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Old 01-22-2022, 06:02 AM   #1
IssaNissan
 
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Default PLEASE HELP! Rear End Pinion Seal Issue!

My pinion seal exploded, and gear oil slung all over my fuel tank.

I emptied out my rear, and to my surprise the oil looked gold still.

And a LOT of oil came out.

I removed the flange and pulled the seal.

I go to put the new seal in, and it is too big.

I purchased................

Master Pro Pinion Seal (Part# 710245)

O'Rilleys also has another seal showing.

National Pinion Seal (Part# 710592)



The Master Pro is (Outside Diameter 76mm) Rear- Outer - H233B

The National is (Outside Diameter 67.2mm) Front Outer 4WD Nissan R180A Diff



Maybe the Master Pro is the right part? And I am a idiot!

Maybe the National is the right part? And my rear end is a (window licker) "Special"!

I don't know! I need help fellas!

I seen others saying their bolt for the flange was a 30mm, and mine is a 27mm.

What am I missing here? PLEASE HELP!
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Old 01-22-2022, 10:20 AM   #2
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Is this for the 93 in your profile pic? If so, neither of those seals are correct. Your truck should have an H190 axle in that truck. The door sticker will likely call it an HF35. The seals you’re looking at are not for that axle. The master pro seal is for the H233b axle found in the V6 trucks and 4wd trucks. The second one is for a 4wd front axle.

Look at rockauto, they have a national seal #1979 that is for the h190 axle.
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Old 01-22-2022, 02:09 PM   #3
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Yes Sir! Same one! Still treating me right.

Thank you Bama. I knew I wasn't losing my mind.

I am going to try to find it local with the part number to cross match it.

I have a spare rear end in the garage I can swap if I cannot find the seal local.

Due to........................

A) My truck already sat a week cause the Load Proportion Valve started dumping brake fluid. (How I noticed the diff leaking.)

B) I did NOT mark the flange nut before removing it, for pre-load reference.

C) I beat the flange off with a hammer, instead of using a puller.
And the shaft coming out of my rear end has A LOT of play. (Side to Side/ Up and Down)

Maybe that 3/4" play is normal since the flange is not holding the shaft in place?

I don't know bro! What a mess.

THANK GOD I bought that extra rear end a time back to weld for possi traction.

Just never got around to looking for someone to weld it for me. And didn't have the funds for the Beebani rear disc kit.

Thanks for the help.

One more question...............

Is the play in the output shaft normal with the seal and all removed??

Also, will I be ok if I KNOW their was only (2) threads above the flange bolt before I removed it?

It was tight. I had to use my impact.
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Old 01-22-2022, 03:02 PM   #4
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I’ve never pulled a pinion flange so I can’t help you with any of that
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Old 01-22-2022, 03:06 PM   #5
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Well thanks for the help you already gave me.

I found the National #1979 @ O'Rilley's.

It will be at my local store for pick up in about an hour.

Going to put it in, torque it down to 2 threads showing, fill it with oil, and send it.

My rear made no noise what so ever before the leak, so....... fingers crossed.

Thanks again bro.
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Old 01-25-2022, 12:45 AM   #6
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Quote:
Originally Posted by alabama_lowlife View Post
Iíve never pulled a pinion flange so I canít help you with any of that
As always Bama, thank you for chiming in bro! Hope all's well.

The National 1979 pinion seal worked like a charm.

Not sure which one came out of the rear. I have one from Nissan on order, and will be here tomorrow. Then I can see if the one I pulled was OEM.

But............... No LEAKS! So I ain't messing with it.

And I put a few high RPM hours on the rear end Sun and Mon.

The slack in the pinion shaft was non-existent once I tightened the nut down, after installing the new seal.

It seems the sleeve on the pinion flange holds the bearing, and the pinion shaft lined up, and snug.

My impact took some "UMFFFF" to get the nut off, so I gave it a little "UMFFF" putting it back on.

Also put back with the same (2) threads sticking above the nut as before I loosened the nut.

She rides SO SMOOTH! No complaints!

So thanks again brother! I appreciate you and everyone else here, that go out your way to help another.
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