Help

Navigation

Navigate by either by hovering over and clicking the flyout navigaitons to the left of this site, or by sleecting from the top which section of the website you'd like to navigate to.

The Flex Pane

This window you're reading is the Flex Pane. Its a window designed to present content to you without breaking the flow of reading the website. To the right are the controlls you'll need to operate the flex pane. to the right you can find Contact information, Email forms, Checkout using our webcart, and Search. You can also find hotlinks to these controls at the bottom of your screen.

Adding Items to the Cart

The website will present to you shop boxes like the one below.

You can click on these shopboxes to add items to your wishlist and web cart. your webcart and wishlist can be accessed by clicking the cart icon to the right of this help menu. You also checkout using the same window.

Contact Novak:

Hours of Operation:

Please only try to contact us by phone during our hours of operation

Mon-Fri: 9AM-5PM Mountain Time.
(Eastern Time, 11am to 7 pm)
(Pacific Time, 8am to 4pm)

for 2015 we'll observe all of the following major US & holidays:

Jan 1, New Years Day
May 25, Memorial Day
Jul 3, Independence Day
Sep 7, Labor Day
Nov 26 & 27, Thanksgiving
Dec 24 & 25, Christmas

By Phone:





By Mail:

Novak Conversions
PO Box 3367
Logan, UT 84323-3367
United States
(USPS or private company only)


Packages or Returns:

Novak Conversions
648 West 200 North Suite 1
Logan, UT 84321
United States
(see Return Policies for RMA info)

Email Novak:

Please fill out the following form to email Novak.


 

Captcha Code

Click the image to see another captcha.
 

Checkout

User Controls


Confirm Order

Add by Part Number



The Novak Guide to the

Jeep NSG370 Transmission

nsg370_transmissionThe NSG370 transmission was introduced in 2005 as the first six-speed to ever equip a Jeep. The transmission was direct evidence of Chrysler's then-league with Daimler.

NSG is an acronym for the German "Neues Schaltgetriebe"; literally meaning "new switching transmission" or "new manual shifting transmission".

The 370 transmission replaced the similar-strength NV3550 and the light-duty NV1500 in the Wrangler and Liberty vehicles. The 370 was installed in other Chrysler and Mercedes products, such as the Crossfire and ML Series.

Features

The NSG370 is a top-shifting, longitudinally-loaded transmission. It features six speeds with a direct drive fifth gear and an overdriven sixth gear. It is fully synchronized in all gears and has helically cut gears for all speeds.

Identification

The NSG370 has a cast aluminum case with generous ribbing. It's integral front bellhousing is available in a Jeep 4.0L I6 version and a Mopar 3.7L V6 version. The front bearing retainer has an integral throwout sleeve for a conventional throwout bearing.

Spline count for the input shaft is 10 splines x 1-1/8" diameter. The output shaft for Jeep applications has 23 splines.

NSG370 internals

NSG370 Specs at a Glance

Make: Daimler 
Length: 23.5" (I6), 24.8" (V6) 
Height: 18" 
Weight: 89 lbs.
Case: Cast aluminum
PTO Port: None
Mfg. Input Torque Rating: 272 ft. lbs. 
Fluid Capacity: 3.75 pints / 1.9 quarts 
Fill / Drain Plug: 14mm Allen / 17mm Allen
Gear Ratios (Jeep): (x-to-1):

4.46 2.61 1.72 1.25 1.00 0.84 R4.06
 

Transmission Strength 

nsg370_case_comparisonThe NSG370 is quite strong, featuring a 272 ft. lbs. input torque capacity, as claimed by the manufacturer. Output torque limits are between 1100-1300 ft. lbs., making it a good match for the NP231 and NP241OR transfer cases. The construction of the gears and visibly good level of engineering within the transmission would suggest that it should be quite durable.

However, individuals have reported problems with the 2005 model transmission popping out of reverse gear. This was widespread enough to garner the admission of DCx that an update may be needed, which consisted of a reverse gear kit (#05175903AA), itself comprised of a new reverse gear, slider and synchro ring, plus snap rings, an oil seal and countershaft seal plug, incidental to the tear-down required.

Transfer Case Compatibility 

The 370 was factory married to the NP231NP241OR and NP241J transfer cases. It features the common Jeep / Dodge 6-bolt transfer case mounting face for driver's side drop transfer cases. The 23 spline output shaft makes it compatible with the 23 spline version of the above transfer cases.

Engine Compatibility and Adaptability

kit_375_installed_rear_view

AMC / Chrysler Jeep 

The 370 is factory compatible with the Jeep / AMC 4.0L I6 engine, when equipped with the right bellhousing. It is also compatible with the 3.8L V6 when equipped with its matching bellhousing.

GM 

Chevrolet and GM Gen. III+ Small Block V6 and V8 conversions to the NSG370 are done with excellent success.

Sources

  • The Novak archives and its customer input
  • Wikipedia
  • DCx Jeep