[Omac]

I recently checked my trans fluid. Its original so I want to change out the 2 filters and drain about 8 quarts. I ordered the ac delco filters and pan gasket as a kit and 8 quarts of the ac delco synthetic fluid that replaces the original fluid. The new fluid is recommended for our transmissions. I'll take pictures as I do it and update the installation.

 

[eric15178]

How many miles do you got on it?

 

[CadillacLuke24]

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

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

 

[Omac]

How many miles do you got on it?

96k so definitely due for a fluid change

 

[Omac]

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.

 

[goodfellow]

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

 

[Omac]

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.

 

[RomoRock3r]

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.

 

[Omac]

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.

 

[RomoRock3r]

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.

 

[waodiennha]

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.

 

[Omac]

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.

 

[waodiennha]

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).

 

[mtr18103]

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.

I am tackling this job this weekend? I have 100K miles and my car is hesitating when shifting into reverse, but only when cold. Hoping this helps it.
What inside bolt/drain plug are you talking about? Is this a plug that holds more fluid behind it? Thank you in advance

 

[Omac]

I am tackling this job this weekend? I have 100K miles and my car is hesitating when shifting into reverse, but only when cold. Hoping this helps it.
What inside bolt/drain plug are you talking about? Is this a plug that holds more fluid behind it? Thank you in advance

Yes it holds more fluid. It's located by the driver side front of the transmission Look for a wire connector inside it's near that. Hope it goes well for you. The new filter and fluid should help with the shifts.

 

[danog]

 

[mtr18103]

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

https://www.cadillacforums.com/foru...ter-change-can-you-identify.html#post17723648

 

[Hittzman]

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

 

[CanadianDTS]

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

 

[Ranger]

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