How many miles do you got on it?

 

96k so definitely due for a fluid change

 

I think he's coming up on 70-80k

Nice to hear Omac! She'll be glad to get it done!

 

Did the transmission service today. Took about an hour taking my time. The worst part was draining the fluid. No way to do it without some spilling. The gasket was dried up and stuck to the pan. I also found both screens had fallen down onto the pan. The gromets shrunk and weren't pliable anymore. The small drain bolt inside the transmission was a pain to get back in. But overall was about what I was expecting. Should be good for another 100k. Took it for a drive and rechecked the fluid level. Shifts smooth. Runs great.

 

Just about to do the same thing -- ordered the A/C Delco kit from Rock Auto for about $18, and bought 12 quarts of Dexron VI synthetic. What socket type is used on the drain plug that hides underneath/beside the "dog leg" looking filter screen?

Thanks for posting

 

Thanks. The inside bolt is an 11mm. It comes out easy but because there is a wire harness right next to it, makes it a little difficult to get threaded back in. The dripping fluid doesn't help either. I got the kit and fluid from Amazon I have prime so had them in 2 days. You only need 8 quarts thats all that you can drain. Its about 4 an a half in the pan and 3 an a half when you remove the drain bolt. When you add the fluid. Put 4 quarts in start the car and shift into all the gears. Then add the rest. Mine took exactly 8 quarts. But add 7 and check the fluid with the car warmed up running in park. You don't want to over fill it.

 

Nice Job. I want to do the pan drop sometime soon also. I bought my DTS with 80K miles and the fluid was a bit dirty. I used the transmission cooler line trick and drained out 6Qts. The line started sputtering after 6ts so I stopped.

 

These are good transmissions. haven't heard about a lot of problems with them. After changing the screens and fluid I noticed the trans shift into gear a little smoother. It was already smooth but now I can barely feel the trans go into reverse and drive.

 

Generally these will last fairly long if you maintain them. Personally Id wanna change the fluid every 30K miles.

However one person on this forum who changed the fluids often, had the 4th gear band go out at 230K Miles. Even then thats a pretty long time.

 

my 08 dts just was flushed at the dealer. I asked them how would they do? they said that they would do a flush. I accepted because I don't want to bother much.

But guys, all we know the flush will get out all of trans fluid, but I don't understand, as long as they cannot touch the lowest area fluid, how can people get out all of fluid???????????


I just do a flush on brake at the dealer, too. because, I cannot do the bleed. Again, I don't understand why the flush is getting all fluid.

 

I don't like just flushing out the fluid. That doesn't remove debris that is on the magnet or the screens. It is better than doing nothing.

 

I agree with you. In my opinion, we flush once, then drop pan to replace screens and gasket once. Is it bad to flush all material out, but if the trans works just like new. Material inside left will be bad for the trans also. So, I plan next time I will drop the pan.


I agreed with guy at the dealer because The trans was completely rebuild not long( from last onwer).

 

 

Thank you, see my note about the mangled piece of plastic I found under the dogleg filter.

https://www.cadillacforums.com/foru...ough-2012/1084322-transmission-fliter-change-can-you-identify.html#post17723648

 

Well, I tackled my 2009 DTS 99,000k tranny yesterday with success. I dropped the pan, and the oil was brownish red, clean looking, no metal shavings, removed the bolt from the side pan and let that drain also, the magnet was very descent, it had a little metal dust but not bad, the 2 screens were not really dirty. I cleaned up the pan, magnet, and screens, installed the 11mm bolt back in the side tank, installed a new gasket, snug tightened the 16, 10mm bolts, (they seem to snug at a certain torque on their own where you know not to go much tighter)
I added 8 quarts. Let the car warm up, went through all gears and checked for leaks and checked the fluid level. It was low. I added 3 more quarts which brought it to the "hot" range on the dipstick (about the middle of the "hot" range)
8qts + 3qts = 11qts so the rest was in the converter, right?
I drove it about an hour. Upon shifting into drive it was even smother than before. Brought it up to about 85 mph for a lil while. Downshifts and upshifts well.
This was the first time I ever serviced a transmission's fluid and filter/screens. It feels good to know what you want done, is done, without wondering did the mechanic do it?, or did he just say he did it?
Thanks goes out to the members of Cadillac Forums for their guidance and comments

 

May I ask which screen/gasket kit you used for the job?

