans goes in (for the first of 3 times).
Hey Eric!
Cool pictures all around, and some from MT, too!
Comment by Dwight Schwartz — September 28, 2005 @ 4:29 pm