Need help, my 2004 Lesabre shifts hard.

[BuickGirlFromMars]

Is that a transmission filter? What happened? Also your carpenter's framing square is very rusty.

Yes its been rusty since before I was alive I believe

and the filter I was requested to open up a duralast filter to see how it is on the inside

 

[lbear]

View attachment 37962

Filter looks decent but I am no expert on trans filter membranes.

 

[lbear]

Loctite 243 is more oil resistant that 242, it's basically the upgraded version of 242.

 

[lbear]

Left is AC Delco filter and right is Wix filter. The Wix housing neck is too big and will not fit into transmission. The DuraLast fit as did the AC Delco.

Other than that they appear to be the same except the fluid entry is shaped differently on the 2 filters.

 

[lbear]

BUT if you’re going back in, I rEALLY recommend just using your new part AND the clamp. Your concern about the new part will be fixed by the clamp and the new part will serve where your old one could eventually fail even if it just leaked, that adds up over time.
If you are gonna wait on the clamp I would also get a gm brand filter. Dura lady has the chance to be cheap bs or work good but I’ve heard horror stories On cheap filters like those inside. Like if you opened it. I can personally cut open a 440t4 durañast filter if you want. I have it from my first car, never got to it. It’s the same filter.

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I assume on that part, you remove the clip portion first, and then pull the metal tube out of the hole? Then reverse the order when installing?

 

[BuickGirlFromMars]

I assume on that part, you remove the clip portion first, and then pull the metal tube out of the hole? Then reverse the order when installing?

yes

 

[lbear]

The clamp has around 3 threads so not a huge amount of hold or clamping force but I guess it's enough to hold it in place. The blue loctite should help it from loosening.

 

[lbear]

Drained the trans fluid (nice to do with new Dorman drain plug), dropped the pan, installed the AC Delco diff line, installed the Sonnax line clamp. Also swapped out the Duralast filter for AC Delco.

I used Blue Loctite 243 on the threads for the Sonnax clamp. I poured the trans fluid into a clean bucket and reused it since it was brand new (changed it out last weekend).






The old diff line rubber appeared to be in good condition, I even bent it and checked for any cracks but it looked good. I could have easily gotten another 20k+ miles out of it 😉

The new AC Delco diff line seemed to be about 1/8 longer on the one end. Didn't cause any issues but just something I noticed.

 

[BuickGirlFromMars]

Drained the trans fluid (nice to do with new Dorman drain plug), dropped the pan, installed the AC Delco diff line, installed the Sonnax line clamp. Also swapped out the Duralast filter for AC Delco.

I used Blue Loctite 243 on the threads for the Sonnax clamp. I poured the trans fluid into a clean bucket and reused it since it was brand new (changed it out last weekend).


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The old diff line rubber appeared to be in good condition, I even bent it and checked for any cracks but it looked good. I could have easily gotten another 20k+ miles out of it 😉

The new AC Delco diff line seemed to be about 1/8 longer on the one end. Didn't cause any issues but just something I noticed.

View attachment 38029

probably to help it seat better in the accumulator thingy but good work you done well young padawan

 

[2007LucerneCXL]

Great details, if everything regarding installation, parts and photos could be saved as a Sticky it would be handy for others to follow.

 

[lbear]

probably to help it seat better in the accumulator thingy but good work you done well young padawan

Thanks! Just hoping the new AC Delco line will not fail due to poor quality on the hose portion😉

I know a few people who have the 4T60 or 4T65 transmissions but none of them ever did the line change. How "common" was it for that OEM hose line to fail and at what mileage? Like I mentioned, mine with 88k miles, the hose was still in good shape. No issues with cracks or signs of failure.

 

[lbear]

probably to help it seat better in the accumulator thingy but good work you done well young padawan

What does that line actually do? It states it's a "differential line" so does it cool off a gear using trans fluid or does it actually apply some type of clutch pack? What kind of line pressure does it see?

 

[BuickGirlFromMars]

What does that line actually do? It states it's a "differential line" so does it cool off a gear using trans fluid or does it actually apply some type of clutch pack? What kind of line pressure does it see?

The differential lube line, is to lubricate the differential. If you think about a rwd vehicle, you have a differential connected to the trans by driveshaft. In a FWD transmission, you have the differentail attachecd to it as the long part (well at least at the end of the long part) the final drive is the same as the rear ratio for a rear end, just different terminology based on how its in the trans case
so without having a separate sump of gear oil, it uses ATF 🙂




you may be able tgo see the vast difference between these two, the top one is the 4t65e, the bottom is the 4t80e

 

[lbear]

The differential lube line, is to lubricate the differential. If you think about a rwd vehicle, you have a differential connected to the trans by driveshaft. In a FWD transmission, you have the differentail attachecd to it as the long part (well at least at the end of the long part) the final drive is the same as the rear ratio for a rear end, just different terminology based on how its in the trans case
so without having a separate sump of gear oil, it uses ATF 🙂

I see. Thanks for the explanation. I wonder how much psi of fluid is being pushing through that line? Maybe 20-30 psi? I don't see it needing a lot of high pressure but just a steady stream of trans fluid to keep it cool.

 

[BuickGirlFromMars]

I see. Thanks for the explanation. I wonder how much psi of fluid is being pushing through that line? Maybe 20-30 psi? I don't see it needing a lot of high pressure but just a steady stream of trans fluid to keep it cool.

high pressure high volume, the volume is the important part, but I could find the lube flow description if you want but Its pressurized all right

The pump i believe picks up the pan contents and then pumps into the side cover and then the lube tube gets it from there i think

 

[John Canon]

high pressure high volume, the volume is the important part, but I could find the lube flow description if you want but Its pressurized all right

The pump i believe picks up the pan contents and then pumps into the side cover and then the lube tube gets it from there i think

The differential gears are straight-cut bevel gears, not hypoid like standalone diffs. ATF does not have the additives to protect the sliding motion of hypoid gears, so I'm guessing that lots of volume and lots of pressure for those bevel gears.
The ATF has to get there somehow.

 

[BuickGirlFromMars]

The differential gears are straight-cut bevel gears, not hypoid like standalone diffs. ATF does not have the additives to protect the sliding motion of hypoid gears, so I'm guessing that lots of volume and lots of pressure for those bevel gears.
The ATF has to get there somehow.

View attachment 38069

The pipe that i have been trying to show yall so you dont blow yours up and get granola in your pan

 

[lbear]

The pipe that i have been trying to show yall so you dont blow yours up and get granola in your pan

I installed the new pipe hose and clamp over the weekend, so I should be good, right? Kind of a double suspender and belt approach.

I wonder how quick would the diff gear would fail once the hose was compromised? Is it within a few miles or 100s of miles?

 

[John Canon]

Glass half full.

 

[BuickGirlFromMars]

I installed the new pipe hose and clamp over the weekend, so I should be good, right? Kind of a double suspender and belt approach.

I wonder how quick would the diff gear would fail once the hose was compromised? Is it within a few miles or 100s of miles?

Im not sure but at some point after getting pushed out of the housing or blocked by debris I think my transmission made money noise and left me granola for a snack