Sale

Drivetrain› Manual Transmissions and Components

RV6 Performance

Helical Cut 3rd & 4th Gear Set

$789.00 $775.00 Save $14.00

SKU: 1.5T_3RD4TH

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The RV6 Performance Helical Cut 3rd+4th Gear Set is designed to address the weak 3rd and 4th gears in the 2016+ L15B 1.5T FWD transmission. It offers updated gear ratios, with the 4th gear changing from 1.0124 to 1.055 and the 3rd gear changing from 1.361 to 1.313.
Show original supplier description
The RV6 Performance Beta Helical Cut 3rd+4th Gear Set provides an affordable solution for the known weakness in the 3rd and 4th gears of the 2016 and newer L15B 1.5T FWD transmission. This upgrade features revised gear ratios, increasing the 4th gear ratio from 1.0124 to 1.055 and decreasing the 3rd gear ratio from 1.361 to 1.313, optimizing performance. Installation of this gear set requires specific modifications to ensure proper function and avoid damage. A speedometer corrector module is necessary to maintain accurate speed readings due to the altered gear ratios. Additionally, the speed sensor must be shimmed by 3.75mm to prevent any contact with the 3rd gear. This gear set is explicitly designed for the 2016+ Honda Civic with the L15B 1.5T engine and FWD transmission. It is also noted to fit the 2018-2022 Honda Accord with the L15B 1.5T MT.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRV6 Performance
Part Number1.5T_3RD4TH
CategoryDrivetrain

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy