Chevy Avalanche Transmission Problems & Cost | 4L60E / 4L80E / 6L80

In its day, the Chevrolet Avalanche was about as American a vehicle as you could get. It was half full-size truck, half SUV, and totally awesome. Granted, most owners probably never lowered the mid-gate and used the truck bed the way it was intended. But hey, at least they still looked cool. And they could backup the looks with one of several powerful V8 engines. In all, the powertrain was pretty much bulletproof, but Chevy Avalanche transmission problems do still occur. So let’s find out what you can do about them.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

Chevy Avalanche Transmission Models

Chevy Avalanche 1500: 4L60E Transmission (Early Models)
Chevy Avalanche 2500: 4L80E Transmission (2500 only)
Chevy Avalanche: 6L80 Transmission (Late Models)

Chevy Avalanche Transmission Replacement Cost Estimate

Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.

Replacement Chevy Avalanche Transmission Prices:

TransmissionStreet Smart TransmissionAutozoneAdvance Auto Parts
4L60E / 4L65E148015071599
4L80E184017891799
6L80 / 6L90229024502480

What are the DTC codes related to Chevy Avalanche transmission problems?

P0717 – Input/Turbine Speed Sensor Circuit No Signal – If the ECU can’t communicate with the input speed sensor, this DTC gets stored.
P0894 – Transmission component slipping – This OBDII trouble one of the gear ratios is not consistent with what the ECU is asking for.
P0756 – Shift Solenoid ‘B’ Performance or Stuck Off – If the ECU saved this code, then a solenoid isn’t working right, or it’s stuck off.
P0741 – Torque Converter Clutch Circuit Performance or Stuck Off – This diagnostic trouble code means the TCC solenoid is not performing according to specification.
P0961 – Pressure control solenoid ‘A’ control circuit range/performance – This code means there is a low voltage condition on a line pressure control solenoid.
P2769 – Torque convertor clutch circuit low – This diagnostic trouble code means the ECU is having a problem with the electrical circuit that controls the TCC solenoid.
P0741 – Torque Converter Clutch Circuit Performance or Stuck Off – This diagnostic trouble code means the TCC solenoid is not performing according to specification.
P0742 – Torque Converter Clutch Circuit Stuck On – If your vehicle has this DTC, then the torque convertor clutch solenoid is most likely stuck in the ‘on’ position.
P0751 – Shift Solenoid ‘A’ Performance or Stuck Off – When you see this DTC, it means the ‘A’ shift solenoid is not working right, or is stuck in the ‘off’ position.
P0752 – Shift Solenoid ‘A’ Stuck On – This diagnostic trouble code means the ‘A’ solenoid is stuck ‘on’.
P0756 – Shift Solenoid ‘B’ Performance or Stuck Off – If the ECU saved this code, then a solenoid isn’t working right, or it’s stuck off.
P0757 – Shift Solenoid ‘B’ Stuck On – If this solenoid gets stuck ‘on’, the ECU will save this code.
P0218 – Transmission over temperature – This diagnostic trouble code is triggered when the gearbox exceeds the maximum allowable temperature.
P0776 – Pressure Control Solenoid ‘B’ Performance or Stuck Off – This diagnostic trouble code means there is a mechanical problem with this solenoid.
P0796 – Pressure Control Solenoid ‘C’ Performance or Stuck Off – If the pressure control solenoid labeled ‘C’ isn’t working correctly, or it gets stuck in the ‘On’ position, this DTC will be saved.
P2714 – Pressure control solenoid ‘D’ performance/stuck ‘off’ – This DTC is triggered when there is an issue with one of the solenoids that controls the fluid pressure inside the transmission.
P2723 – Pressure control solenoid ‘E’ performance/stuck ‘off’ – This diagnostic trouble code is saved when the ECU detects a problem with one of the pressure control solenoids.

