Jeep NSG370 Transmission for Sale | OEM Used New Venture Gear NSG370 6-Speed
$1,499.00
At a Glance
- Condition: OEM used, all 6 forward gears and reverse function-tested
- Availability: In stock, Jeep NSG370 6-speed manual transmission available
- Shipping: Free shipping to all 50 states via heavy freight, 5 to 10 business days
- Transmission verified as NSG370 New Venture Gear 6-speed manual (successor to NV3550
- Application confirmed (Jeep Wrangler JK 2005-2018, Jeep Wrangler JL 2018-current, Liberty KK with 3.7L V6, Dodge Nitro)
- Engine pairing confirmed (3.6L Pentastar, 3.7L PowerTech V6, 3.8L Chrysler EGT V6)
- All 6 forward gears and reverse function-tested
- Synchro condition assessed (no grinding or notchy engagement)
- Input shaft and output shaft spline condition documented
- Bellhousing pattern verified (V6 pattern)
- 15 day replacement warranty on internal defects
Description
About the Jeep NSG370 6-Speed Manual Transmission
Looking for a replacement manual transmission for your Jeep Wrangler JK or JL? Part Nests stocks OEM used Jeep NSG370 New Venture Gear 6-speed manual transmissions. The NSG370 is the successor to the NV3550 (per our listing) and was introduced for the JK Wrangler launch in 2005, providing a sixth gear for improved fuel economy and on-road driveability while retaining the deep first-gear ratio important for Jeep off-road applications. The NSG370 served across Jeep Wrangler JK (2005-2018), Wrangler JL (2018-current early production), Liberty KK with 3.7L V6, and Dodge Nitro applications.
Transmission Overview: NSG370 Architecture
- Configuration: 6-speed manual transmission with overdrive (1st-2nd-3rd-4th-5th-6th pattern)
- Gear Ratios: 1st 4.46:1 (deep first for off-road), 2nd 2.61:1, 3rd 1.72:1, 4th 1.25:1, 5th 1.00:1, 6th 0.84:1, Reverse 4.06:1
- Torque Capacity: Approximately 260 lb-ft (rated for 3.6L Pentastar V6 / 3.7L PowerTech V6 / 3.8L EGT V6 applications)
- Manufacturer: New Venture Gear (now Magna Powertrain), built in Syracuse New York at the New Venture Gear facility
- Predecessor: NV3550 5-speed manual (per our listing) used in TJ Wrangler 2000-2004 / LJ Wrangler 2004 / Liberty KJ 2002-2005
- Deep first gear: 4.46:1 first gear ratio provides excellent crawl ability for Jeep off-road applications
- Internal architecture: All-synchronized forward gears (reverse non-synchro), constant mesh design
NSG370 Applications and Engine Pairings
- Jeep Wrangler JK (2005-2011): Behind 3.8L Chrysler EGT V6
- Jeep Wrangler JK (2012-2018): Behind 3.6L Pentastar V6 (per our listing)
- Jeep Wrangler JL (2018-current early production): Behind 3.6L Pentastar V6 (later JL applications use ZF 8-speed automatic predominantly)
- Jeep Liberty KK (2008-2012): Behind 3.7L Chrysler PowerTech V6 (per our listing)
- Dodge Nitro (2007-2012): Behind 3.7L Chrysler PowerTech V6 or 4.0L EGT V6
NSG370 vs NV3550: The Generation Distinction
The NSG370 (this listing) is the direct successor to the NV3550 (per our listing). Key differences:
- NV3550 (2000-2005): 5-speed manual with overdrive, gear ratios 3.83 / 2.33 / 1.44 / 1.00 / 0.79 / 4.22 R, used in TJ Wrangler / LJ Wrangler Unlimited / Liberty KJ applications behind 4.0L AMC inline-6 or 3.7L PowerTech V6
- NSG370 (2005 plus, this listing): 6-speed manual with overdrive, deeper first gear (4.46:1 vs 3.83:1 NV3550), additional sixth gear for highway fuel economy, used in JK Wrangler / JL Wrangler / Liberty KK / Dodge Nitro applications behind 3.6L Pentastar / 3.7L PowerTech / 3.8L EGT V6 engines
The NSG370 is NOT a direct bolt-in replacement for NV3550 due to different bellhousing pattern, shifter location, and engine pairings.
