Description
Jeep NSG370 Transmission for Sale: Elevate Your Jeep‘s Performance
Is that a Jeep Wrangler JK rusting in your garage? A broken transmission, perhaps? Take a look at this Jeep NSG370 transmission for sale here. A reliable and capable 6-speed manual gearbox, this transmission will operate smoothly while cruising the highway or going on off-road adventures , a classic Jeep manual transmission setup. It has gained a reputation among enthusiasts for its 6-speed flexibility (including highway overdrive 6th gear), marking its place as a popular choice. This Jeep NSG370 transmission for sale here will be a great buy for your Wrangler JK service, manual conversion, or custom project that requires a reliable 6-speed transmission.
What is the Jeep NSG370 Transmission?
The NSG370 was designed by New Venture Gear in partnership with Mercedes / Daimler and entered Jeep production in 2005. Important note about its predecessor: In Wrangler applications, the NSG370 was designed as a successor to the NV3550 5-speed manual (which had itself replaced the AX-15 in 2000). The full Wrangler manual transmission progression is:
| Wrangler Generation | Manual Transmission | Years |
|---|---|---|
| Wrangler YJ | AX-15 (Aisin 5-speed) | 1988-1995 |
| Wrangler TJ (early) | AX-15 (Aisin 5-speed) | 1997-1999 |
| Wrangler TJ (later) | NV3550 (NVG 5-speed, cast iron case) | 2000-2004 |
| Wrangler TJ (final) | NSG370 (NVG 6-speed, aluminum case) , THIS LISTING | 2005-2006 |
| Wrangler JK | NSG370 (NVG 6-speed) , THIS LISTING | 2007-2018 |
| Wrangler JL | Revised 6-speed manual | 2018+ |
The NSG370 is NOT a direct successor to the AX-15 (the NV3550 was). The NSG370 is the successor to the NV3550, with key improvements:
- 6 forward gears (vs 5 in NV3550) for highway overdrive
- Aluminum case (vs cast iron in NV3550) for weight savings
- Dual mass flywheel for vibration damping
- More refined shifting with improved synchronizers
NSG370 Designation Explained
- “NSG“: Stands for “New Series Gear” or “New Standard Gear” (sources vary on the exact meaning)
- “370“: Indicates the approximately 370 N-m (273 lb-ft) torque capacity rating
So “NSG370” essentially means “the New Series Gear transmission with 370 N-m torque capacity.”
Vehicle Applications
The NSG370 was used in:
| Vehicle | Years | Engine Pairing | Notes |
|---|---|---|---|
| Jeep Wrangler JK , THIS | 2007-2011 | 3.8L V6 (EGH) | The first JK generation |
| Jeep Wrangler JK , THIS | 2012-2018 | 3.6L Pentastar V6 | The Pentastar refresh |
| Jeep Wrangler TJ (final year) , THIS | 2005-2006 | 4.0L AMC inline-6 | NSG370 introduced in TJ before JK launch |
| Jeep Liberty KJ , THIS | 2005-2007 | 3.7L PowerTech V6 | KJ Liberty manual option |
| Jeep Grand Cherokee WK | 2005-2006 | Various | Limited applications |
The Mercedes-Daimler Connection
The NSG370 design has roots in a Mercedes-Benz Sprinter van transmission that NVG and Mercedes / Daimler jointly developed during the DaimlerChrysler era. This shared heritage is why the NSG370 uses metric Mercedes-style fluid specifications (API GL-3) rather than the typical 75W-90 used in older American manual transmissions.
Key Engineering Features of the NSG370
- 6-Speed Manual with Overdrive 6th: Typical gear ratios 1st (4.46:1), 2nd (2.61:1), 3rd (1.72:1), 4th (1.25:1), 5th (1.00:1 direct), 6th (0.84:1 overdrive), Reverse (4.06:1)
- Cast Aluminum Case: Lighter than NV3550’s cast iron case, adequate strength for application
- Dual Mass Flywheel (DMF): Reduces vibration transmission and smooths shifts
- Fully Synchronized Forward Gears: 6 synchronizers for smooth shifting throughout the gear range
- Internal Shift Linkage: Direct top-mounted shifter
- Specific GL-3 Fluid Required: Different from older Jeep manuals (do not use GL-4 or GL-5 fluids)
- 273 lb-ft Torque Capacity: Adequate for 3.8 V6, 3.6 Pentastar, 3.7 PowerTech, and 4.0L inline-6
Common NSG370 Service Items (Honest Disclosure)
Honest disclosure of known service items:
- Dual Mass Flywheel (DMF) Failure: Most common high-mileage service item (100,000-150,000 miles). Symptoms: clutch chatter, vibration, eventually shudder during engagement. Replacement is expensive ($800-1,200 for the DMF alone, plus clutch service).
- Shifter Notchiness: Some users report the NSG370 feels “notchy” compared to older AX-15 or NV3550 transmissions. This is partly design characteristic and partly synchronizer wear at higher mileage.
- 5th and 6th Gear Synchronizer Wear: At high mileage (150,000+ miles), 5th and 6th gear synchronizers can wear, causing grind on shifts.
- Clutch System Hydraulic Issues: The hydraulic clutch master and slave cylinders are common service items.
- Fluid Type Issues: Using wrong fluid (e.g., 75W-90 GL-4) can damage NSG370 synchronizers and brass internals. Must use API GL-3 manual transmission fluid.
- Input Shaft Bearing Noise: Some high-mileage NSG370s develop input shaft bearing noise.
The NSG370 is generally durable when maintained per Jeep specifications with proper fluid. Service interval: fluid every 30,000-50,000 miles.
Why Choose a Used Jeep NSG370 Transmission?
- Cost savings vs reman ($1,499 used vs $2,000-$3,500 reman plus core)
- Direct OEM fit for Wrangler JK 2007-2018, Wrangler TJ final year 2005-2006, Liberty KJ 2005-2007
- 6 forward gears , better highway efficiency than older 5-speed manuals
- Aluminum case , lighter than NV3550 cast iron
- Strong aftermarket support , parts widely available
- Dual mass flywheel , smoother operation when in good condition
Here at Vaz Auto Solutions, you’ll find this Jeep NSG370 transmission for sale at the most reasonable price possible, with all 6 forward gears tested, reverse confirmed, dual mass flywheel condition assessed (critical service item), and donor vehicle documented.
Vehicle Compatibility
Direct Fit:
| Jeep Wrangler JK (1st gen JK) | 2007-2011 with 3.8L V6 (EGH) , most common NSG370 application |
|---|---|
| Jeep Wrangler JK (Pentastar JK) | 2012-2018 with 3.6L Pentastar V6 |
| Jeep Wrangler TJ (final year) | 2005-2006 with 4.0L AMC inline-6 |
| Jeep Liberty KJ | 2005-2007 with 3.7L PowerTech V6 |
| Jeep Grand Cherokee WK | 2005-2006 limited applications |
Engine Pairings:
| Jeep 3.8L V6 (EGH) | Wrangler JK 2007-2011 , dominant pairing |
|---|---|
| Jeep 3.6L Pentastar V6 | Wrangler JK 2012-2018 |
| Jeep 4.0L AMC Inline-6 | Wrangler TJ final year 2005-2006 |
| Jeep 3.7L PowerTech V6 | Liberty KJ 2005-2007 |
Condition and Inspection
- Donor vehicle confirmed (Wrangler JK, Wrangler TJ final year, Liberty KJ, or Grand Cherokee WK)
- Engine pairing confirmed (3.8 V6, 3.6 Pentastar, 4.0 inline-6, or 3.7 PowerTech V6)
- Bell housing pattern verified for engine pairing
- All 6 forward gears tested
- Reverse gear tested
- All 6 forward gear synchronizers assessed (1st through 6th)
- 5th and 6th gear synchronizer condition checked (common high-mileage wear point)
- Dual mass flywheel (DMF) condition assessed , critical service item
- Shifter mechanism function verified
- Bell housing condition inspected
- Aluminum case inspected for cracks
- Output shaft condition checked
- Input shaft condition verified (bearing noise check)
- Input shaft seal condition assessed
- Output shaft seal condition assessed
- Miles from donor vehicle documented where available
- All 6 gears + reverse tested on every NSG370
- All 6 synchronizers assessed (especially 5th and 6th gear , common wear points)
- Dual mass flywheel condition assessed , the most expensive NSG370 service item
- Input shaft bearing noise check (known high-mileage issue)
- Engine matching verified (3.8 V6, 3.6 Pentastar, 4.0 I6, 3.7 PowerTech)
- Donor vehicle and mileage documented
- Cross-reference assistance for Wrangler JK, TJ final year, Liberty KJ applications
- Free freight pallet delivery to all 50 states
- 15 day replacement warranty on internal defects
- Jeep NSG370 / NV3550 / AX-15 specialist support team (full Wrangler manual progression expertise)
Mike Hawkins (verified owner) –
Let me tell ya, this NSG370 from Vaz Auto is the real deal. Took my Jeep through hell and back, and this transmission didn’t even break a sweat. It’s like having a loyal buddy in your drivetrain. Bit of a chatterbox at low speeds, but hey, that’s just its way of talking to ya.
Ethan Brooks (verified owner) –
I must say, the engineering on the Jeep NSG370 from Vaz Auto Solutions is quite impressive. Its robustness is evident in challenging terrains, and the shift quality is commendable for its class. While it may not be the most refined in terms of NVH, its performance characteristics more than compensate. A solid choice for enthusiasts seeking durability.