Transmission leak, but where to start?

Thread Tools
 
Search this Thread
 
Old Feb 22, 2025 | 04:43 PM
  #1  
Motomx58's Avatar
Thread Starter
|
Junior Member
Joined: Nov 2022
Posts: 8
Default Transmission leak, but where to start?

I noticed I had trans fluid dripping from under my 2004 Ion 1, 5 speed manual. It appeared to be coming from the passenger side cv half has shaft input seal. I replaced that today and I just got back from a test drive and there’s fluid still dripping. I cleaned the under carriage before going out to clean off the fluid flung everywhere from before. There is no residue around the seal I just replaced. The driver side seal seems to be good. I took photos and will circle the area it keeps collecting. I’m hoping it’s not a gasket between the transmission and engine? By the way, isn’t there supposed to be a plug where that big hole is? I’m mechanically inclined, but I don’t know much about this part of the car. She’s my beater with a heater with 214K miles. Just trying to make it a bit longer.


B
 
Old Feb 22, 2025 | 06:38 PM
  #2  
grcauto8453's Avatar
Senior Member
Joined: Jan 2024
Posts: 623
From: Davison, MI
Default

Is it motor oil?
 
Old Feb 22, 2025 | 07:28 PM
  #3  
Motomx58's Avatar
Thread Starter
|
Junior Member
Joined: Nov 2022
Posts: 8
Default

Originally Posted by grcauto8453
Is it motor oil?
Nope, definitely trans fluid. I put new in after the seal replacement and the new drips/puddle are red. I’m about to JB Weld everything shut. Lol
 
Old Feb 23, 2025 | 01:38 PM
  #4  
oldmarine's Avatar
Senior Member
Joined: Jun 2020
Posts: 300
From: Newport News, VA
Default

That hole is there to allow for fluids to drain from the clutch housing portion of the transmission - so the fluids don't accumulate and get into the clutch facing. I am facing having to remove the transmission (again) on my '04 Ion to replace the slave cylinder. I have brake fluid (used in the clutch actuation lines) leaking from that hole, and the slave cylinder is the only component down there that has brake fluid. Transmission fluid leaking there means you have a seal leaking in the clutch housing portion of the transmission. The two most likely are the input shaft seal (coincidentally, part of the clutch actuation/slave cylinder) and an intermediate shaft seal, which is covered with a press-fit cap over the intermediate shaft bearing. I would guess the former. You may be able to use a bore scope camera up through that hole and see if you can pinpoint where the leak is coming from. Look especially below where the slave cylinder mounts against the wall where the input shaft comes through from the gearing portion of the transmission.
 
Old Feb 23, 2025 | 03:25 PM
  #5  
grcauto8453's Avatar
Senior Member
Joined: Jan 2024
Posts: 623
From: Davison, MI
Default

You have a leak at a gasket on the front of the trans. You will have to separate the engine and tranny and and seal the surfaces.
Click in the breadcrumbs and find the entire manual.

https://charm.li/Saturn/2004/ION%20L...20Disassemble/
 
Old Feb 23, 2025 | 03:33 PM
  #6  
Motomx58's Avatar
Thread Starter
|
Junior Member
Joined: Nov 2022
Posts: 8
Default

Originally Posted by oldmarine
That hole is there to allow for fluids to drain from the clutch housing portion of the transmission - so the fluids don't accumulate and get into the clutch facing. I am facing having to remove the transmission (again) on my '04 Ion to replace the slave cylinder. I have brake fluid (used in the clutch actuation lines) leaking from that hole, and the slave cylinder is the only component down there that has brake fluid. Transmission fluid leaking there means you have a seal leaking in the clutch housing portion of the transmission. The two most likely are the input shaft seal (coincidentally, part of the clutch actuation/slave cylinder) and an intermediate shaft seal, which is covered with a press-fit cap over the intermediate shaft bearing. I would guess the former. You may be able to use a bore scope camera up through that hole and see if you can pinpoint where the leak is coming from. Look especially below where the slave cylinder mounts against the wall where the input shaft comes through from the gearing portion of the transmission.
Sounds like I’m going to junk it or sell it as is. I don’t have the correct space, time, or experience to fix this part. Thank you for the response!
 
Old Feb 23, 2025 | 03:35 PM
  #7  
Motomx58's Avatar
Thread Starter
|
Junior Member
Joined: Nov 2022
Posts: 8
Default

Originally Posted by grcauto8453
You have a leak at a gasket on the front of the trans. You will have to separate the engine and tranny and and seal the surfaces.
Click in the breadcrumbs and find the entire manual.

https://charm.li/Saturn/2004/ION%20L...20Disassemble/
Thank you for the response. Sounds like I’m just going to sell it as is or junk it. I don’t have the experience or space for this type of challenge. She’s old, beat up, and rusty. I was just trying to get an another year out of her.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jakobk
Saturn Ion
7
Oct 19, 2024 01:09 AM
That1dude
Saturn Ion
24
May 21, 2024 05:10 PM
New07Vue2.2
Saturn Vue
9
Jun 3, 2021 10:02 AM
maximumbob
Saturn Vue
3
Feb 3, 2021 01:44 AM
ZigZag
General Tech Help
6
Mar 29, 2005 01:06 PM




All times are GMT -5. The time now is 06:52 AM.