Jeep Manual Transmission Family Lineage
The Jeep manual transmission lineage represents progressive evolution: AX-15 5-speed (pre-2000 TJ / YJ / XJ) → NV3550 5-speed (2000-2005 TJ / LJ / Liberty KJ, per our listing) → NSG370 6-speed (2005 plus JK / JL / Liberty KK / Nitro, this listing). The NSG370 represents the modern 6-speed manual peak in Jeep manual transmission design, with the additional sixth gear providing improved fuel economy compared to the predecessor NV3550 while retaining the deep first gear important for off-road crawl ability.
Jeep Transmission Family Context
The Jeep NSG370 (this listing) is the 6-speed manual transmission successor for JK / JL Wrangler and Liberty KK applications. For broader Jeep transmission context across our catalog, the Jeep NV3550 5-speed manual transmission (our listing) is the direct predecessor to this NSG370 in the Jeep manual transmission lineage. The Jeep AW4 4-speed automatic transmission (our listing, the Aisin-Warner AW4 4-speed automatic with overdrive used across XJ Cherokee and MJ Comanche applications) is the related Jeep automatic transmission representing the AW4 era of Jeep transmissions. Three Jeep transmission listings across : NV3550 5-speed manual predecessor for TJ / LJ / Liberty KJ, AW4 4-speed automatic for XJ Cherokee / MJ Comanche, (this listing) NSG370 6-speed manual for JK / JL Wrangler / Liberty KK / Nitro. For engine pairing context, the NSG370 was paired with the 3.6L Pentastar V6 in later JK / JL Wrangler applications, with the 3.7L PowerTech V6 in Liberty KK and Nitro applications, and with the 3.8L Chrysler EGT V6 in early JK Wrangler applications.
Common NSG370 Failure Modes
- 5th and 6th gear synchro wear: Highway-driven units develop synchro wear in 5th and 6th gears
- Input shaft bearing failure: Causes whine in neutral that disappears when clutch is engaged
- Shift fork wear: Causes vague shifter feel and missed gears, particularly between 3rd-4th-5th-6th
- Reverse synchro issue: Reverse is non-synchronized; grinding when engaging reverse without complete stop is normal but excessive grinding indicates wear
- Clutch slave cylinder failure: Hydraulic clutch system slave cylinder is internal to bellhousing on some applications, requiring transmission removal for replacement
- Case crack: Rare but possible from impact damage during off-road use
Vehicle Compatibility
| 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+ |
NSG370 Architecture Specifications
| 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 |
Application and Engine Pairing Reference
| Vehicle | Compatibility |
|---|---|
| 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 |
Common Failure Modes and Maintenance
| Vehicle | Compatibility |
|---|---|
| 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 |
Why Buy From Part Nests
- Transmission verified as NSG370 New Venture Gear 6-speed manual (successor to NV3550
- Application confirmed (Jeep Wrangler JK 2005-2018, Wrangler JL 2018-current, Liberty KK, Dodge Nitro)
- Engine pairing confirmed (3.6L Pentastar, 3.7L PowerTech, 3.8L EGT V6)
- All 6 forward gears and reverse function-tested
- Synchro condition assessed
- Input shaft and output shaft spline condition documented
- Bellhousing pattern verified
- Free shipping to all 50 states via heavy freight
- 15 day replacement warranty on internal defects
- Jeep-experienced support team familiar with NSG370 / NV3550 / AW4 transmission evolution
- Call (855) 634-4447 to confirm your application before we ship.
15 Day Replacement Warranty
Every used Jeep NSG370 manual transmission purchased through Part Nests carries a 15 day replacement warranty starting on the delivery date.
What Is Covered
- Internal defects already present when the transmission arrives
- Gear failures within 15 days from installation on any of the 6 forward gears or reverse
- Synchronizer failures within 15 days from installation (where condition was documented as serviceable at shipping)
- Input shaft and output shaft failures within 15 days from installation
- Bearing failures within 15 days from installation
- Shift fork failures within 15 days from installation
- Case crack failures not disclosed at shipping
- Incorrect application shipped (JK vs JL vs Liberty KK vs Nitro mismatch where application was documented) due to an error on our end
- Incorrect bellhousing pattern shipped (3.6L Pentastar vs 3.7L PowerTech vs 3.8L EGT pattern mismatch where pattern was documented) due to an error on our end
What Is Not Covered
- Damage caused during installation
- Damage from incorrect gear oil (Jeep specifies MOPAR Manual Transmission Lubricant Plus 4 or equivalent GL-3 75W-85 for NSG370; using GL-5 gear oil can damage synchros due to additive incompatibility)
- Damage from extended fluid service intervals (30,000-60,000 mile gear oil intervals recommended)
- Damage from clutch operation issues (slipping, dragging, incorrect adjustment, pilot bearing failure, internal slave cylinder failure on applicable variants)
- Damage from off-road impact or driveline binding (the case is not designed for severe impact)
- Damage from cross-application (JK NSG370 installed in Liberty KK without bellhousing verification; engine pairings differ across applications)
- External components (clutch assembly, flywheel, pressure plate, throwout bearing, pilot bearing, slave cylinder if hydraulic, driveshaft, transmission mount / crossmember, transfer case, shift linkage / shifter assembly, fluids drained for transit) unless itemized
- Labor expenses of any kind
To start a warranty claim, reach us within 15 days of delivery at (855) 634-4447.
