Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

NP435

Thread Tools
 
Search this Thread
 
Old Mar 27, 2015 | 06:08 PM
  #1  
Jtay561's Avatar
Jtay561
Thread Starter
|
Freshman User
Joined: Nov 2014
Posts: 42
Likes: 0
NP435

Well as with many one hour projects... Mine just took a turn to becoming an entire weekend...maybe..

While changing fluid on my np435 I stuck my finger in the drain hole and was unpleasantly surprised to find this


Inside diameter approx 1.5" outside approx 2"

Can someone help me with what this seal most likely is for I have never opened up a 435 and am trying to figure out next course of action.

Drop tranny? Take top cover off?

What do you guys think
 
Reply
Old Mar 27, 2015 | 06:12 PM
  #2  
85e150's Avatar
85e150
Super Moderator
20 Year Member
Community Builder
Liked
Community Favorite
Joined: Apr 2004
Posts: 34,472
Likes: 2,799
Club FTE Gold Member
Is your trans leaking?

Noisy?

Popping out of gear, growling, locking up, smoking, flinging cast iron into the upper atmosphere?

None of the above? If so, refill and drive with pride.

One or more--prepare to rebuild.
 
Reply
Old Mar 27, 2015 | 07:04 PM
  #3  
ronspolv's Avatar
ronspolv
Senior User
Joined: Aug 2014
Posts: 103
Likes: 0
That's an input shaft seal. Where did you find it, and how did you get it out?
 
Reply
Old Mar 27, 2015 | 07:16 PM
  #4  
Jtay561's Avatar
Jtay561
Thread Starter
|
Freshman User
Joined: Nov 2014
Posts: 42
Likes: 0
Not leakin . Not sure about anything else this is newly acquired project and trying to get it runnin right and ready to be a dd . Have only about 25 miles on it myself
 
Reply
Old Mar 27, 2015 | 07:18 PM
  #5  
Jtay561's Avatar
Jtay561
Thread Starter
|
Freshman User
Joined: Nov 2014
Posts: 42
Likes: 0
I found it sitting in the bottom of the trans by sticking my finger in the drain hole. Then took inspection cover off to get it out
 
Reply
Old Mar 27, 2015 | 08:03 PM
  #6  
85e150's Avatar
85e150
Super Moderator
20 Year Member
Community Builder
Liked
Community Favorite
Joined: Apr 2004
Posts: 34,472
Likes: 2,799
Club FTE Gold Member
Originally Posted by Jtay561
I found it sitting in the bottom of the trans by sticking my finger in the drain hole. Then took inspection cover off to get it out

Inspection cover = PTO port.


WAG alert: My guess is some prior owner did a rebuild and was very sloppy with that seal. If it had the proper oil level in it and was not leaking, then there must be a seal in there. Does it shift ok?
 
Reply
Old Mar 27, 2015 | 08:22 PM
  #7  
Jtay561's Avatar
Jtay561
Thread Starter
|
Freshman User
Joined: Nov 2014
Posts: 42
Likes: 0
It shifted alrigh . Not super nice not super rough. It had about 4 quarts or so of fluid in it and didn't lea . I'm not sure what a normal level is. I just took apart a spare np435 that the po had laying around

It seems like it would be impossible for this seal to work its way into the case unless it was just left there during a rebuild
 
Reply
Old Mar 27, 2015 | 11:33 PM
  #8  
77&79F250's Avatar
77&79F250
Moderator & parts slinger
Veteran: Army
15 Year Member
Community Builder
Liked
Joined: Feb 2007
Posts: 50,135
Likes: 5,778
From: S/W Missouri, Polk county
Club FTE Gold Member
Maybe this will help?
 
Attached Images     
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Mar 28, 2015 | 05:45 AM
  #9  
ronspolv's Avatar
ronspolv
Senior User
Joined: Aug 2014
Posts: 103
Likes: 0
If it is the input shaft seal from this trans, there is no way it can pop out and get into the case. It is pressed into the front bearing retainer, and the input shaft bearing blocks it from the case, and the input shaft goes thru the seal. Must have been left over from a rebuild or reseal and fell into the case.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
LCA078
1999 - 2003 7.3L Power Stroke Diesel
11
Feb 26, 2022 05:45 PM
nathank
2007 - 2014 Expedition & Navigator
1
Apr 11, 2016 08:08 AM
Gembone
1967 - 1972 F-100 & Larger F-Series Trucks
11
Feb 21, 2014 11:17 PM
CountryFried
Clutch, Transmission, Differential, Axle & Transfer Case
3
Sep 10, 2009 10:47 AM
60RatRod
1999 - 2003 7.3L Power Stroke Diesel
19
Mar 3, 2009 09:15 PM




All times are GMT -5. The time now is 09:16 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE