Leaky Transmission Pan Gasket - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Transmission All about the Chevy Cobalt Transmission

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 05-13-2014, 06:43 PM Thread Starter
Staff Alumni
 
stratosproject's Avatar
 
Join Date: Mar 2010
Location: Minneapolis, MN
Posts: 1,420
Leaky Transmission Pan Gasket

So, I'm on vacation this week and decided to tackle some maintenance. Everything was successful, except for the tranny (it's an automatic). I got the transmission drained, mating surfaces cleaned, gasket cleaned and put her all back together. However, the pan leaks like a sieve along the entire back.

I've disassembled and reassembled twice now. Gasket is aligned perfectly, hand tightened all bolts to finger tight, and torqued to 89 in lbs in a criss-cross pattern. Son of a gun still leaks. I've read that the gasket is reusable, and by all accounts it's not ripped up. Anyone else have trouble doing this job?

"You all know I take great pride in my title as Mr. Positive."
My Showoff
stratosproject is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 05-13-2014, 06:47 PM
Contributor
 
FloodKillaz's Avatar
 
Join Date: Mar 2014
Location: Lancaster, Pa
Posts: 278
Garage
id just throw another one on. It might have been smashed down too tight from factory, or when it was last done.

2010 Cobalt LT K&N TYPHOON INTAKE
2004 Cavalier LS clone
2003 Saturn L200 Fully loaded-Sold
1987 Toyota Celica
FloodKillaz is offline  
post #3 of 9 (permalink) Old 05-13-2014, 06:51 PM Thread Starter
Staff Alumni
 
stratosproject's Avatar
 
Join Date: Mar 2010
Location: Minneapolis, MN
Posts: 1,420
I may end up heading up to the dealer tomorrow. Paying $60 for a gasket is no bueno. I do have the neoprene gasket that came with the new filter, but I've read that those are junk.

"You all know I take great pride in my title as Mr. Positive."
My Showoff
stratosproject is offline  
 
post #4 of 9 (permalink) Old 05-13-2014, 06:57 PM
Contributor
 
FloodKillaz's Avatar
 
Join Date: Mar 2014
Location: Lancaster, Pa
Posts: 278
Garage
maybe for now to stop the leaking it would be okay. Did you install a magnet?

2010 Cobalt LT K&N TYPHOON INTAKE
2004 Cavalier LS clone
2003 Saturn L200 Fully loaded-Sold
1987 Toyota Celica
FloodKillaz is offline  
post #5 of 9 (permalink) Old 05-13-2014, 07:11 PM Thread Starter
Staff Alumni
 
stratosproject's Avatar
 
Join Date: Mar 2010
Location: Minneapolis, MN
Posts: 1,420
Yeah, magnet is cleaned and back in its home. I'm thinking I may need to bite the big one and drop for the new gasket. I'd had to have to go back in and pay for a new filter and new fluid to boot.

"You all know I take great pride in my title as Mr. Positive."
My Showoff
stratosproject is offline  
post #6 of 9 (permalink) Old 05-13-2014, 07:16 PM
Contributor
 
FloodKillaz's Avatar
 
Join Date: Mar 2014
Location: Lancaster, Pa
Posts: 278
Garage
I heard they dont come stock with a magnet. I really dont want to drop my pan to put one in.

2010 Cobalt LT K&N TYPHOON INTAKE
2004 Cavalier LS clone
2003 Saturn L200 Fully loaded-Sold
1987 Toyota Celica
FloodKillaz is offline  
post #7 of 9 (permalink) Old 05-13-2014, 07:19 PM Thread Starter
Staff Alumni
 
stratosproject's Avatar
 
Join Date: Mar 2010
Location: Minneapolis, MN
Posts: 1,420
Can't say for certain, but mine has always had one as far as I can tell. Good thing, too. There was a decent amount of sludge/particulate on it this time around.

"You all know I take great pride in my title as Mr. Positive."
My Showoff
stratosproject is offline  
post #8 of 9 (permalink) Old 05-14-2014, 06:14 AM Thread Starter
Staff Alumni
 
stratosproject's Avatar
 
Join Date: Mar 2010
Location: Minneapolis, MN
Posts: 1,420
After a little more Google time, I am beginning to think the pan bolt holes are dimpled from a previous tech over-torquing. In fact, I did notice that yesterday but assumed it was normal, to a degree. Seems a lot of people had the same issue and needed t lightly tap out the inversions. I will repost with an update for anyone who's interested.

"You all know I take great pride in my title as Mr. Positive."
My Showoff
stratosproject is offline  
post #9 of 9 (permalink) Old 05-14-2014, 02:40 PM
Cobalt Specialist
 
Dustinb855's Avatar
 
Join Date: Jun 2013
Location: Westminster, CO
Posts: 1,373
I would get a new gasket. As soon as you break that original seal its not going to go back perfectly the way it was.
Dustinb855 is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome