NP205 3-to-1 LoMax™ Gears

JB Conversions LoMax 205

Part #2800-01 (Full Gear Set w/32 Spline Input Gear) -- $2,500.00

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Components:

  • LoMax 3-to-1 Gear Set (5 total)
  • GM 32 Spline Input Gear

Options:

  • Rebuild Kit

Cases available in November

Part #2800-01 does not include a case. We will have our new Iron cases available in November for an introductory price of $400 plus shipping for customers who purchase the Full Gear Set Part #2800-01.

To secure a case at introductory pricing when they arrive in November, purchase the Full Gear Set Part #2800-01 now. We will call you in November when the cases arrive. The cost will be $400 plus shipping for an Iron case.

Indicate in the shopping cart if you are interested in an Iron Case in November. Again, this Iron Case introductory price of $400 plus shipping is only for customers who purchase the Full Gear Set Part #2800-01.

JB Conversions LoMax 205

LoMax 205 3:1 Gear Set

The new gear set is being manufactured to high tolerances using 8620 alloy standard to the gear industry. Heat treat processes and hardening are being performed to exact New Process Gear specifications as dictated by the original OEM NP205 drawings.

JB Conversions LoMax 205

Case - front view

The new LoMax gear case (available in November) is a high quality ductile iron casting. The new case is fully compatible with the stock NP205 shift forks, output shafts, shift rails, bearing retainers, etc. The GM round pattern (6 bolts) and the long 8-bolt pattern are present in the front face of the case. Although not shown in the front view photo above, alternate bolt holes will be provided to allow an upward rotation of the new case. Our goal is to provide the owner of a stock GM NP205 with a new case that will directly replace the original with no changes to driveshaft length, shifter linkage, etc.

Optional Mounting:

JB Conversions LoMax 205

When totally assembled, the LoMax 205 weighs in at 135 lbs. The bottom inspection cover is equipped with an optional mounting boss to accompany the side mount common to the stock GM case.

Case Comparisons:

JB Conversions LoMax 205

The new LoMax case is thicker than the original New Process case however it is more compact overall.

JB Conversions LoMax 205

The LoMax case is the same length as the stock case. Shifter location
and driveshaft lengths do not change with the addition of the LoMax case.

Gear Comparisons:

JB Conversions LoMax 205

Due to the longer tooth width of the LoMax gears, gear strength increases over that of the stock
New Process gears. Stock NP205 tooth width is 1.25" whereas the LoMax tooth is 1.50".

JB Conversions LoMax 205

The original NP205 uses a tapered roller bearing arrangement to achieve
maximum thrust load capacity as opposed to a straight roller bearing and
thrust plate design found on lighter duty cases like the Dana 300 or Atlas II.

JB Conversions LoMax 205

The NP205 is the undisputable King of strength when it comes to 4x4 transfer cases.
Aside from some of the bigger commercial designs, there is nothing that comes close
to competing with the NP205 when it comes to brute gear strength.

JB Conversions LoMax 205

Additional Info

Install Instructions

Install Instructions

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Related Products

Rebuild Kit

Rebuild Kit

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