- All 6 Gears and Reverse Function-Tested: Synchro engagement verified
- Transmission Verified: NSG370 New Venture Gear 6-speed
- Application Confirmed: JK / JL Wrangler / Liberty KK / Dodge Nitro
- Engine Pairing Confirmed: 3.6L Pentastar / 3.7L PowerTech / 3.8L EGT V6
- Synchro Condition Assessed: 5th / 6th gear common wear point checked
- Bellhousing Pattern Verified: V6 pattern matched
- Deep First Gear: 4.46:1 crawl ratio preserved for off-road capability
- 15 Day Replacement Cover: Internal defects protected from delivery onward
Additional information
| Brand | Jeep |
|---|---|
| transmission-type | 6-speed manual |
| designation | NSG370 |
| manufacturer | New Venture Gear (in partnership with Mercedes / Daimler) |
| speeds | 6 forward + reverse |
| construction | Cast aluminum case |
| synchronization | Fully synchronized forward gears (6 synchronizers), unsynchronized reverse |
| torque-capacity | ~370 N-m (273 lb-ft) |
| flywheel | Dual mass flywheel (DMF) |
| predecessor-in-wrangler | NV3550 5-speed (2000-2004), which itself replaced the AX-15 (1988-1999) |
| successor-in-wrangler-jl | Revised 6-speed manual (2018+) |
| production-years | 2005-2018 (in Jeep applications) |
| fluid-type | API GL-3 manual transmission fluid (Mopar specification), NOT 75W-90 GL-4 |
| direct-fit | Jeep Wrangler JK (2007-2018), Wrangler TJ final year (2005-2006), Liberty KJ (2005-2007), Grand Cherokee WK (limited) |
| common-engine-pairings | 3.8L V6, 3.6L Pentastar V6, 4.0L AMC inline-6, 3.7L PowerTech V6 |
| drive-configuration | RWD primary with transfer case for 4WD |
| price | $1, 499.00 |
New Venture Gear 6-speed manual successor to NV3550 for JK Wrangler launch. The Jeep NSG370 is the OEM Jeep New Venture Gear NSG370 6-speed manual transmission, the successor to the NV3550 (per our listing). The NSG370 was introduced for the JK Wrangler launch in 2005, providing a sixth gear for improved fuel economy and on-road driveability while retaining the deep first-gear ratio important for Jeep off-road applications. The NSG370 served across Jeep Wrangler JK (2005-2018), Wrangler JL (2018-current early production), Liberty KK with 3.7L V6, and Dodge Nitro applications. Specifications: 6-speed manual with overdrive, gear ratios 1st 4.46:1 (deep first for off-road) / 2nd 2.61:1 / 3rd 1.72:1 / 4th 1.25:1 / 5th 1.00:1 / 6th 0.84:1 / Reverse 4.06:1, approximately 260 lb-ft torque capacity, built by New Venture Gear in Syracuse New York.
5-speed vs 6-speed manual with different first gear ratios and engine pairings. The NSG370 (this listing) is the direct successor to the NV3550 (per our listing). NV3550 (2000-2005): 5-speed manual with overdrive, gear ratios 3.83 / 2.33 / 1.44 / 1.00 / 0.79 / 4.22 R, used in TJ Wrangler / LJ Wrangler Unlimited / Liberty KJ applications behind 4.0L AMC inline-6 or 3.7L PowerTech V6. NSG370 (2005 plus, this listing): 6-speed manual with overdrive, deeper first gear (4.46:1 vs 3.83:1 NV3550), additional sixth gear for highway fuel economy, used in JK Wrangler / JL Wrangler / Liberty KK / Dodge Nitro applications behind 3.6L Pentastar / 3.7L PowerTech / 3.8L EGT V6 engines. The NSG370 is NOT a direct bolt-in replacement for NV3550 due to different bellhousing pattern, shifter location, and engine pairings.
