Np203 leak

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Jan 20, 2018 | 06:32 PM

Highboy46

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Mountain Pass

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Np203 leak

Hey guys. Still working on getting my np203 to stop leaking. I have the bearing retainer cover sorted out. But I have a leak at the rear output shaft that looks a little strange to me. If you look at this image you can see that oil is getting out of the case onto the rear output yoke. But it doesn't drip like a output seal would. Instead it drips out of the ujoint carrier between the driveshaft and the transfer case. Is there a seal in behind the output yoke in addition to the press in shaft seal? Tearing into it tomorrow, but just thought I'd ask here.

Jan 20, 2018 | 06:33 PM

Highboy46

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Mountain Pass

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Jan 20, 2018 | 06:46 PM

jakeharp

Fleet Mechanic

Joined: Aug 2004

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From: Nevada

Yep

Dont have a solution, but it looks very much like my np203. My case looks like one big leak

.... This summer will most likely be a transmission, Tcase, drive-line rebuild mission...

Jan 20, 2018 | 06:57 PM

Highboy46

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Mountain Pass

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Yeah. Mine leaked there and from the bearing retainer cover. Power washing the entire thing with purple power made it much easier to figure out. Ha. This looks likes its leaking from between the yoke and the output shaft. Strange. It's dry under the seal where it would normally drip.

Jan 21, 2018 | 06:55 AM

Filthy Beast

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Joined: Mar 2011

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From: Taxachusetts

Looks like grease to me....How's the driveshaft U joints for grease?

Jan 21, 2018 | 08:33 AM

Highboy46

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Mountain Pass

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Nah. It's motor oil... grease doesn't drip. Ha.

I think there's a dropin gasket in there looking at the drawings it just calls it a washer but I think it's a rubber washer. It must be dead.

Jan 21, 2018 | 08:37 AM

J ballan

Fleet Mechanic

Joined: Jan 2012

Posts: 1,668

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From: Saskatchewan

Quote:

Originally Posted by Highboy46

Nah. It's motor oil... grease doesn't drip. Ha.

I think there's a dropin gasket in there looking at the drawings it just calls it a washer but I think it's a rubber washer. It must be dead.

Yep that little rubber washer/gasket must be no good. If I were you I would wash the crap out of it then replace the washer and output seal while it's apart. Good luck.