2014 Silverado Transmission

Hi all. I have a gas 2014 Silverado 2500 that recently started acting up. I’m pretty sure it’s the transmission as a couple times going up hills it’s downshifted and slipped and at certain speeds it almost seems like the motor is missing but I believe it is a surging feeling related to the transmission. Does anyone know what transmissions these trucks have in them or got one done and remember roughly what the cost was? The truck is coming up on 200k miles and has done nothing but pull a huge ice castle and a large boat so I’m sure it was on borrowed time anyways.

1st thing is there any codes stored? Check engine light on?
Plugs, ign. coils, and wires been changed/checked? All these items can make you think transmission is acting up. Transmission been serviced regularly?
Need way more info to give an opinion.

The check engine light isn’t on which seemed odd to me. The only time it acts up is when it’s in 5th or 6th gear. When I was driving it earlier the temp was at 163. When it’s in 6th gear you can hit the gas and the rpm’s go up and there’s no acceleration. The fluid isn’t red by any means but it’s clear enough to read the dip stick through. Transmission has never been serviced.

walleyesforme wrote:

Transmission has never been serviced.

Ouch!!

This spring I had a 2015 1500 6-speed tranny rebuilt plus a new torque converter and it was ~$7,500-$8,000.

Might be time to go truck shopping. Yikes!

6800 for my 2015 yukon at the dealer.

Imo no way I’m sticking that dough in a 200000mile vehicle. Mine had 164000 and was really crunching the numbers to fix or not

That truck should have a heavier duty trans than what both you guys had done. If you are close enough to me Ham Lake, we can look at it for you. It’s possible it is not the transmission, but certainly wouldn’t rule it out. You say never on a service, how many miles are we talking without a service?

John Rasmussen wrote:

That truck should have a heavier duty trans than what both you guys had done. If you are close enough to me Ham Lake, we can look at it for you. It’s possible it is not the transmission, but certainly wouldn’t rule it out. You say never on a service, how many miles are we talking without a service?

Sounds like 200k lol

Yes that is correct. I guess it’s just one of those things I’ve never done to a vehicle. Guess I have been lucky. All have went well over 200k miles without any issues. This is a first for me having anything like this happen.

John Rasmussen wrote:

That truck should have a heavier duty trans than what both you guys had done. If you are close enough to me Ham Lake, we can look at it for you. It’s possible it is not the transmission, but certainly wouldn’t rule it out. You say never on a service, how many miles are we talking without a service?

Thanks for the offer but the truck is at the cabin in International Falls.

walleyesforme wrote:

Yes that is correct. I guess it’s just one of those things I’ve never done to a vehicle. Guess I have been lucky. All have went well over 200k miles without any issues. This is a first for me having anything like this happen.

You have definitely been lucky.
We see those GM 6spds fail regularly under 100k. They’re about $7,000 installed at my shop.

This is a HD not a half ton. Different transmission.

6l80/6l90.
Seen them both fail prior to 100k more than once.
It’s more common than not on the 6l80, 90’s are better but still have chronic issues.

walleyesforme wrote:

Thanks for the offer but the truck is at the cabin in International Falls.

Would at least be worth it to have someone take a look. There are other things that could give you symptoms.

John Rasmussen wrote:

<div class=”d4p-bbt-quote-title”>walleyesforme wrote:</div>
Thanks for the offer but the truck is at the cabin in International Falls.

Would at least be worth it to have someone take a look. There are other things that could give you symptoms.

Thanks. One of my friends did have something similar happen and he said it was some kind of programming issue but I’m probably not that lucky. I’ll have to try to limp it home and get it in and go from there.

4386. Retail price

Talked to a guy at Hermantown transmission and it seemed like he really knew what he was talking about. Said they do a ton of them and when they rebuild them they fix all the weak links and reflash them so it should outlast the truck. Right around $5500. Probably worth getting fixed for that price I guess.

walleyesforme wrote:

Talked to a guy at Hermantown transmission and it seemed like he really knew what he was talking about. Said they do a ton of them and when they rebuild them they fix all the weak links and reflash them so it should outlast the truck. Right around $5500. Probably worth getting fixed for that price I guess.

