GMC Terrain, Equinox, and SRX Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter · #1 ·
I'm looking for an explanation on how I did not have any problems for over one year while driving 15k miles with my 6 speed trasmission overfilled by about 2 quarts (60oz).
I discovered this over the weekend when I opened the overflow port after getting the trans up to temperature. I had the Terrain with 2.4 engine up in the air and decided to check this out of curiosity. Luckily my oil change bucket had room to collect this. I had thought I opened the drain port since it seemed like it would not stop coming out! I had always heard that overfilling these would cause seals to blow and or harsh shifting. I had neither of these happen. Did I get lucky?
BTW, car shifts fine after removing all of this fluid. I drove 240 miles since last Saturday.
 

·
Registered
Joined
·
2,640 Posts
You were just lucky, you didn't pull the engine drain plug by mistake.;)
Overfilling IS hard on a tranny.
The 6T40 does have a vent tube on top for pressure relief.
 

·
Registered
Joined
·
975 Posts
Looks like that trans. has some ''cushion'' in it's capacity.
17688
 

·
Registered
Joined
·
5,119 Posts
interesting spec.
When I do my drain/refill on my transmission. I refill with 5.3 qts.
On both my Traverse and Equinox. I believe the Equinox - the 6T70
 

·
Registered
Joined
·
269 Posts
The 9 speed here drain/refill takes just under 5 qts
 
1 - 5 of 5 Posts
Top