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Dimension for correct NP205 output seal

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Littlebeefy

Dimension for correct NP205 output seal

My NP205 is leaking and I'm going to pull it and replace the gaskets and seal at the output where I see the leak. I'm having trouble finding the right seal to fit my mix of parts. I have a Ford NP205 (stock) with a 1350 flange that has a 2.125" OD (aftermarket). What is the correct dimensions for the seal? Should the OD be 3" or 3.06" and what is the correct width?

2.125" yoke OD was on some 79s F trucks with the 2 speed NP205, but depending on whether I look at Rock Auto or JBG, I get different Timken part numbers for a 205. I know the NP205 doesn't apply to the Bullnose, but hoping someone here knows the answer.

LittleBeefy aka Chad

“Dot Doitall”: 1984 Bronco XLT
460 (C8VE), Edelbrock Pro-Flo 4, ZF5, NP205, D44HP solid axle, 4.56
urban assault vehicle

"Bebe": 2022 Bronco Badlands 2dr
2.7l, Sasquatch, Iconic Silver, Black Marine-grade interior, hard-top

"Celeste": 1979 Porsche 928
4.5l K-jet, 5-sp, S4/GTS brakes, LSD, Pasha interior

Gary Lewis

Re: Dimension for correct NP205 output seal

Administrator

Chad - I don't know the answer to the question, but I'm hoping this will help you figure it out. I've extracted the pages from the 1973-79 MPC that I think are applicable to the NP 205. And in the parts list you want column J. And hopefully the illustrations I've included are for a 205, but the MPC doesn't really say.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Littlebeefy

Re: Dimension for correct NP205 output seal

Thanks, Gary. As the Executive often says to the Engineer, "The answer you gave me is thorough and technically accurate, but it does not help me solve my problem at all." I need this documentation for my transfer case, though, so I really appreciate that.

From what I can tell the correct OD for the rear output seal on the NP205 is 3.06" and the depth should be .47". I'm going with SKF 21215 for the seal.

Gary Lewis

Re: Dimension for correct NP205 output seal

Administrator

Sorry, but that's the best info I have. Please let us know what you find out.

Gary, AKA "Gary fellow": Profile