You never serviced the tranny so deduct that from the price of the new tranny. Probably makes it around $4900.

walleyesforme wrote:

Transmission has never been serviced.

For future reference, when you do finally replace the 2014, transmission service is a lot more critical on the new transmissions. I don’t think chances are good that a 10 speed will give you 200k with no maintenance.

Transmission service is the most over looked service on a truck/car. Get a drain and fill at 60k and 100k. Then no problems

TheFamousGrouse wrote:

I don’t think chances are good that a 10 speed will give you 200k with no maintenance.

Mine made it 25k about.

I just blew a transmission on my 2016 Silverado just a few weeks back. Luckily, I purchased (first time ever on a used vehicle, I owe the finance office guy a case of beer for his persistence) the extended warranty covering bumper to bumper and it is all going to be covered. They even found some bad ball joints on the front end and they will be replacing them free of charge as well. I couldn’t believe that didn’t fall under standard wear.

It started failing on the way to Marshall and I somehow managed to get it home on a 5 hour round trip. I could barely get it to the dealership a couple blocks from my home the following morning. I told the transmission specialist, I don’t think I can get it to my office 7 miles down the road. He laughed and hopped in and we only had to turn the corner of the building for him to see what I was talking about.

They had just taken in a 2018 trade in and I have been fortunate to be using that for about 4 weeks now. My truck is still sitting in the lot as of this morning. Can’t wait for them to get it on the lift but I certainly can’t complain as they have saved me a fortune on long term rental costs.

Upon researching, I had discovered that a class action suite has been filed against GM back in April for faulty transmissions on the Silverado and Tahoe years 15-19. Unfortunately that won’t help you out.

The first threads I began reading said the biggest issue was transmissions blowing at 100,000. Wouldn’t you know it. I hit 99,500 on the trip.

My 2018 GMC was stuttering at around 1500 RPM’s around the gear shift point. My guy said have I ever had the transmission service….never but now am at 117K miles. He said that it could be my torque converter lockup is not working, suggested changing the ATF and filter. It wasn’t cheap but the problem went away, better than replacing the torque converter! Although it’s a 10 year old truck, you could buy one for the price of fixing it.

If the 2018 has an 8 speed tranny you should have had the whole system flushed. Its the updated fluid that fixes the shutter.

When you guys say you never “serviced” the trans do you mean you never had fluid/filter changed at all? Yikes.

Highbeeze24 wrote:

They had just taken in a 2018 trade in and I have been fortunate to be using that for about 4 weeks now. My truck is still sitting in the lot as of this morning.

Wonder why its taking so long. For once most GM trannys are readily available.

JEREMY wrote:

Wonder why its taking so long. For once most GM trannys are readily available.

We are still waiting on an 8 spd right now for a 2500 van with a 4.3l. It’s only been like 4 months or more.

The warranty company wanted to send an auditor to verify, at which point they (the warranty company) would be the ones to purchase the new transmission and have it shipped. They had hoped for things to be wrapped up last week, but that obviously hasn’t happened. They told me they would keep me updated and for now, no news is good news based off of the initial conversation. So long as I have a means of transport, I’m OK.

Matt Moen wrote:

When you guys say you never “serviced” the trans do you mean you never had fluid/filter changed at all? Yikes.

Yeah and people wonder why there transmission failed. This is not meant as an attack on anyone here just amazes me how many people don’t do services when there supposed to and think there winning because they did not have to spend money on their vehicle.

My 2016 6L80 failed at 138k with fluid and filter having been done at 95k. about 7k all said and done. The shop I went with also said they would rebuild better than stock, then when it was all said and done, they did not (although they were transparent about it). They installed a new GM trans with a warranty from GM. Sold the truck with 900 miles on that new trans.

6L90 should be stronger for all intents and purposes, as evidenced by your 200k run without service. Not bad tbh. My 2010 6l80 ran 165k without service to no ill effect; I had the fluid and filter changed at 165k and put another 100k on it no problems at all.

Recently got into a 2020 2500HD with 6L90, runs good. Serviced on day 1, at 89k. Will be servicing every 50k, hoping for the best. Price was really good on this unit and I really like the new L8T, else I would’ve bought something older.