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  Store > Transfer Cases >

Advance Adapters Atlas 4 Speed 4x4 Transfer Case
Atlas 4 Speed Transfer Case Images
 
Additional Images
Select case options and click "update price w/ options" button.
Estimate: $3,994.00



Availability: Est. Build Time is 8 Weeks

Part Number: ATLAS-4SPD

Case Setup Options:







Oil Sight Tube Delete

 Add Gear Oil and Stud Kit [+$69.00]

Tailhousing Options:





Speedometer Hole Plug [+$20.00]

For speedometers, please list tire size and axle ratio in the order comments.

Input & Output Options








Add Parking Brake Kit [+$330.00]
Requires rear 1310/1350 series flange (select above).

Shifter Options:



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♦ This item has a 15% cancellation fee once processed.

♦ Pricing: Due to countless possible case configurations, the pricing provided by our website is only an estimate. Actual pricing will be provided for your approval upon order review.

♦ Sales Tax: Sales tax applies to all states except AK, DE, MT, NH, and OR. If sales tax is not calculated correctly by our website, we will adjust it and contact you for approval.

♦ Shipping: The shipping quote provided by our website is only a quote, actual shipping will be calculated upon order review.

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Description
 

Atlas Transfer Case Image Advance Adapters Atlas 4 Speed Transfer cases are built upon the industry leading Atlas 2 speed case with well over 10,000 units sold and are designed specifically for rock crawlers that need incredibly low gear ratios for slow speed technical driving. They are available with four different gear ratio combinations with low range options down to an amazing 11.70 to 1. All Atlas transfer cases are custom built to order by Advance Adapters in the exact configuration that you need with the specific internal component and accessories that you choose.

*Note: It is not recommended to flat-tow vehicles with a 4-speed Atlas cases.


Option 1: Gear Ratios

The first of many choices you need to make when ordering an Atlas T-Case is selecting the appropriate gear set. For the 4 speed model case, you have four available low gear ratio combinations to choose from, all featuring a 1:1 high range gear ratio for high speed or daily driving.

Case Gear 1 Gear 2 Low High
Standard 1.50:1 2.72:1 4.08:1 1.00:1
Standard 2.11:1 2.72:1 5.44:1 1.00:1
Standard 2.72:1 3.00:1 8.16:1 1.00:1
Standard 2.72:1 3.80:1 10.34:1 1.00:1
Standard 2.72:1 4.30:1 11.70:1 1.00:1



Option 2: Front Output Shaft Orientation

Atlas transfer cases can be built with the front output shaft placed on either the driver or passenger side of the transmission, depending on which side of the front axle the differential is located, and at several angles ranging from perfectly level down to a 35 degree depending on vehicle clearance and configuration.

Atlas case top view cutaway

Update: All new Atlas transfer cases are clockable in 7 degree increments from 0 to 35 degrees.
  • Driver Side Output - Clockable to 35 degrees depending on existing transmission drop angle.
  • Passenger Side Output - Clockable to 35 degrees depending on existing transmission drop angle.


Option 3: Transmission Adapter

Atlas transfer cases may require an adapter plate as well as several other internal components to bolt to your transmission. Luckily, as their name implies, Advance Adapters has got you covered. If you don't see your transmission listed in the pull-down menu above or the table below, please contact us and we will help you configure your case.


Option 4: Transfer Case Tailhousings and Speedometers

Atlas 4 speed transfer cases are available with two different tailhousing and speedometer options and your choice of standard or competition rated output shafts.

Standard tailhousing image Standard 32 Spline Atlas Tailhousing
The standard Atlas transfer case comes with a rear tailhousing that accepts an '87 and newer Jeep speedometer or the Atlas mechanical speedometer and allows you to calibrate your speedometer for tire and gearing changes.

Heavy Duty 32 Spline Tailhousing
The HD Atlas rear tailhousing is the same as the standard housing with the exception of the output shaft which is machined from stronger 300M steel. This tailhousing is designed for competition use and is rated to be 130% stronger than the standard output shaft.


Short tailhousing image Short 32 Spline Tailhousing (No Speedometer)
For rock crawlers, smaller vehicles, or rear engine applications where space is tight and speedometers are not needed, the Atlas shorter tailhousings is the perfect choice. It has no speedometer input to save space and is 2 inches shorter than the standard tailhousing.

Short 32 Spline HD Tailhousing (No Speedometer)
The heavy duty short tailhousing is the same as the standard version except for the output shaft which is machined form 300M steel that is 130% stronger and rated for competition use and high horsepower applications.