 

Yup, I reused the 2 screens, but replaced the gasket, just to be more comfortable.

 

Unless they changed the 4T80E from my '03, the screen and gasket are reusable.

 

The screens and gasket are reusable but I bought the kit before knowing that so I installed it. The kit I used is More Information for ACDELCO TF305 $16.63 AC Delco

 

Uh Oh, I over-filled my tranny fluid .... I checked it hot after driving it was over the full hot range. I wanna ask, can I use a turkey baster to suck out the fluid from the fill reservoir to reduce the overfill while the engine is on or best to jack up car and losen 3 bolts or so to let the overfill drain from pan? Please Omac and SubMariner409 don't beat me up too bad. LOL.
Thanks.

 

Uh Oh, I filled my tranny fluid reservoir over the full hot range....... now I have not drove a lot but when I checked it hot after driving it was over the hot range.....clear red, but still over. I wanna ask, can I use a turkey baster to suck out the fluid from the fill reservoir to reduce the overfill while the engine is on or best to jack up car and losen 3 bolts or so to let the overfill drain from pan? Please Omac and SubMariner409 don't beat me up too bad. LOL.
Thanks.

Yupp! A turkey baster is fine. Use gloves because that area of the engine gets hot.

 

Wow, I looked at an animation on YTube and saw something that showed the tranny oil needing air to also get in a certain compartment, so by overfilling it reduces the air accessing that compartment. If I understood it correctly, is this why overfilling is no good? Also I must do it while engine is on and hot being the tranny is a dry sump system, correct?
I believe I overfilled it because I didnt really let the engine and tranny get truly hot, getting a false tranny level reading.
Thanks Much RomoRock3r. My humor at Omac and SubMariner409 was based on me knowing better to overfill the tranny pan...or should have known better.Silly me.

 

Also I must do it while engine is on and hot being the tranny is a dry sump system, correct?

Correct.

 

Sounds like it will be niiiice and easy peazy. Thanks Ranger.

 

You should see this with the engine off for over 5 minutes - with the engine running there should be red fluid in the neck and some bubbles - the dry sump transmission scavenge pumps move more fluid than the pressure pump so the pan stays mostly dry while the scavenge pumps move a bit of air along with the drain fluid. Normal.

 

Hey guys.....I turkey basted 17 ounces out while after engine was idling for half hour. Shifted to all gears then checked level. Looks perfectly in range. 🙏👍 Turkey baster worked perfectly Ranger. 👍 I really appreciate the talents of the members of CadillacForums. SubMariner409 I just kept the engine on and siphoned the fluid out with the turkey baster. Perfect. Thanks SubM and Ranger. 👍

 

Just for the record, I do NOT like the looks of that bottle of transmission fluid.

Here's what it should look like - left cup.- new, like yours -

Graphic from a service manual -

 

SubMariner409 its really new and red. I dont know why my pic appears darker. But I surely changed the fluid with synthetic Dexron VI.👍 It is definitely clearer than what was drained.

 

SubMariner409 its really new and red. I dont know why my pic appears darker.

That picture did not look good. Probably just the lighting.

 

Glad it worked out for you. Sh** happens lol. I added the same amount I removed from the transmission. Checked the level and added a little more. That helps prevent overfilling which in this case wasn't that bad but can end up being a pita.

 

Yes...I hear ya Omac.

 

It was sundown..... I do see it. It does look dark for sure!!!! I took the pic from the side of the clear bottle at night with flash on phone. BUT for sure I changed my tranny oil with fresh new Dexron VI. Im gonna take that same oil in that bottle and pour it in a cup in day light and picture it from the side and from top and see if I see a difference. But again, it is fresh.
Also, the leak I have been monitoring, I put a 5 foot piece of cardboard under that area and I dont see any leaks on it. hmmmmm. Maybe cause I siphoned the antifreeze and tranny fluid to their proper levels? Letting it run for 30 minutes, and after turning off engine and looking at cardboard the next day, still clean. You know things have a tendency to leak once pressure is not pushing through an opening. (when engine is off)

EDIT> These are a couple pics from that same tranny fluid I siphoned out a few weeks back. It appears lighter colored in the bottle cap.