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Discussion Starter #1
This is actually in regards to an 03 Xterra, but my post on the club xterra forum has gotten 0 replies in 4 days. This site helped me change a center support bearing a couple months back, so I thought Id try again.

This is the problem and where Im currently at.

Clutch not fully disengaging

On my way to work I stopped at a light, as normal. When the light changed and I tried to shift into gear, it would not go. It didn't want to go into ANY gear. After several attempts, I finally got it to slip into 3rd and made it to work. There have been no previous warning signs, such as noise or slipping and if I start it in gear, it lurches forward. I've been told that this suggests nothing major to be wrong with the clutch itself. I also still have a strong pedal. I was told that suggests the master cylinder is fine and that I should start with the slave cylinder, my initial hope of the culprit. Not too mention the fluid was slightly above min and pretty dark.

New slave installed. New fluid bled through until there was a solid, clear stream. Pedal still strong, maybe even a little more so. Still not wanting to shift into gear properly. After several attempts, I did get it to go through the gears but not easily, not consistently, and though they aren't really grinding, you can hear the metallic ting of them wanting too. Tried more bleeding with no luck.

Haven't done anything with the master cylinder other than check fluid. I have found many similar scenarios online (many different vehicles types), but no answers. At least none that worked for me. Some had even changed the MC, with no luck. Thought I'd try posting here before moving on to the MC. Any input appreciated?
 

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I4 or V6? Miles? No prior warnings/signs of this issue?
Shooting from hip here and short of internal issue:
shift linkage
trans mount
 

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Discussion Starter #4
New master cylinder. No Change. I guess it's something internal that's gonna be big $. Who knows when and where I'll pull those funds. Don't understand how it could be linkage or tans mount, if it's shifting fine when not running. So frustrating. Thanks for the input. Still nothing from the Xterra site.
 

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Does pumping the clutch pedal make a difference. Have you changed the transmission fluid? take a look at the drain plug magnet and see if there are chunks of metal on it
 

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If it shifts fine with the vehicle off then it is an issue with the disc or the throw out bearing. My money is on a spring popped out and the cage it sits in is cracked. You are going to have to drop the transmission on this one. I had this exact same problem on another nissan. When I dropped the tranny I had a cracked disc, two broken clips that hold on the TOB and a broken TOB. But when I researched it, just a broken disc was the most common culprit.

Don't worry I have a nissan in my garage right now that the tranny detonated. We dropped it, put in a new to us tranny and new clutch kit including internal slave. We buttoned it all up and the new slave somehow cracked where the tube connects. We dropped the tranny again and put in a new slave and now for some reason the clutch pedal is rock hard LOL. So we may be dropping it a third time. FUN FUN FUN!!
 

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Clutch

I agree with robj80, drop the trans, check the pressure plate and throw out bearing make sure it's seated in the clutch Fork correctly. Well look at it this way, with that many miles it might need a new clutch anyway. I don't know what your skill set is, but if you got the right tools it's not all that bad.
 
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