Option 5: Transfer Case Input Shaft

There are many different Atlas input shafts available with various lengths and spline counts to fit most popular applications and configurations. In some cases, an adapter may be required to mate the transfer case to your transmission and we've listed the appropriate Advance Adapters part number below for your reference. Once you've identified your transmission and adapter requirements, the required input shaft is listed in the far right column. If your application is not listed below please contact Filthy Motorsports as some applications are not listed and custom adapters are available.

Make Model Config. Speeds Output Required Adapter Input Shaft
Jeep T98 4WD 4 Speed 6 Spline 50-7503 23 Spline
Jeep T18 4WD 4 Speed 6 Spline 50-7502 23 Spline
Jeep T4 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline
Jeep SR4 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline
Jeep T5 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline
Jeep T176 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline
Jeep AX15 4WD 5 Speed 23 Spline (Stock OEM) 23 Spline
Jeep NV3550 4WD 5 Speed 23 Spline (Stock OEM) 23 Spline
Jeep NSG370 4WD 6 Speed 23 Spline (Stock OEM) 23 Spline
Jeep AW4 4WD 4 Speed 23 Spline (Stock OEM) 21/23 Spline
Jeep TorqueFlite 727 4WD 3 Speed 23 Spline (Stock OEM) 23 Spline
Jeep TorqueFlite 999 4WD 3 Speed 23 Spline (Stock OEM) 23 Spline
Jeep 42RLE 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline (Short)
Jeep 32RH 4WD 3 Speed 23 Spline (Stock OEM) 23 Spline
Jeep 5-45RFE 4WD 4 Speed 23 Spline (Stock OEM) 23 Spline (Long)
GM SM420 2/4WD 4 Speed 10 Spline 50-9702 23 Spline
GM SM465 4WD 4 Speed 10 Spline 51-9807 10 Spline
GM SM465 2WD 4 Speed 35 Spline 51-9807 35 Spline
GM NV4500 4WD 5 Speed 32 Spline 51-0205 & 0220 32 Spline/HD
GM Powerglide 2/4WD 2 Speed 27 Spline 50-9200 27 Spline
GM TH350 2WD 3 Speed 27 Spline 50-6802 23 Spline
GM TH350 4WD 3 Speed 27 Spline AS-6800 27 Spline
GM TH400 2WD 3 Speed 32 Spline 51-6400 32 Spline/HD
GM TH400 4WD 3 Speed 32 Spline AS-6401 32 Spline/HD
GM 700R4 2WD 4 Speed 27 Spline 50-9102 27 Spline
GM 700R4 4WD 4 Speed 27 Spline AS-9111 27 Spline
GM 4L60 2WD 4 Speed 27 Spline 50-9102 27 Spline
GM 4L80 & 4L80E 4WD 4 Speed 32 Spline 51-6408 32 Spline/HD
GM 4L60 4WD 4 Speed 27 Spline AS-9111 27 Spline
GM 4L60E ('96-) 2WD 4 Speed 27 Spline 50-0404 23 Spline
GM 4L60E ('96-) 4WD 4 Speed 27 Spline AS-9111 27 Spline
GM 4L60E ('97+) 2WD 4 Speed 27 Spline 50-0405 & 50-9102 23 Spline
GM 4L60E ('97+) 4WD 4 Speed 27 Spline 50-0405 & AS-9111 27 Spline
GM 4L60E (R.B.) 4WD 4 Speed 27 Spline 50-9300 23 Spline (Custom)
Ford T98 2/4WD 4 Speed 31/28 Spline 50-7503 23 Spline
Ford T18 2/4WD 4 Speed 31/28 Spline 50-7500 23 Spline
Ford T19 2/4WD 4 Speed 31/28 Spline 50-6501 23 Spline
Ford NP435 2/4WD 4 Speed 31/28 Spline 50-3801 23 Spline
Ford ZF 4WD 5 Speed 31 Spline (Stock OEM) 31 Spline
Ford C4 (66-77) 4WD 3 Speed 28 Spline (Stock OEM) 28 Spline
Ford C4 4WD 3 Speed 31/28 Spline 50-8100 23 Spline
Ford C4 (Short) 4WD 3 Speed 31/28 Spline 50-2903 27 Spline
Ford AOD 4WD 4 Speed 31 Spline (Stock OEM) 31 Spline
Ford C6 4WD 3 Speed 31 Spline (Stock OEM) 31 Spline
Dodge NV4500 4WD 5 Speed 23 Spline (Stock OEM) 23 Spline
Dodge NV4500 4WD 5 Speed 29 Spline (Stock OEM) 29 Spline/HD



Option 6: Transfer Case Front Output Shaft

Atlas output shafts image 2012 UPDATE: Heavy Duty 32 Spline Output Shafts Are Now Standard.

