04-09-17, 03:13 PM
Has anyone here used the replacement pinion seal #18880 for #663602? Any problems with leaking?
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Opinions on pinion seal
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04-09-17, 11:47 PM
What gear lube did you use to refill ? Did flange have a groove where seal rides? If so you can use a speedy sleeve to fix it.
The Idaho Andy
I love the smell of race fuel in the morning 
04-10-17, 12:21 PM
Didnt change yet ordered seal.the replacement from napa.18880 read couple of forums leaking after installed.. have 80wt-90 to fill after installation
11-25-17, 08:40 PM
Andy i recieved the pinion seal.after reading around im not sure if this is correct seal as napa stated.the leak is where drive shaft goes into rearend.ive tried for awhile to find correct seal on ebay nothing showing up (no auto parts list)is this a obsolete part? If not would you know part #.many thanks
11-26-17, 02:15 PM
Do you have the seal out yet? Need a OD size as there are two to pick from in my old NAPA book and one of them is the # you listed, and check for #s on old seal.
Careful not to damage seal where #s are if possible when removing. NAPA 2.817" #46159 3.109" #49320 = SKF 18880 When you install new one put a little grease around lip and where spring is so it helps keep it from popping off on installation, and put sealer in splines of yokes when putting back together. Do not over torque
The Idaho Andy
I love the smell of race fuel in the morning 
11-26-17, 02:21 PM
Andy, what do you use for sealer on the splines?
President, New England chapter of Coronetaholics anonomous.
11-26-17, 02:26 PM
I keep coming up with a #5851 National also if that helps
The Idaho Andy
I love the smell of race fuel in the morning
11-26-17, 02:28 PM
ws27 Wrote:Andy, what do you use for sealer on the splines? ![[Image: 71GaBaBikCL._SL1500_.jpg]](https://images-na.ssl-images-amazon.com/images/I/71GaBaBikCL._SL1500_.jpg) Gotta be super clean and dry and it sticks and seals real well.
The Idaho Andy
I love the smell of race fuel in the morning
11-26-17, 04:13 PM
(This post was last modified: 09-30-23, 07:30 PM by 67440Dodge.)
The Idaho Andy
I love the smell of race fuel in the morning
11-26-17, 06:23 PM
Andy no haven't pulled out yet was trying to make sure had correct part and procedure to do it.when i checked 18880 said didnt fit 50 coronet, but find one site that said 38-57.i also read they dont make a exact replacement thats why nothing shows up.you would think after all these years someone would confirmed a fittmit .theres a site yoyoparts where you can enter part # & it gives you all comparison s,but it says 55-57 .too much info just confuses the issue
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