Drivetrain› Manual Transmissions and Components

USA Standard (Yukon)

USA Standard Manual Transmission NSG370 1st 2nd Synchro Assembly 6-SPD NSG370 M T 1ST 2ND SYNCHR

$479.00

SKU: U018 ZMNSG370-80

In Stock
In Stock
Ships by Jun 18
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The USA Standard Gear NSG370 Manual Transmission Synchro Assembly (ZMNSG370-80) is designed to restore proper function and shifting performance to your Jeep’s gearbox. Specifically crafted for 2005–2018 Jeep Wrangler TJ and JK models, this replacement unit targets the 1st and 2nd gear synchros to reduce grinding, improve engagement, and bring back smooth operation to your manual transmission system. It features a polished chrome finish and is engineered to OEM specifications for strength, durability, and seamless integration.

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

BrandUSA Standard (Yukon)
Part NumberU018 ZMNSG370-80

Videos

NSG370 Transmission Common Problems and NSG370 INFO

NSG370 Transmission Common Problems and NSG370 INFO
Synchronizer Replacement on a Manual

Synchronizer Replacement on a Manual
NSG370 Standard Disassembly

NSG370 Standard Disassembly
Fix for a Jeep Wrangler manual transmission that pops out of gear

Fix for a Jeep Wrangler manual transmission that pops out of gear
6 Speed Transmission Rebuild Tip: Synchronizer Wear Comparison

6 Speed Transmission Rebuild Tip: Synchronizer Wear Comparison
Jeep Wangler NSG370 6 Speed Transmission Rebuild (Its Awesome)

Jeep Wangler NSG370 6 Speed Transmission Rebuild (Its Awesome)

Buy with Confidence

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