Heavy Duty 32 Spline Front Output Shaft
The 32 spline front output shaft is a popular upgrade that is highly recommended by Filthy Motorsports as it is rated for vehicles over 5,000 lbs. and is designed to accept larger and stronger front yoke assemblies commonly found in half-ton and one ton trucks.


Option 7: Transfer Case Front and Rear Yokes

There are a variety of yokes to choose from when ordering your Atlas transfer case including CV, non-cv, and output flange styles for both 26 spline and heavy duty 32 spline output shafts. Sizes range from Spicer series 1310 to series 1410 to fit almost all popular drive shafts and axles. Other custom yokes are available by request, U-joints not included.
U-Joint sizes image
1310 U-Joint A very common automotive U-Joint for OE applications.
1330 U-Joint Used in many modern OE cars and SUV applications.
1350 U-Joint Medium size OE trucks and a popular performance upgrade.
1410 U-Joint Standard equipment on most 3/4 and 1 ton trucks.


Advance Adapters Atlas Transfer Case Warranty

Atlas Transfer Cases are guaranteed against defects in workmanship and materials for the life of the original purchaser and is non-transferable. This lifetime guarantee covers and is limited to gear sets and castings. The remainder of the unit (i.e. shafts, bearings, gaskets, hardware) is covered by our limited 1-year warranty. This warranty begins from the date that the unit is shipped from Advance Adapters. The lifetime and limited guarantees are voided (as determined by Advance Adapters Inc.) by misuse, abuse, improper maintenance, or alterations of the product. These guarantees do not cover any labor, shipping, normal wear, or any other unforeseen event that may occur due to failure of a unit. Advance Adapters reserves the right to repair or replace any product. All warranty claims should be directed to Filthy Motorsports immediately.

*Warranty Voided if the proper gear lubricants are not used and proper oil levels are not maintained, or the product has not been properly installed and the instructions have not been followed.



 2 Speed Case Specs. 4 Speed Case Specs.
Case Material 356-T6 Heat Treated Aluminum 356-T6 Heat Treated Aluminum
Overall Length 11.8" Short / 13.8" Long Tail 16.75" Short / 18.75" Long Tail
Case Weight 110 lbs. (Dry) 125 lbs. (Dry)
Gear Style Helical Cut Helical Cut
Bearing Types Needle & Taper Rollers Needle & Taper Rollers
Synchronizers Borg Warner Borg Warner
Input Shaft Splines 11 Options (10 - 35) 7 Options (21 - 34)
Front Output 26 or 32 Spline 32 Spline
Tail Shaft Splines 32 Spline HD or 300M 32 Spline HD or 300M
Normal Op. Temp. 160F - 175F Degrees 160F - 175F Degrees
High Output Temp. 190F - 220F Degrees 190F - 220F Degrees
Max Temperature 230F - 240F Degrees 230F - 240F Degrees
Oil Capacity 2.0 Quarts (Amsoil GL4) 2.5 Quarts (Amsoil GL4)


How to Shift an Atlas Transfer Case



(The 4 Speed Atlas case has a third lever for the additional reduction box.)

Features

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 3 Write a review.

  0 of 0 people found the following review helpful:
 
5 of 5 4 Speed Atlas Case April 23, 2024
Reviewer: Mark from Kalamazoo, MI  
I wanted to thank everyone for the efforts put in to making the purchase of the transfer case as smooth as possible. Please pass this on to your friends at Advanced, they came through and delivered when stated.
I will not hesitate to buy from Filthy Motorsports again!

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  0 of 0 people found the following review helpful:
 
5 of 5 Great Service! August 25, 2017
Reviewer: Anonymous Person from Rescue, CA  
The case showed up in a few weeks and looks great! The Jeep goes into the garage next week for the teardown and build up. Thanks again for the easy ordering and friendly service on my Atlas. You guys are really the cream of the crop in the industry. Anything I need in the future that you carry, I'll definitely be coming right back!

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  1 of 1 people found the following review helpful:
 
5 of 5 Great Price February 21, 2017
Reviewer: Anonymous Person from Middletown, OH  
The best pricing I could find. Great company to work with.

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