Oil/tranny fluid change

hanko wrote:

Tachdriver wrote:
Hate to add to the list but if you do the tranny, why not the differential?

Hell, might as well get new tires and a paint job too

Allready have paint and tires.
I think I'm gonna pop all the windows out and re seal them and change all my exterior lights to led. Oh allready did that.
Maybe new carpet granite floors and a flat screen tv. Oh what the hell I already did that too. Maybe all new batteries change the fuel filters and anti freeze filter. Wait wait did that too. Ok new couch and ero chair. Forgot allready ordered that from Brad and Hall and waiting for delivery.
Seriously I think I'm gonna leave the trans fluid alone. Change the oil on our next heat wave and enjoy a few weeks away. I know these Heui pumps like fresh clean oil and don't feel like having to replace one along with injectors.

I drain my both oil and transmission fluid when the engine is cold. It takes the engine oil maybe a half hour or so to stop dripping.

The Allison 1000 transmission will drain about one extra quart after sitting a week without running.

The only problem I have run into is loosening the oil filter if the engine is cold.

I've been doing it that way for ten years now.

Mike,

It is really not a matter of do or don't do it cold/warmed up in place-- i.e. no "black vs white". More shades of gray.

Yes it is BETTER to have the oil up to operating temperature, but the world will not end of it is changed cold. And, yes this happens at dealers, but that does NOT make it the best way.

Personally I change engine, transmission oil bath front axle and rear axle only after driving, but if I could only change it now where it sits or run it way too long on old oil, particularly with HEUI pump, I would also change it now.

As a retired mechanic I change mine after it sits overnight everything has drained down and easier to work on. I'm north of you in Cromwell and waiting for the snow to melt enough to get the cover off and start ripping out carpet to put in laminate flooring.

Well just for the heck of it I called Allison and talked to a tech there. He said it does not make a difference weather the trans fluid is hot,warm or cold it will just take longer to drain. I told him my situation and said if I would like it to drain faster I could start engine and put trans in drive for five min. or so to let the torque converter heat up the fluid a little.

Thanks for the follow up. Maybe 30 years ago it was a wise idea to get everything nice and hot prior to draining, but things have come a long ways since then. 10w40 SD code oil would come out like molasses, not true with the current SG code. Almost all oils are either synthetic or a blend making them flow much faster.

Put an electric heater on high next to the oil pan/s. that should get it warm enough for a faster drain.

Remember to check your muffler bearings!

Assuming you are going somewhere warm, like the south, I would just check the levels and call it good then change it at my destination.

a 1000 miles more isn't going to matter

Im just going to repeat what another member said.

ITS SYNTHETIC OILS RIGHT?

If its synthetic, that stuff doesnt care about hot/cold, its always thin and easily drained regardless of weather, AND doing it cold saves you from pumping all the******back up into the engine/trans.