Jump to content

Rear Pinion Seal Leaking


mmarkovich1

Recommended Posts

1950 Plymouth Special Deluxe - I have replaced the rear pinion seal three times. I tighten the big nut down. I even use an impact wrench. Can't figure out why it still leaks. Can anyone give me some suggestions. I hate leaks.

Link to comment
Share on other sites

What is the condition of the portion of the pinion flange that the seal runs on? If it has been worn then throwing new seals on there will just damage the new seal and it will leak immediately.

 

If the surface is worn, rough or grooved, a speedi-sleeve could be an easy fix when you install yet another new undamaged seal.

  • Like 1
Link to comment
Share on other sites

I tried a speedy sleeve. It was not long enough to cover the entire shaft. But I installed to cover a minor groove. 

 

I just re-installed the new pinion seal this spring (for the 4th time). Still leaking. My repair book says to replace old fluid with new, 3 1/4 pints of 90W gear lube. I may have overfilled. Is 3 1/4 pints correct? 

Link to comment
Share on other sites

Don't know the volume. . . I just fill mine to the bottom of the fill plug.

 

Is your breather clean? On most old Plymouths it is a special bolt that holds the brake T fitting on the top of the rear axle. If it has been swapped with a regular bolt or has gotten clogged then the rear axle may be building up pressure which can lead to leaks.

Link to comment
Share on other sites

I tried a speedy sleeve. It was not long enough to cover the entire shaft. But I installed to cover a minor groove. 

 

I just re-installed the new pinion seal this spring (for the 4th time). Still leaking. My repair book says to replace old fluid with new, 3 1/4 pints of 90W gear lube. I may have overfilled. Is 3 1/4 pints correct? 

I see you are from Pataskala. Can you post a picture of your car?

Link to comment
Share on other sites

I will check the breather. It is mounted on the rear axle. Not sure if that is the cause of the leak. Because it leaks even when not driving,

 

I will post a couple of my car photos as soon as I figure it out.

Link to comment
Share on other sites

I am from Pataskala, OH. I posted 2 photos of my car. We are originally from Pittsburgh. Had the car for about 13 years. I love driving the 3 speed. Hat the single bowl master cylinder and drum brakes.

Link to comment
Share on other sites

I am from Pataskala, OH. I posted 2 photos of my car. We are originally from Pittsburgh. Had the car for about 13 years. I love driving the 3 speed. Hat the single bowl master cylinder and drum brakes.

As I write this my wife is spending time with her sister-in-law on Mink Road in Pataskala

Link to comment
Share on other sites

  • 1 year later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Terms of Use