How-To: Install Clutch Accumulator Bypass Mod
The clutch on the 2011-2016 Limited Cruze uses two components to soften shifts and protect the drivetrain from beginners. First is the CDV (clutch delay valve, technically a restrictor), which limits clutch fluid flow. This is done to limit the speed of clutch engagement if you slip your foot off the clutch. The second is the clutch accumulator, which is added eliminate the spongy feel of a restrictor-style CDV and simulate a normal clutch feel. The accumulator absorbs excess clutch pressure that cannot flow through the CDV.
Removing the CDV improves clutch pedal feel, but rapid clutch pressure during fast shifting still gets absorbed by the accumulator, which delays clutch release from the flywheel, which results in shift stiffness and shift grinding, especially for the 1-2 shift. This modification was developed in conjunction with Titan Synthetics and bypasses the accumulator.
The end result is improved, linear clutch pedal feel and vastly improved shift smoothness during rapid shifting. This mod greatly alleviates the 1-2 shift grind by addressing the root cause.
Note: you first need to remove the clutch delay valve before installing this mod. Instructions here: https://www.cruzetalk.com/forum/129...185322-how-remove-clutch-delay-valve-cdv.html
More information on the Gen1 Cruze Clutch and Shifting Upgrades: https://www.cruzetalk.com/forum/10-gen1-powertrain/236181-gen1-cruze-clutch-shifting-upgrades.html
Many thanks to M. Barton for these photos.
- Ratchet & socket set
- Flathead screwdriver
- Vacuum bleeder, like this one for $20 on Amazon.com
- Clutch Accumulator Bypass Mod from BNR: 2011-2016 Cruze Limited Clutch Accumulator Bypass
- DOT 3/4 brake fluid
1. Remove the clip holding the coolant reservoir, and slide the reservoir forward, then up. Move the reservoir out of the way, while leaving it still connected to the hoses.
2. Back by the firewall, you'll see the accumulator. Using a flathead screwdriver, pry the retaining clip up until it clicks into its open position. Do not fully remove it, as that is not necessary.
3. Remove the following retaining clip if you need to for easier access.
4. Slide the accumulator rearward until you can rotate it, then rotate it upward so the cap is facing up as shown below.
5. Place the accumulator cap removal tool and remove it using the appropriate socket.
6. Remove the cap once unscrewed completely. Inside the accumulator is a metal disc, shown below the left. You will need to remove that as well.
7. The cap has a plastic cap in the center with a spring behind it. Using the pliers, remove both the plastic cap and the spring.
8. Fit the accumulator bypass disc into the cap as shown below, and reinstall into the accumulator.
9. Rotate the accumulator again until it can be pushed back in. There's a notch, so it will only go back in once aligned. When you have it back in, push the clip back in its original position.
10. Reinstall the wiring retaining clip, the coolant reservoir, and the coolant reservoir clip.
11. Bleed the clutch line using a vacuum bleeder.
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