Multiple Jeep and Dodge applications 2005-2018. Jeep Wrangler JK (2005-2011): behind 3.8L Chrysler EGT V6. Jeep Wrangler JK (2012-2018): behind 3.6L Pentastar V6 (per our listing). Jeep Wrangler JL (2018-current early production): behind 3.6L Pentastar V6 (later JL applications use ZF 8-speed automatic predominantly). Jeep Liberty KK (2008-2012): behind 3.7L Chrysler PowerTech V6 (per our listing). Dodge Nitro (2007-2012): behind 3.7L Chrysler PowerTech V6 or 4.0L EGT V6. The bellhousing pattern must match the specific engine; cross-application across engine families (3.6L Pentastar vs 3.7L PowerTech vs 3.8L EGT) requires careful bellhousing verification.
AX-15 → NV3550 → NSG370 progressive evolution. The Jeep manual transmission lineage represents progressive evolution. AX-15 5-speed (pre-2000 TJ / YJ / XJ): Aisin AX-15 5-speed manual. NV3550 5-speed (2000-2005 TJ / LJ / Liberty KJ, per our listing): improved synchros over AX-15. NSG370 6-speed (2005 plus JK / JL / Liberty KK / Nitro, this listing): additional sixth gear for highway fuel economy plus deeper first gear for off-road. The NSG370 represents the modern 6-speed manual peak in Jeep manual transmission design, with the additional sixth gear providing improved fuel economy compared to the predecessor NV3550 while retaining the deep first gear important for off-road crawl ability.
Three Jeep transmissions in. The Jeep NSG370 (this listing) is the 6-speed manual transmission successor for JK / JL Wrangler and Liberty KK applications. The Jeep NV3550 5-speed manual transmission is the direct predecessor to this NSG370 in the Jeep manual transmission lineage. The Jeep AW4 4-speed automatic transmission is the Aisin-Warner AW4 4-speed automatic with overdrive used across XJ Cherokee and MJ Comanche applications (the related Jeep automatic transmission representing the AW4 era of Jeep transmissions). Three Jeep transmission listings across : NV3550 5-speed manual predecessor, AW4 4-speed automatic for XJ Cherokee / MJ Comanche, (this listing) NSG370 6-speed manual successor. For engine pairing context, the NSG370 was paired with the 3.6L Pentastar V6 in later JK / JL Wrangler applications, with the 3.7L PowerTech V6 in Liberty KK and Nitro applications, and with the 3.8L Chrysler EGT V6 in early JK Wrangler applications.
Six well-documented failure modes. 5th and 6th gear synchro wear: highway-driven units develop synchro wear in 5th and 6th gears. Input shaft bearing failure: causes whine in neutral that disappears when clutch is engaged. Shift fork wear: causes vague shifter feel and missed gears, particularly between 3rd-4th-5th-6th. Reverse synchro issue: reverse is non-synchronized; grinding when engaging reverse without complete stop is normal but excessive grinding indicates wear. Clutch slave cylinder failure: hydraulic clutch system slave cylinder is internal to bellhousing on some applications, requiring transmission removal for replacement. Case crack: rare but possible from impact damage during off-road use. Most failures can be prevented or delayed by proper gear oil maintenance and smooth shifting practices.
MOPAR Manual Transmission Lubricant Plus 4 or equivalent GL-3 75W-85. Jeep specifies MOPAR Manual Transmission Lubricant Plus 4 or equivalent GL-3 75W-85 gear oil for the NSG370. Using GL-5 gear oil (typically marketed for differentials) can damage synchros due to additive incompatibility - the high-pressure additives in GL-5 oils can attack the brass/copper synchro components. Recommended brands include MOPAR Manual Transmission Lubricant Plus 4 (OEM specification), Pennzoil Synchromesh, AMSOIL Synchromesh, and Jeep / Mopar dealer-approved GL-3 75W-85 gear oil. Fluid change interval: 30,000-60,000 miles for normal service, shorter for severe service (off-road, heavy hauling). Heavy off-road use benefits from more frequent fluid changes due to higher operating temperatures.
No. There is no core return required.
2 reviews for Jeep NSG370 Transmission for Sale | OEM Used New Venture Gear NSG370 6-Speed
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Cordelia M. –
Got the part for my Jeep NSG370 Transmission. Simple process end to end.
Magdalena S. –
Bolted up to the Jeep NSG370 Transmission clean. Nothing to complain about.