GM Transmission service

[Tiki]

Going to do a preventative trans service at 42k miles. Called the dealer to setup the service and was surprised to hear that they offer either a full flush and replacement or just drop then land and replace the fluid. I’m assuming that either are fine for the remaining drivetrain warranty, but was curious with which option folks have opted for.

 

[mb1500]

Pan drop would be lucky to get 1/2 of the fluid out of the system, if you want all of the fluid to be changed than you’re going to want the flush.

 

[OR VietVet]

At that low of mileage I would also do the flush but have the filter changed as well.

 

[Jason in DLH]

And filter gasket.

That darn little filter gasket....

I’ve always wondered if service techs take the time to do the little things like clean the pan thoroughly, change the filter and gasket, etc... on their own or if you need to specify for it to be done?

 

[Fifty]

I was told the pan gasket is reusable.
Is there a gasket, or o-ring for the filter too?

dang it... another part I need to source

 

[Doubeleive]

my dealer told me they have to pull the pan and change the filter when doing the service, they only offered 1 type of service (full service), no option to just flush-fill etc

 

[Jason in DLH]

I was told the pan gasket is reusable.
Is there a gasket, or o-ring for the filter too?

dang it... another part I need to source

Yeah. Mine came in a kit with the filter and pan gasket, so you might not need to source it. I’d recommend using the actual gasket puller tool though as it’s in there tight! Not sure on the size however. I used a socket to “gently” pound it back in.

 

[Fifty]

Gasket puller tool?

 

[swathdiver]

Gasket puller tool?

A pick.

 

[gat0r]

my SW told me to only do the fluid flush for the 45k severe duty service

then do the filter & then flush @ 90k-100k