Specifications

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1980-86 jeeps - dana 300 / atlas replacement
ATLAS TRANSFER CASE/DANA 300 REPLACEMENT:
The 4:1 gear sets, heavy duty output shafts, twin sticks, and rebuild kits are all improvements to the Dana 300 transfer case.
These components all improve the reliability and performance of the vehicle. One additional option for the Dana 300 owner is
the complete upgraded transfer case, the Atlas. The Atlas is a new transfer case we manufacture that has incorporated the all
of the upgrade options of the Dana 300 plus more. The Atlas also provides shift-on-the-fly capability, better front driveshaft
clearance, and additional ground clearance with 4 rotation options. The Atlas offers several different low gear rations, which
include a 2.0:1, 3.0:1, 3.8:1, 4.3:1, and a 5.0:1. Along with the Atlas 2 speed transfer case, we also offer a new Atlas 4 speed
transfer case. The 4 speed transfer case offers three low gear ratios of a 2.0, 2.72 & 5.44 or 2.72, 3.80 & 10.34.
The Atlas has been designed to fit as a universal transfer case. When replacing a Dana 300 and retaining your stock transmis-
sion, the Atlas will bolt directly to the stock transmission adapter. The crossmember mount is always located on this adapter
housing. No other adapters will be necessary.
When replacing a Dana 300 and changing the transmission, we offer numerous transmission-to-transfer
case adapters to mate these units. Because of the wide selection of input shaft splines, some applications
will only require the adapter housing, not a full transfer case adapter kit. All of the adapter housings we
manufacture have provisions for the rubber crossmember support.
The Atlas has the standard Dana 300 rotation, but also offers 3 other rotation options. Depending on the
rotation you choose, some body and crossmember modifications may be necessary. The twin stick
shifter assembly protrudes approximately 6-3/4”
from the front of the case. This assembly can eas-
ily be shortened to custom fit your application. The
unit for the Dana 300 replacement comes with a
new speedometer drive that connects to your stock
cable. For details on the Atlas transfer case, please
obtain a copy of our Atlas manual or go to
www.advanceadapters.com and look at our Teck
Vault.