Jeep NSG370 Transmission Overview
Back in the early 2000’s, Chrysler was owned by Mercedes-Benz. This corporate union allowed the two other manufacturers to both share and co-develop new components. One of these cost – sharing car parts was the NSG370 transmission, which was built in Stuttgart Germany by Mercedes. This 6-speed manual transmission was used in a number of vehicles, including the Chrysler Crossfire and Jeep Wrangler. It also holds the distinction of being the very first Jeep 6-speed transmission. However, a number of NSG370 transmission problems have been reported. Two different bellhousings allow the NSG370 transmission to be used with either the Jeep 4.0L I6 or Jeep/Chrysler 3.7L V6. All of the gears, including reverse are fully synchronized, with 5th gear being the direct drive and 6th gear is overdrive. There is also a front bearing retainer with a throwout sleeve for a conventional throwout bearing.
What Transmission Do I Have?
OE NSG370 6-speed Manual Transmission Applications
2005 – 2008 Jeep liberty
2005+ Jeep Wrangler
2004 – 2006 Chrysler Crossfire
2006 – 2008 Dodge Nitro
NSG370 Technical Specs
Case: Cast aluminum
Input shaft: 10 spline – 1 1/8” diameter
Output shaft: 23 spline
Torque capacity: 272 lb-ft
Weight: 89 lbs
Length: 24.8 in – 3.7L V6 | 23.5 in – 4.0L I6
Fluid capacity: 1.9 qt
Fluid type: Chrysler MS-9224 manual transmission fluid
NSG 370 Transmission Gear Ratios
(Jeep)
1st = 4.459
2nd = 2.614
3rd = 1.723
4th = 1.245
5th = 1.000
6th = 0.838
R = 4.062
Common NSG370 Transmission Problems
The NSG 370 uses bronze synchronizer collars for smoother gear changes, but that can lead to issues if the correct synthetic Chrysler MS-9224 manual transmission fluid (or equivalent is not used). They were also the subject of a technical service bulletin, thanks to a number of owner complaints about the transmission popping out of first gear while accelerating. The recommended repair was to replace the NSG370 1-2 synchronizer assembly and snap ring. This condition is also said to occur in reverse gear, requiring a new reverse gear assembly.
What Transmission Do I Have?
