large bearing np205 rebuild kit

$194.18

Plus Applicable State Sales Tax & Shipping ( USPS Medium Flat Rate Box for $13.60 )

np205 vehicle speed sensor

$164.20

Plus Applicable State Sales Tax & Shipping

29 spline coupling shaft

$126.00

Plus Applicable State Sales Tax & Shipping ( USPS Medium Flat Rate Box for $13.60 )

PARTS REQUIRED


  • '85-'91 GM Circular Pattern NP205
  • '01-'16 GM 2500HD/3500HD ​Allison 1000 Series 5 or 6 Speed Transmission
  • Vehicle Speed Sensor Conversion

32 spline front output shaft

$195.00

Plus Applicable State Sales Tax & Shipping

Many of you may be wondering if you can adapt a '85-'91 Circular Pattern GM NP205 transfer case to the 5 or 6 speed Allison Transmission.  After months of research and development we have finally made it a reality on a production basis.  Now you can rest at ease knowing it can be done quickly and easily.  This is a perfect solution for your GM Square Body Duramax Diesel Engine Conversion and will allow the use of the passenger side drop Dana 60 front axle.  This will maintain the outside appearance of the nostalgic GM Square Body in every way possible.  

ALLISON TRANSMISSION TO '85-'91 gm CIRCULAR PATTERN gm NP 205 adapter

$589.00

Plus Applicable State Sales Tax & Shipping ( Ships USPS Medium Flat Rate Box for $13.60 )

cnc machining service: np205 rear bearing retainer housing modification

note- rear bearing retainer housing must be a bare casting free of grease & Oil.   an additional charge of $50.00 will be applied if the bearing retainer housing arrives at our facility completely assembled.  

$113.60

Includes USPS Medium Flat Rate Box Return Shipping@ $13.60

np205 40 pulse tone wheel

$51.95

Plus Applicable State Sales Tax & Shipping

29 spline np205 input shaft

$212.50

Plus Applicable State Sales Tax & Shipping ( USPS Medium Flat Rate Box for $13.60 )

np205 vehicle speed sensor pigtail harness

$12.22

Plus Applicable State Sales Tax & Shipping

np205 mechanical drive speedometer plug

$20.79

Plus Applicable State Sales Tax & Shipping

NP 205 features


  • HD Cast Iron Construction
  • Helical Gear Driven
  • 1.96:1 Low Range Ratio & 1:1 High Range Ratio
  • Synronized High Range Gear
  • Part Time 4WD
  • ​Manual Shift
  • Fixed & Slip Yoke Rear Output Shafts Available

ALLISON TRANSMISSION TO '85-'91 GM CIRCULAR PATTERN NP205 conversion