2024 10-Speed Transmission Service

[bruceb58]

5 hours ago, Another JR said:

Level when shut down and level when running are different. 

My point is, that's not a drain plug. The difference you will get out while not running or not is negligible. The pan has to be dropped to get the fluid out.

 

Have you ever changed transmission fluid on a 10 speed heavy duty?

Edited September 17, 2024 by bruceb58

[bruceb58]

On 8/31/2024 at 9:04 PM, johnnyquick said:

what pan are you looking at?

https://yourcovers.com/pml-gm-allison-10-speed-10l1000-deep-transmission-pan.html

 

Just have to verify that the exhaust will clear the pan.

[64BAwagon]

My suspicion is that the pan you linked to is for diesel only. 

[bruceb58]

3 hours ago, 64BAwagon said:

My suspicion is that the pan you linked to is for diesel only. 

Need to investigate first. Nobody specifically states that the diesel pan will fit on a gas transmission yet since the 10 speed just came out with the gas engine. The two issues is the pan bolt up itself and the area where the exhaust crosses. It looks like where the exhaust crosses will be fine.

 

I have already had discussions with the people who make the pan and they think it will be fine. By the time I actually need it, they will know for sure.

 

Unfortunately, some other pans, like the PPE, won't fit because of the exhaust crossing.

Edited September 17, 2024 by bruceb58

[lineman1234]

No one seems to want to look under there 4 door. I have verified that on the regular cab the exhaust isnt a problem to be able to drop and remove the pan, without doing anything with the exhaust. 

[bruceb58]

7 hours ago, lineman1234 said:

No one seems to want to look under there 4 door. I have verified that on the regular cab the exhaust isnt a problem to be able to drop and remove the pan, without doing anything with the exhaust. 

It may be possible. I was just stating what the manual says. Yes...I have looked the very first day I brought my truck home 5 months ago.

 

I will try first without moving the exhaust. If it doesn't work, then I disconnect the exhaust from the manifolds an lower it slightly.

Edited September 18, 2024 by bruceb58

[bruceb58]

On 9/17/2024 at 5:42 AM, 64BAwagon said:

My suspicion is that the pan you linked to is for diesel only. 

Just confirmed that the OEM 10 speed pan for both the 6.6L Gas and the 6.6L diesel are identical so the aftermarket pan will bolt up fine. The only issue would be the exhaust pipe clearance so I will need to confirm that.

[64BAwagon]

I havent really dug into this much but I know from previous experience that you can often gain enough clearance by backing the trans mount screws out and jacking the tail of the trans a little. That would be much easier than trying to pull the exhaust loose.  I also need to look at the service directions to see where I want to put the plug. My plan is to drill a small hole in the pan to drain it so it saves me the shower of fluid when I drop the pan. I have to drill a hole for the drain plug anyways so I may as well make it work. 

 

Thanks for posting that. I already have a Superior drain plug kit queued up and ready to install when I service mine. I am only at 6k miles and 16 mo old so I dont really need to drop the pan just yet. I do however have plenty of ULV fluid ready to go. (BTW Rockauto has the best price I have found) 

Edited September 18, 2024 by 64BAwagon

[bruceb58]

1 hour ago, 64BAwagon said:

(BTW Rockauto has the best price I have found) 

Yep...they always have the best price on fluids for the most part...that includes antifreeze too. Exception seems to be motor oil. $4.92/qt for the ULV is a bargain compared to other places.

 

Those Superior drain plug kits are quite pricey for what you get.

 

With the pan I posted, it has an extra 4 quarts of capacity. I am guessing that is a good thing!

Edited September 18, 2024 by bruceb58

[bruceb58]

2 hours ago, 64BAwagon said:

Thanks for posting that. I already have a Superior drain plug kit queued up and ready to install when I service mine.

By queued up, I am assuming you haven't bought it yet.

 

Consider doing something like this instead o drain plug like the Superior. I do MIG and TIG welding and I would go with something like this:

 

https://www.jegs.com/i/JEGS/555/162503/10002/-1?gad_source=1&gclid=Cj0KCQjw9Km3BhDjARIsAGUb4nxWo3i1H2xzXwfvlPYdmsxI4NAikFR5XUhMBO86ikDEp2FiIJOZv_0aAu7AEALw_wcB

[64BAwagon]

I considered that style of plug but I think the pan is aluminum since its non magnetic. I already bought the Superior kit and my plan was to tack the inner nut to the barrel in order to prevent it from ever coming lose. I have a brass crush washer for the outside. 

I am not concerned about the extra capacity although its never a bad thing. On a recent 200 mile trip in upper 80's weather my trans never went over 176 degrees towing my fifth wheel with a mix of interstate and stop and go city. 

[bruceb58]

3 hours ago, 64BAwagon said:

I considered that style of plug but I think the pan is aluminum since its non magnetic.

You are correct, it's aluminum. Just checked it. Sure looks steel!

 

They do make aluminum weldable plugs.

 

I have heard horror stories of those things leaking. Make sure you tighten with the exact torque using a torque wrench when installing. 

 

In other news. I sent PPE an email regarding when they will come out with a pan to accommodate the 6.6L gas version. They said 6 to 8 months. I really like their pans.

 

The highest I have seen my transmission go is 201°F towing my trailer up a steep hill in stop and go traffic in Sequoia NP up to the ranger station. Since my Ford F-150 that uses the same ULV fluid normally ran at 205°F. not at all concerned about temp.

Edited September 19, 2024 by bruceb58

[64BAwagon]

If my PC wasnt on its last legs I would post a pic of the Dash and scangage from this last pull. I dont have a before and after but I gotta believe that heat taping the exhaust as it crossed under the pan had to help some. I believe I read somewhere like a service bulletin that the thermostat cut in on that trans was 176 degrees. Finally GM is taking cooling systems seriously. It doesnt show the ambient temp but it was in the upper 80's   coolant temp 203, oil temp 221, trans temp 176, Oil PSI 46.   64 MPH pulling over 12K  I believe this is I-94 East of Lansing MI, relatively flat by most standards. 

Edited September 19, 2024 by 64BAwagon

[AndrewF]

1 hour ago, bruceb58 said:

You are correct, it's aluminum. Just checked it. Sure looks steel!

 

They do make aluminum weldable plugs.

 

I have heard horror stories of those things leaking. Make sure you tighten with the exact torque using a torque wrench when installing. 

 

In other news. I sent PPE an email regarding when they will come out with a pan to accommodate the 6.6L gas version. They said 6 to 8 months. I really like their pans.

 

The highest I have seen my transmission go is 201°F towing my trailer up a steep hill in stop and go traffic in Sequoia NP up to the ranger station. Since my Ford F-150 that uses the same ULV fluid normally ran at 205°F. not at all concerned about temp.

I thought the gas/diesel version pans were the same?  Or do you mean the PPE pan won't fit gas trucks due to the extra capacity and exhaust routing?

[bruceb58]

1 hour ago, AndrewF said:

I thought the gas/diesel version pans were the same?  Or do you mean the PPE pan won't fit gas trucks due to the extra capacity and exhaust routing?

The OEM ones are the same but PPE designed the one for the diesel to not have the recess for the exhaust pipe running across it.

 

https://ppepower.com/collections/transmission-pans/products/gm-6-6l-duramax-10l1000-transmission-deep-transmission-pan-gm-allison-10l1000-heavy-duty-cast#gallery-1

 

Edited September 19, 2024 by bruceb58