Np435 issues in 3rd gear

[jperry1290]

Had my NP435 in the EB for approx 10years and maybe 3000miles of easy street driving. No 4WD at all. Recently the 3rd gear felt like it was slipping or rythmically losing power along with a clunk noise. I pulled the top cover and side inspection cover only to find a small metal chunk missing from 1st gear and a small metal chunk on the bottom of the trans. 3rd gear looks good besides a slight score mark, but all gears are clean.

Is it a clutch issue? Anything else I should look at? Unfortunately I dropped the tcase already so no more test driving

 

[Broncobowsher]

When you say 3rd gear, I just want to clarify what that is. It can be confusing.
Are you counting the low gear as #1, as in you are having issues in gear #3 out of 4 speeds?
Or are you skipping the low gear and just calling it a 3-speed and having issues in gear #3 of 3 normal use gears? (Low + 3 normal gears)

 

[jperry1290]

The actual 3rd gear. Having the issue around 20-25mph. Didn’t drive any faster than that

 

[blade]

Being that you have the tcase out you might as well pull the trans and check the clutch. Can you also post pics of the broken gear? the problem may have been that small piece of gear was stuck in the gears for third and causing a bind as it went around.

 

[Broncobowsher]

OK, at this point I am wondering what that chunk looks like.

Did you have it in gear when you pulled the transfer case? The output shaft can pull out in the transmission. There is a chance you will need to pull the transmission just to take it apart and put it together again if that shaft pulled out.

 

[Brush Hog]

My NP 435 was acting like that in 3rd gear. Thought my clutch was shot. Adjust the clutch rod out some more and the issue went away. But you might have other issues since you found metal.

 

[Johnnyb]

Long time ago, before 23 gallon tank, I was driving from PHX to FLG and realized I was nearly out of gas at 169 on top of Mingus Mountain.
Well I was young and dumb, so I put NP435 in neutral and coasted the 11 or so miles to Camp Vrede.
About 2/3 of the way down the hill, I felt EB slow down, like I had applied the breaks and a burnt smell.
I made it to gas, but 3rd. Was never the same after that. No synchro, pop out, etc. I would have rebuild the tranny, but found another NP435 for cheap and swapped it
Just for clarification, granny is 1st., normal start is 2nd. 3rd. Is hill climbing and 4th is top.
-JB

 

[Broncobowsher]

I've heard the NP435 is not happy being flat towed in neutral before. Needs the engine running to spin the gears in the oil doing that splash lube thing inside.