NP208 front output shaft seal-Can't seem to find one & I'm stumped

[georgia mike]

I've been dealing with a leaky NP208 front output shaft seal on my 1008 for a little while now and decided to go ahead and fix it. Very easy job to tackle but not so easy to find the part, it seems. All of the parts houses around my area either say it's not available, or only lists the NP205 seals. Advance, Autozone, O'Reilly are all the same = no dice. Even my old fall-back Rock Auto doesn't list it and only lists the 205. I can look under K10 instead of K30 and the 208 comes up there. My only concern is that the output flange's shank may be a larger diameter on a K30 vs a K10.

Am I just being paranoid and over thinking it, or is the seal actually different between a K10/K30 NP208c?

 

[doghead]

Simply looking at the picture of the T case in the -20PTM, gets you the correct part number.

29940-0435

and a Google search for that gets you, http://www.autopartoo.com/oem/garlock/299400435.html

All that in 2 minutes from my laptop.

 

[doghead]

Napa 47726

 

[georgia mike]

Thank you sir

Edit: I must be doing something wrong. I searched NAPA site and that part number does not exist. I'll continue the search.

Thanks again.

 

[georgia mike]

Ok, following the lead you provided, I was able to find a Timken part # that crosses over to a K20. Thank you for the lead, sir

 

[doghead]

Please post the part number you ordered or bought, that way someone else may find this thread someday and get the info.

 

[Warthog]

Thank you sir

Edit: I must be doing something wrong. I searched NAPA site and that part number does not exist. I'll continue the search.

Thanks again.

Using the napa interchange application the 299400435 part number crosses to Napa Oil Seal NOS 18771.

 

[Warthog]

All that in 2 minutes from my laptop.

I thought you where using your WebTV remote.

 

[georgia mike]

Timken 3946
Application is listed for a 1986 Chevy K20 NP208 front output seal. Putting it in tomorrow. If I don't update this post to the contrary, this should be the one needed.

Once again, thanks for the help!

 

[hoplite666]

Replaced that same seal awhile back. Noticed some drip drip drip action still going on afterwards. Finally got around to putting a sleeve on the output shaft (it was a little marred up). Just wrapped that up the other day. Simple enough. Upon inspection it still seems as though its sweating fluid out from the seal area. Ugh. To be honest I wouldnt doubt that the seal seat area is a little marred up from pulling the old one out but it would very vey minor if at all.
Thoughts?

 

[cucvrus]

My thoughts are I would put some Permatex The Right Stuff on the seal flange and hammer it in place. That would take care of some of the imperfections on the tail-shaft housing of the transfer case.

 

[hoplite666]

My thoughts are I would put some Permatex The Right Stuff on the seal flange and hammer it in place. That would take care of some of the imperfections on the tail-shaft housing of the transfer case.

.....Agreed

 

[Zmann]

Using the napa interchange application the 299400435 part number crosses to Napa Oil Seal NOS 18771.

to validate and to thank this thread for the help the Napa seal 18771 (SKF) is a double lip seal like it should be and fits perfectly in the 208 front output

 

[FrankenCub]

Replaced that same seal awhile back. Noticed some drip drip drip action still going on afterwards. Finally got around to putting a sleeve on the output shaft (it was a little marred up). Just wrapped that up the other day. Simple enough. Upon inspection it still seems as though its sweating fluid out from the seal area. Ugh. To be honest I wouldnt doubt that the seal seat area is a little marred up from pulling the old one out but it would very vey minor if at all.
Thoughts?
View attachment 575992

I need to replace my seal as well, t-case came from a civi truck so I'm sure it has quite a few miles on it. Does NAPA stock those sleeves? I should have changed them when I put this case in but needed to get the truck on the road ASAP. Doesn't leak bad but still marks it territory like a Harley.

 

[Chaski]

Timken KWK99187


Before...

 

[Zmann]

Nice.
I did not know they had those available
Drive shaft adapter seal area looked ok. But not nearly as smooth and polished as that sleeve

 

[Zmann]

Also remember there is a rubber seal behind the one time use nut that holds the adapter on the splined shaft. So oil can travel down the splines and escape if the rubber washer seal is bad. It will look like your new seal is leaking

 

[FrankenCub]

View attachment 689007
Timken KWK99187


Before...
View attachment 689078

Thanks a bunch, part number saved

Also remember there is a rubber seal behind the one time use nut that holds the adapter on the splined shaft. So oil can travel down the splines and escape if the rubber washer seal is bad. It will look like your new seal is leakingView attachment 689091

I've been looking through TH34p and there isn't a rubber seal shown, just the nut and lock washer.

 

[Zmann]

Mine is an 81 civilian Jimmy
I read a mention of the rubber seal
And found a place to buy them.
Upon disasembly i found mine had the rubber washer in place. So i put a little RTV on it
And reused it.
I found it shown on some diagrams for the 208
I will post some info later when i am near pc

 

[cucvrus]

It still has an output seal in the transfer case housing.