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Old Mar 27, 2015 | 06:08 PM
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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
 
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Old Mar 27, 2015 | 06:12 PM
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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.
 
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Old Mar 27, 2015 | 07:04 PM
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That's an input shaft seal. Where did you find it, and how did you get it out?
 
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Old Mar 27, 2015 | 07:16 PM
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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
 
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Old Mar 27, 2015 | 07:18 PM
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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
 
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Old Mar 27, 2015 | 08:03 PM
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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?
 
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Old Mar 27, 2015 | 08:22 PM
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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
 
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Old Mar 27, 2015 | 11:33 PM
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Maybe this will help?
 
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Old Mar 28, 2015 | 05:45 AM
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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.
 
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