Changing the 3 speed auto fluid anything I should look for.

[Zymurgy]

I have a '66 300 with a 3 speed auto. It has sat for 30 years and I am changing all the fluids among other things. The transmission fluid is leaking from the pan. I know there is an interior filter is there anything else I should look at while I have the pan off. There where no issues previously with the 62,0000 mile transmission.

 

[1978 NYB]

Check and see what's in the bottom of the txsm pan. Don't use any permatex or gasket sealer on the txsm pan gasket.

 

[commando1]

Are you doing a total transmission flush or just replacing the quart or so you lose when you drop the pan?

(Sent using Forum Runner)

 

[Zymurgy]

Are you doing a total transmission flush or just replacing the quart or so you lose when you drop the pan?

(Sent using Forum Runner)

Thank you for asking the question because I clearly don't know how to flush the system. I thought I would go ahead and put all new fluids in the car.

I have preformed this task on my 2003 Sprinter Van. I lost most of the fluid when I removed the pan and then there was an internal drain that the engine needed rotated to remove the last couple of quarts. Does the 300 have an internal drain?

 

[commando1]

Thank you for asking the question because I clearly don't know how to flush the system. I

Just dropping the pan is useless.
You can do a total flush yourself.
Give it a shot.

 

[Zymurgy]

Just dropping the pan is useless.
You can do a total flush yourself.
Give it a shot.

Your the man thanks!

 

[Greg B.]

That video is a laugh... a 1-hour job? Yeah, suuuuuure.

Drain plug on a tranny? Not on mine. So you get to drop the pan, find a new gasket, and oh, I see he didn't change the filter at all. Hmmm. Of course, maybe changing the fluid every 30,000km as he suggests obviates the need for filter changes? I don't think so. Then he finds the proper line for the trans cooler and uses that to somehow (not sure how) flush the old fluid from the converter. I can just imagine on one of our old cars not being able to get the fitting out of the trans cooler, breaking the hard line, damaging the cooler, whatever. Perhaps I'm scarred from changing the rad on an Olds a few years ago and never being able to get the trans line to stop leaking after I installed the new rad

I figure the old beast would be laid up for at least a week, maybe more. :rant:

 

[polara71]

That video is a laugh... a 1-hour job? Yeah, suuuuuure.

Then I'm not even going to waste the time to view it

 

[commando1]

That video is a laugh... a 1-hour job? Yeah, suuuuuure.

The purpose of the link was to show there a ton of videos on YouTube for the procedure.
Don't like this one, click on another....
I'm not here to sort out the best and the worse.

 

[thrashingcows]

I disagree with Stan about dropping the pan as being useless. It most definitely is the right thing to do. You need to drop the pan so you can change the filter. I like to get a pan gasket and filter kit for a Dodge A518...same filter and gasket, but the gasket will be a more modern composite...not the old cork one you'd probably get when ordering a filter kit for a old 727.

You can remove the inspection plate by the torque converter and then use a big screw driver to rotate the torque convert. Look for a small drain plug...sometimes you will find one...but most times not.

If you don't find a drain plug for the torque converter I would still replace the filter, top up with new fluid and go. Then in 6 months do this again. And then again in another 6 months. By this time you will have cycled out all the old fluid.

I have never liked the idea of flushing a tranny like they show in some of those videos.

 

[detmatt]

Might as well check the band adjustments while you're in there too. 1st reverse adjuster is inside the case while 2nd to 3rd is outside. Get yourself a manual for your car if you don't already have one. You will find the procedure for this in the manual.

 

[commando1]

Brian brought up a couple of good points.
1. I should have said that after the flush you still have to drop the pan for a new filter and a gasket. I didn't mention it because I thought it was assumed.
2. Any shop that you trust that has a power flusher is not a bad deal. My only concern is I have heard more than once, of the fast-oil change joints either charging for a full flush & filter and not actually doing it, a/o their "techs" (hahahaha) screwing it up themselves.
3. It's easy for me to say DIY because I have a lift. Doing it on the ground is a big PITA and can easily get very messy and turn your driveway into a haz-mat site. Plus I'm cheap and I have the luxury of lots of time.

 

[1978 NYB]

I never trust a shop to change or flush any fluids...ever! I worked at AAP after retiring from the Army and you would not believe how many times the Jiffy Lube type of buisness would come in and buy 25 (at a time) of the emergency expandable drain plugs! Those 18 years old getting $8 an hour are real proficient at cross threading oil pans.