'55 Roadmaster needs Ring and Pinion Gear

[Centurion]

1955 Roadmaster needs new or excellent used ring and pinion gear. I understand that 1955 Century and Super cars with Dynaflow are the same.

If you have the parts or can point me to a good resource, please post here or e-mail to: laurance@integrity.com

Thank you.

[Centurion]

The parts I'm seeking are for a car with 3.42 rear axle ratio.

[Leif Holmberg]

I can`t find any Ratio 3,42 to Buick in the 50:s But maybe you can use 1954-1955 ser 50-60-70 D.F the Ratio are 3,36. Ring 1168743 and Pinion 1168744 (set.1392481)

[Centurion]

Leif, thank you for the reply. I will re-check the rear axle ratio.

[The Old Guy]

Brian,

If your ring gear is bolted on then you can interchange with any Buick from 1940 to 1955. The only exception is the 90 series. Most v8s with dynaflow had 3.31 --3.42--3.6 ratios. Any one of them will work . If you want to make a stoplite racer out of it ,you can install the 4.4 from a 1940. The only problem with that is it makes your Buick REALLY thirsty, and limits you to 55-60 on the highway <img src="http://www.aaca.org/ubbthreads/images/graemlins/cool.gif" alt="" />

[Guest 53and61]

If you want to avoid the carrier rebuild, you can replace the entire assembled carrier without torque tube from a 40-55. The shop manual admonishes against this, but I did it successfully on my '53. After installing the old drive shaft on the new pinion, you've got to eliminate the drive shaft run-out as described in the shop manual. Then install the torque tube. The end of the drive shaft won't be in the middle of the end of the torque tube, as the tube and carrier are supposed to be machined to each other. I simply shimmed the joint between the tube and carrier by trial and error until the drive shaft was concentric with the end of the torque tube. Worked fine -- no vibration.