56 Rear End Original Gear Ratio

[Cwwaddell]

Any way to check if a rear end is original? What gear ratio's were standard for an automatic? And mine is leaking at the pinion. Can the seal be replaced with the pinion in the car?

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[cokefirst]

if it has a removable panel on the backside, it is probably original. The gear ratio for the automatic is 3:31. Yes, you can replace the pinion seal without removing the pinion from the car. You need to take off the pinion yoke and then remove the seal.

 

[biddle]

Your subject ”56 Rear End" has beed changed to "56 Rear End Original Gear Ratio" to summarize your post.

 

[doug7740]

Attached is an article from the July/August Early Bird magazine which might answer your questions regarding the differential on your car.

doug7740
1955 Thunderbird Blue