Transmission fluid leak

Tiny
TPMPRODUCTIONS
  • MEMBER
  • 2006 BUICK RENDEZVOUS
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 307,071 MILES
My transmission is leaking but I'm not sure where. I'm trying to find the leak but I'm having trouble finding it. It's leaking from the passenger side near the front. I get a small puddle underneath the passenger side after being parked for hours. Can someone tell me what could be leaking? Where should I look?I would like to fix it myself. I did notice a small black round piece hanging from a metal hose that comes from the transmission when I followed it to the driver's side I see it (the black piece) but I can't find where the other side goes to.
Monday, August 17th, 2020 AT 4:59 PM

14 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Can you get a picture of this hose that you are talking about? I suspect the hose is a cooler line but we need to see it to confirm that. The best way to find where this is leaking is to use a grease cutting cleaner and spray off the underneath so that you are starting with a clean surface. Then drive the vehicle and start looking under it on that side to see if you can find the origination point. I suspect this is an axle seal but clearly that is a guess at this point.

Let us know if you have questions and we can go from there.
Was this
answer
helpful?
Yes
No
Monday, August 17th, 2020 AT 5:55 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
I think that's a cooler line as well but it's dripping in that area.
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 4:01 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Just to add my 2 cents after looking at the picture you provided it looks like the lock clip is missing. If so, any rattles, vibration, bumps, etc, it could cause the metal line to be leaking. Make sure the o-ring on the metal line is not damaged and the retainer clip is installed to secure the line in place. I've attached your picture and circled in red where the groove is for the clip. Hope this helps and thanks again for using 2CarPros.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 4:36 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
Okay, so the picture was actually older that I took. The clip was in there and the o-ring is bad. I got another connector but it was 800-614 and I needed 800-619 for my vehicle. Didn't even look at the part and spent like an hour trying to figure out why this piece won't screw in, lol. I have the right connector now and will attempt to fix it tonight. Hopefully that is the cause of my leak.
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 5:06 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

If the o-ring is deformed, cut, smashed, or having any other damage it will leak. It is under very high pressure and only held in with that clip. Hope this helps and thanks again for using 2CarPros.
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 5:12 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
No thank you all for all of your help.
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 5:34 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome!
Keep us updated and thanks again for using 2CarPros.

Danny-
Was this
answer
helpful?
Yes
No
Friday, August 28th, 2020 AT 5:47 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
Okay, so I changed the connector to the new one and it's still leaking pretty good. It's leaking at the little rubber piece at the bottom of the radiator. It's coming from somewhere though. I'm not sure. I cleaned it off but can't tell where it's leaking from. I know for sure it's not coming from the transmission. I checked both of those connectors.
Was this
answer
helpful?
Yes
No
Sunday, August 30th, 2020 AT 10:15 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Did you change the o-ring on the metal line or the connector into the radiator? I've attached your picture below. If not leaking out of the connector did you happen to notice if leaking from the connector where it screws into the radiator?
Hope this helps and thanks for using 2CarPros.

Danny-
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Tuesday, September 1st, 2020 AT 3:05 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
Yeah, see the bolt has a washer attached to it now and it's dripping from a spot closer to the middle of the passenger side. I'm gonna go take a picture.
Was this
answer
helpful?
Yes
No
Tuesday, September 1st, 2020 AT 9:29 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Okay, sounds good. Take a picture and upload it here and we can try to see where it's leaking from. Thanks again for using 2CarPros.

Danny-
Was this
answer
helpful?
Yes
No
Wednesday, September 2nd, 2020 AT 10:45 AM
Tiny
TPMPRODUCTIONS
  • MEMBER
  • 86 POSTS
Oh nevermind, I've found the leak. It's leaking at the top of the radiator. The connector at the top is leaking. That would explain the lower hose being wet and other things. Thanks for the help!
Was this
answer
helpful?
Yes
No
Thursday, September 10th, 2020 AT 2:58 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Sounds good. Thanks for the update. Thanks for using 2CarPros. Please come back next time you need some help. Thanks
Was this
answer
helpful?
Yes
No
Thursday, September 10th, 2020 AT 7:22 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Glad you found the leak. Thanks again for using 2CarPros and hope you will use our site again in the future.

Danny-
Was this
answer
helpful?
Yes
No
Friday, September 11th, 2020 AT 11:20 AM

Please login or register to post a reply.

Related Transmission Leak Content

VIEW MORE