Introduced for the 2002 model year, the Chevrolet Trailblazer was the marque’s entry into the hotly contested midsize SUV segment. Sales were brisk, and this Chevy truck won many awards, partly due to its innovative engines. Even though it was discontinued in 2009, you still see plenty of them on the road today. This is thanks to those innovative and reliable engines, and that durable Chevrolet Trailblazer 4L60E. But, Trailblazer transmission problems still happen. So let’s find out what you can do about them.
Chevy Trailblazer Transmission Models
Chevy Trailblazer: 4L60E Transmission
Chevy Trailblazer 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 4L60E Transmission:
|Transmission||Street Smart Transmission||Autozone||Advance Auto Parts|
|4L60E / 4L65E||1480||1507||1599|
What are the DTC codes related to Chevy Trailblazer 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.
Chevy Trailblazer Transmission Recalls
Chevy Trailblazer Technical Service Bulletins (TSB)
TSB PIP4051C – Harsh Shifting – Chevrolet Trailblazer 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 -Chevrolet Trailblazer 4L60E
Problem – A common Chevrolet Trailblazer 4L60E 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.
PIP5071 – Squawking noise on the 2-3 shift – Chevrolet Trailblazer 4L60E
Problem – An unusual squawking or groaning noise may be heard on the upshift from 2nd to 3rd gear.
Solution – The 3-4 friction and steel plates, clutch plate, apply plate, and selective backing plates will have to be replaced.
Common Problems with the Chevy Trailblazer Transmission
Lack of Response
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
No 3rd or 4th Gear
No 1st or 2nd Gear
Trouble Codes / Check Engine Light
Can I drive with a transmission problem?
Chevrolet Trailblazer transmission problems generally start out small, which may tempt you to keep driving the truck. However the continued strain of driving will eventually cause damage to other components, leading to a much higher repair bill. So you should really have a mechanic check the truck out at the first sign of trouble.
How often does a Chevy Trailblazer transmission need to be replaced?
Obviously, you will get a lot more life out of a transmission if you maintain it properly. Driving style and factory design flaws also play a part. That said, the average Chevrolet Trailblazer 4L60E transmission usually lasts between 130,000-180,000 miles. A remanufactured transmission on the other hand, can sometimes last a lot longer.
How are Chevy Trailblazer transmission issues diagnosed?
Although you might be able to guesstimate the cause of your Chevy Trailblazer transmission problems, you actually need the right tools and experience to figure out what needs to be fixed. An OBD2 code scanner is a good place to start, followed by a thorough visual inspection.
How is a Chevy Trailblazer transmission replaced?
To replace your Chevy Trailblazer transmission, it needs to be lifted up off the ground to access all of the parts that need to be unbolted. After the transmission is lowered to the ground (usually with a transmission jack), the new transmission can be installed in the reverse order. However, the ECU will have to be reprogrammed / reflashed to accept the new transmission.
Recommendations for Chevy Trailblazer 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 Trailblazer transmission here, then find a local shop using our Find a Shop guide to install it for you.
How to Solve Chevy Trailblazer Transmission Problems
Solution A: Buy a Used Chevy Trailblazer Transmission
For a quick solution to most severe Chevrolet Trailblazer transmission problems, you may consider buying a used 4L60E transmission from the local junkyard. They’re cheap and easy to find. Plus most of them come with a warranty. However, it may have even more problems than you have right now, and you wouldn’t know unless you tore it apart.
Solution B: Buy a Rebuilt Chevy Trailblazer Transmission
A less risky option would be to get a rebuilt 4L60E transmission from either your mechanic, or a local transmission repair shop. These typically have a lot of new transmission parts, like seals and clutches. And they usually come with some sort of warranty. But many mechanics won’t know how to modify the transmission, so it won’t have the same inherent problems that stem from the factory design flaws. Plus, the warranty you get might only be good at that one shop, leaving you without warranty coverage if you travel.
Solution C: Buy a Remanufactured Chevy Trailblazer Transmission
To keep your truck on the road for as long as possible, you should strongly consider a remanufactured transmission. These typically contain higher quality transmission parts, and the whole build process can create a much better transmission, provided there are quality control checks in place. The warranties are usually much better too.
What Problem Does Your Chevy Trailblazer 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!