Chevy Avalanche Transmission Recalls

None Found

Chevy Avalanche Technical Service Bulletins (TSB)

TSB 05-07-30-017B – Water contamination – Chevy Avalanche 4L60E

Problem – A common transmission problem occurs when the transmission shudders/shakes between 40 and 50 mph, as the torque convertor clutch engages. This is caused by rain water getting into the transmission through the dipstick.
Solution – The air inlet grille panel will have to be modified according to the procedure outlined in the TSB.

TSB PIP4051C – Harsh Shifting – Chevy Avalanche 4L60E

Problem – Unusually harsh gear changes, combined with a P0717 DTC for an input shaft speed sensor error, are often caused by damage to the ISS sensor wiring.
Solution – If wire damage is found (usually to the white wire), the wiring and sensor will have to be replaced. The pump cover should also be examined for sharp points/edges that could damage the wiring. If any are found, they should be smoothed with a file.

Intermittent harsh shifting – Chevy Avalanche 4L60E

Problem – A common Chevy Avalanche transmission problem is an intermittent hard 1-2 shift, often accompanied by engine bogging. This condition can be caused by the torque convertor clutch applying during the shift.
Solution – To remedy the problem, the wiring harness needs to be inspected from the transmission case connector to the rear of the engine on the driver side. It’s possible that the wires for the TCC solenoid and pressure control solenoid have become frayed on a body seam. If this is the case, the wiring will need to be repaired, and the harness repositioned.

TSB 08-07-30-001 – Chevrolet Avalanche 4L80E

Problem – Harsh or delayed shifts, slipping, no forward/reverse gears. Possible DTCs: P0741, P0742, P0751, P0752, P0756, P0757, P0894.
Solution – Rebuild or replace the valve body.

TSB 08-07-30-015 – Chevrolet Avalanche 4L80E

Problem – Harsh shifts, delayed 2-3 shifts, 2-3 shift flare, no 3rd gear, slips in 3rd gear or reverse. Possible DTC 0757.
Solution – If none of the issues described in Bulletin 08-07-30-001 are present (debris in #11 checkball, leak in oil circuit, damage to the direct clutch), then replace the 2-3 shift solenoid due to a possible sticking pintle.

TSB 08-07-30-016 – Slipping, refusal to shift, overheating – Chevrolet Avalanche 4L80E

Problem – Slipping between the gears, overheating, refusal to shift out of a gear, and/or DTC P0894 or P0218, may be because by friction material debonding from the torque convertor clutch (TCC).
Solution – If the friction material has circulated throughout the transmission, the entire transmission may need to be replaced. It is possible to remove the material from the internal components (like transmission cooler lines and the valve body), but it depends on the extent of the damage.

Solenoid DTC’s – Chevrolet Avalanche 6L80E

Problem – A number of diagnostic trouble codes, including P0776, P0796, P2714 and P2723, can be caused by a pressure leak at the end of the clutch regulating valve.
Solution – The bore plug will have to be replaced with updated versions, or modified to accept an O-ring kit.

Common Problems with the Chevy Avalanche Transmission

Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Harsh shifting
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light

Can I drive with a transmission problem?

Even though your Chevy Avalanche transmission problems may not seem severe, continuing to use the truck can make a fairly simple problem, a lot more expensive to fix. In a nutshell, these may be tough trucks, but don’t push it.

How often does a Chevy Avalanche transmission need to be replaced?

As with all things mechanical, maintenance is the key to a long service life. However, factory design flaws can lead to common failure points, which can obviously impact performance and longevity. On average, we’ve noticed the Chevrolet Avalanche transmission tends to last between 130,000-180,000 miles in stock form. A properly updated remanufactured Chevy transmission on the other hand, can go considerably longer if all of the design flaws have been addressed.

How are Chevy Avalanche transmission issues diagnosed?

To figure out what is causing those Chevrolet Avalanche transmission problems, a mechanic will need to connect a code reader to the OBDII port under the dash. After reading through all of the diagnostic trouble codes that have been saved in the ECU, a visual inspection can be performed to verify the source of the problem.

