Just curious, what is the core charge for the transmission?
A core charge is what you would pay if you choose not to send your old transmission back.
10L80 - filled transmission at wrong temp???
- Thread starter jyi786
- Start date
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A core charge is what you would pay if you choose not to send your old transmission back.
The core charge was $3k.
GM considers those units 'critical cores' so the 3k core charge ensures nobody decides to keep their old 10-speed transmission.
Just curious did you check around at junkyards for a used one? It's a couple hundred miles away from me but a quick check on car-part.com for your 19 there was one with like 11k miles on it for a little over $3k. Some even come with warranties.
I did initially, but I just don't want to go that route. Most likely, something is going to be wrong with it in the near future, and I'd go through this all over again.
BlaineBug
Full Access Member
I believe the Ford 10 speed has an issue with some sort of a bushing and/or drum "sliding" and blocking some fluid ports resulting in a harsh and/or delayed shift.
Seamus
Full Access Member
My dealer said the exact same thing. Never had a bad 10 speed behind a gas motor. All they have ever done is fluid and filters. This is a very busy dealer doing tons of warranty work. They had over 7 new trucks in there with lifters and bottom ends just the day I was there. Warned me not to buy anything over aa 2020.
Its alot of money but thats a lot of warranty thats good anywhere in the USA. I think you went the right route.
BlaineBug
Full Access Member
This afternoon I inspected a 2018 Sierra Denali (8L90) with a warranty claim for an apparent shudder with less than 58,000 miles. It seemed to me that when the shudder was apparent than the RPMs would increase or flare and then drop off. It also seemed that the shudder was less apparent or non-existent when in tow-haul mode.
Seamus
Full Access Member
This is a very common known issue. They try to get it done with a flush but that only works for half the people. There is no flushing a TC. The issue is the torque converter. The aftermarket has improved TC's that are an upgrade and solution. I had a 2017 with the 8 speed and loved it. If I were buying a clean nice truck 8 speed, I'd do a flush with new fluid then pull trans and put a new aftermarket TC, then new fluid again and move on. My 2015 Denali had TC replaced after flush didnt work. My 2017 never had the issue but traded before 40K. My 2 10 speeds have been fantastic.
BlaineBug
Full Access Member
It was a nice riding truck. Suspension seemed stiffer than my 2019 Yukon SLT, which I actually prefer as I feel my SLT rides too soft, yet surprised as the Denali has Magneride.
Agreed. This was my experience before mine went down the drain. Again, its failure was mostly my fault because I did not possess the knowledge nor had the tools to do the transmission fluid change. As stated earlier, my new one will get a full service (transmission fluid/filter) every 30k miles, no exceptions.
Seamus
Full Access Member
IDK if it was you maybe just bad luck on that one. My tech friend said they dont get crazy with the temp when they do a filter and fluid. Just start, warm and overflow then cap it off he said. He also said he changes his every 30-40K.
Update: they've had my transmission since the 8th, even though I've been reaching out to them constantly via email and phone. 
I just dropped it off with them, and told them to check the radiator, cooler lines (as they insisted there was nothing wrong with it), but I have an email thread stating such, so if there is, they'll be liable.
They'll look at the radiator, cooler lines, replace the transmission, and check for another leak which is there (oil or diff fluid) and rectify it.
I'll know something later this week before I go on travel.
I just dropped it off with them, and told them to check the radiator, cooler lines (as they insisted there was nothing wrong with it), but I have an email thread stating such, so if there is, they'll be liable.They'll look at the radiator, cooler lines, replace the transmission, and check for another leak which is there (oil or diff fluid) and rectify it.
I'll know something later this week before I go on travel.
Update: they pressure tested the radiator and transmission cooler, and found no fault, leaks, or any blockages in the cooling system. They recommended to leave the radiator alone. I have it in writing, so if anything happens, it will be on them.
Transmission was pulled, and while they are at it, they are also addressing an annoying oil leak I had. Their initial thought was that it was the rear main seal. They just confirmed it is not, and that it was actually the oil pan gasket. They are going to change that, and install the new transmission.
This will most likely be done and since I will be gone for 2 weeks, will have to update then. Until then, that's what we've got going on.
Transmission was pulled, and while they are at it, they are also addressing an annoying oil leak I had. Their initial thought was that it was the rear main seal. They just confirmed it is not, and that it was actually the oil pan gasket. They are going to change that, and install the new transmission.
This will most likely be done and since I will be gone for 2 weeks, will have to update then. Until then, that's what we've got going on.
I'd clarify this with them, preferrably in writing, that if your radiator fails in some way after the vehicle gets back on the road, they will warranty anything that is damaged/destroyed as a result of the radiator leaking or failing in some way. If there is some sort of warranty on that pressure test itself, how long it lasts.
Ive not seen or heard of a warranty or guarantee based solely on the test/ecal of a pre-existing part, shops only warranty a part they replace.
Perhaps they have an opportunity to clarify, but I'd definitely ask if it's not addressed at the time you pick up the vehicle.
Final update:
Got my truck back yesterday. Engine oil leak was fixed, radiator flushed, trans cooler lines flushed and checked for leaks, and new transmission installed.
As for the issue: shuddering is completely eliminated. New transmission shifts slightly hard very rarely, but that's most likely because it needs to learn/adapt to my driving style. No more shuddering to speak of. All gear shifts up or down are as smooth as can be. Dealership confirmed in writing that if the transmission would fail due to the radiator, it would be covered under warranty, but not the radiator (which is to be expected).
All is well. I guess I'll never know what failed in the old transmission, but all I can do is look forward to the future, and ensure that this doesn't happen again. Transmission will be serviced dutifully at every 30k miles.
Got my truck back yesterday. Engine oil leak was fixed, radiator flushed, trans cooler lines flushed and checked for leaks, and new transmission installed.
As for the issue: shuddering is completely eliminated. New transmission shifts slightly hard very rarely, but that's most likely because it needs to learn/adapt to my driving style. No more shuddering to speak of. All gear shifts up or down are as smooth as can be. Dealership confirmed in writing that if the transmission would fail due to the radiator, it would be covered under warranty, but not the radiator (which is to be expected).
All is well. I guess I'll never know what failed in the old transmission, but all I can do is look forward to the future, and ensure that this doesn't happen again. Transmission will be serviced dutifully at every 30k miles.
BlaineBug
Full Access Member
I just inspected a 2019 Yukon Denali last week with a 10 speed transmission pump whine (cavitation) and simultaneous 6.2 liter lifter failure at only 69,000 miles
That's just crazy. I guess it was never maintained.I just inspected a 2019 Yukon Denali last week with a 10 speed transmission pump whine (cavitation) and simultaneous 6.2 liter lifter failure at only 69,000 miles
BlaineBug
Full Access Member
Not a spec of rust on it, very clean body and interior.
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