240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

Transmission oil leak

Old 12-11-2014, 07:06 AM
  #1  
Pez
Registered User
Thread Starter
 
Join Date: Oct 2012
Location: Fort Wayne, IN
Posts: 135
Transmission oil leak

I removed the driveshaft as I am servicing the differential mount. I noticed yesterday that the transmission is leaking from the back. I had previously checked the FSM to get an idea for the driveshaft removal, and I noticed:

"Watch for oil leakage from the transmission rear end. Take proper action if oil leak is discovered.", however it didn't elaborate.

I got under the car yesterday to progress on the diff mount, and sure enough there is a leak of oil from the transmission rear end.

Do I just need a new seal? I looked at the transmission section of the FSM and nothing really jumped out at me as to what the 'proper action' might be in this case, nor were there instructions for how to replace just the rear transmission seal.

Any advice?
Pez is offline  
Old 12-11-2014, 08:08 AM
  #2  
Registered User
 
Join Date: Apr 2013
Location: Northern California
Posts: 153
Leak

Hey Pez, what do you think it is if there is a leak that you can see ? Let me know what you think.
Zdon is offline  
Old 12-11-2014, 08:14 AM
  #3  
Registered User
 
beg3yrs's Avatar
 
Join Date: Apr 2013
Location: Tucson, Arizona USA
Posts: 575
Do you know if it was leaking before you pulled the driveshaft?

These things will leak out the back end if they are at an angle and the shaft is pulled. It could also be an overfill. Check the level, it should be just up to the level of the fill hole on the side.

Take a look at the tranny in the lower right part of the photo. That sucker made a huge mess, as did the tranny I pulled from another car. Someday I will learn to drain the oil properly.

Now, you have a five-speed and this one's a four, but I don't think there's much difference at the shaft.
Attached Thumbnails Transmission oil leak-img_4056.jpg  
beg3yrs is offline  
Old 12-11-2014, 08:21 AM
  #4  
Pez
Registered User
Thread Starter
 
Join Date: Oct 2012
Location: Fort Wayne, IN
Posts: 135
I dont think it was leaking...

I supposedly had the seal replaced last summer by a nissan dealer (the only mechanic in town that will touch my car). I should always ask for my old parts back.

My thoughts are that it was
- the wrong seal
- was not installed properly
- I bothered it out when I pulled the shaft

I will get under there on my lunch hour and see if I can catch a drip and see where its coming from.

Cheers
Pez is offline  
Old 12-11-2014, 08:52 AM
  #5  
Registered User
 
beg3yrs's Avatar
 
Join Date: Apr 2013
Location: Tucson, Arizona USA
Posts: 575
This is the shaft end of mine after being serviced. Don't know if it will help but maybe it will give you a reference.
Attached Thumbnails Transmission oil leak-img_4305.jpg  
beg3yrs is offline  
Old 12-11-2014, 11:40 AM
  #6  
Pez
Registered User
Thread Starter
 
Join Date: Oct 2012
Location: Fort Wayne, IN
Posts: 135
Transmission oil leak-leak.jpg

It's leaking across the seal from further inside the unit...
Pez is offline  
Old 12-11-2014, 02:49 PM
  #7  
Registered User
 
beg3yrs's Avatar
 
Join Date: Apr 2013
Location: Tucson, Arizona USA
Posts: 575
Sure seems like that's where I had the oil deluge in my original photo. I looked at the Haynes book and can't easily tell how the seals work. If you've got any kind of a "dangle" to the transmission, try putting a jack under it and level it. If the leak stops, I think you're OK. If it was me, I'd put things back together when I'm ready, check the oil level in the transmission and then monitor for further leaks.

Hopefully someone with more "chops" than I will chime in here.
beg3yrs is offline  
Old 03-01-2015, 11:32 AM
  #8  
Registered User
 
Join Date: Jul 2011
Location: Four corners area
Posts: 47
It's only a leak when the shaft is inserted into the transmission. The shaft and seal keep oil in the transmission. Oil came out when you pulled the shaft. Put it back together and clean it up. Check for leakage after a couple days
turbopuppy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
icemaninlv
300ZX (Z32) Performance / Technical
4
05-29-2014 09:57 PM
Sgonzo
280ZX (S130) Forums
2
08-15-2012 05:42 PM
d33zdrama
280ZX Appearance Exterior, Interior
14
03-03-2012 05:15 PM
Flacster
300ZX (Z31) Forums
2
10-20-2010 07:34 PM
elrivas
300ZX (Z32) Performance / Technical
10
04-21-2007 03:37 PM


Thread Tools
Search this Thread
Quick Reply: Transmission oil leak


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.