How is a Chevy Avalanche transmission replaced?

Since the Chevrolet Avalanche is a rear or four-wheel-drive truck, replacing the transmission simply a matter of unbolting it from the driveshaft(s), engine and frame, then lowering it out of the way. Installation is a reverse of the removal process. However, once it is in place (for the 6L80), the ECU/PCM will have to be reprogrammed / reflashed to accept the new transmission using the latest GM subscription.

Recommendations for Chevy Avalanche transmission issues?

To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman Chevy Avalanche transmission here, then find a local shop using our Find a Shop guide to install it for you.

How to Solve Chevy Avalanche Transmission Problems

Solution A: Buy a Used Chevy Avalanche Transmission

The easiest way to solve all of your Chevrolet Avalanche transmission problems, is to get a used 4L60E / used 4L80E / used 6L80E transmission from the local junkyard. They’re relatively cheap, and most come with a 30-90 day warranty. But with no way to verify the condition of the internal components, you could be literally be buying someone else’s problems. And that warranty probably doesn’t cover labor charges either.

Solution B: Buy a Rebuilt Chevy Avalanche Transmission

The next best way to fix your Chevrolet Avalanche transmission problems would be to get a rebuilt 4L60E / rebuilt 4L80E / rebuilt 6L80E transmission from your mechanic or a transmission repair shop. However, if the mechanic uses an OE master rebuild kit, the transmission will be returned to stock. Which means all of the original problems will eventually return. And the warranty might only be good at the shop that built it.

Solution C: Buy a Remanufactured Chevy Avalanche Transmission

To resolve your Chevrolet Avalanche transmission problems the right way, you should consider a remanufactured 4L60E / remanufactured 4L80E / remanufactured 6L80E transmission from a reputable company. If it’s done right, all of the factory design issues will be dealt with. And if you can find one with a nationwide warranty, you can be protected from transmission repair bills no matter where you go.

Fair Replacement Transmission Cost by Vehicle

  1. Find your transmission model in the table below for fair prices from reputable suppliers. Also fair labor cost for local installation at a local auto repair shop.

  2. Not Sure Which Transmission You Have?
    Click Here To Look It Up By Your Year, Make, Model
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Fair Remanufactured Transmission Price Ranges by Transmission Model Updated for 2019

transmission repair cost
Download Replacement Transmission Cost Guide PDF

What Problem Does Your Chevy Avalanche Have?

Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!

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Leave a Comment

Michael

I have a 2011 Avalanche and have had it misfire twice #1. This third misfire generated a recommendation of replacing the engine. (driver side cylinder head, gasket and spark plugs need repair). Which is best new engine or repair..

Gary Wright

i have 2005 avalanche and i had my transmission rebuilt about 2 years ago and now iam the the same problems again 2 years later whats up with this type of vehicle, iam not rich

Shamone

I just got a 08 avalanche the throttle body light came I went from 70 mph to 10mph then it shut off then they supposed to fix it then stabilizer light came on and traction light came on it shut off again now dealership said they going change sensiors only had truck for 3weeks

Derrick

My 2013 avalanche transmission pauses about 2 seconds when I shift into drive. Once I get going it shifts perfect. Just stated doing this. Fluid is clean and full. Any ideas?

Karen

Oh btw it is using oil it does not leak it at all it’s using it. N the smoke gets worse if I’m stopped at a red light etc. Cld this be catilatic converter clogged up ?

Karen

My avalanche is a 2007 , ran really good then one day it didn’t have power like it did b4. It is smoking white smoke going down road but not all the time , it does keep blowing the 6th cylinder, fouling that plug out n only that one . This started 2 days after coming out of shop for a tune up that cost over $300.00 . Took it back owner said something like a busted piston has fell down in motor . But it wasn’t that way b4 it went in the shop.