Remanufactured GM NP205
Current lead time is ~18-24 weeks.
Remanufactured GM NP205, no core charge.
All Offroad Design NP205's are completely rebuilt with new wear parts (bearings, seals, etc.) and inspected gears and shafts; hard parts are replaced as necessary. We don't simply put new bearings and seals in a junkyard housing, we make sure only premium parts make it into our rebuilt cases: it typically takes us several core transfer cases to put together one really good one.
Front driveshaft on the RH side (passenger's side in the US).
No core charge. We do buy cores, but if they have to be shipped it typically is not cost effective to send us your core.
Some GM NP205's have two threaded holes on the side for a mount to the frame others do not. We do not recommend using the side mount regardless of whether the truck had it or not (the mount is so far from the center of the drivetrain that it makes the t-case mount nearly solid and contributes to broken adapters and transmission cases). For this reason, we do not guarantee that the remanufactured NP205 that you receive from us will have a provision for that mount.
Shipping is typically $150-200 in the lower 48 states. These are shipped through UPS as a normal package (they just barely squeak under the 150# limit) and can be delivered to a residential address.
These are built to order,
Need something unique like a GM input gear in a Ford NP205, or a female 29 spline input (not OE) to mate a GM/Dodge NP205 transfer case to your NV4500/5600/G56/Allison/etc., or any other non-factory combo? Give us a call.
Want to hook up an Offroad Design Magnum Underdrive to your NP205? Check them out here: Magnum Underdrive
This one's pretty simple.
1984 and older GM NP205's use an 8 bolt pattern shaped like a figure 8 or hourglass.
1985-1991 GM NP205's use a 6 bolt pattern in the shape of a circle.
Input Spline Count
10 spline - SM465 applications 1984 and older. These always use figure 8 pattern NP205's.
27 spline - All TH350 applications
Short 32 spline - 1984 and older TH400 applications (other than CUCV trucks)
Long 32 spline - 1985-1991 TH400 and SM465 applications, CUCV applications
Front Output Shaft
10 spline front output shaft - Factory on all GM NP205's up to about 1977.
30 spline front output shaft - Factory on all GM NP205's from about 1978 and up. This will be the non-synchro version (the synchro version is rare and parts are obsolete, they're only desirable if you have auto hubs anyway)
32 spline front output shaft - These never came in GM NP205's, but we can do it. This is the largest front output shaft, and also has the most aftermarket support for yokes (same 32 spline as the rear output).
Rear Output Shaft
Fixed yoke rear outputs are generally more desirable, you'll also hear these called a "bolt on" yoke. They're shorter (meaning your driveshaft is longer) and stronger than the slip yoke.
Slip yoke rear outputs came in some GM NP205's through the 80's, most that choose this option are replacing a factory NP205 that had one.
We can build your NP205 with either a cable output or an electric speed sensor.
Most older trucks use a cable driven speedometer.
With newer drivetrain swaps becoming more popular, we also have the option to replace the cable driven setup with an electric vehicle speed sensor if your engine or transmission needs the electric output. This puts out 40 pulses per revolution, the standard GM has maintained from 1988 to current.
Stock shift rails are simply factory shift rails, they work with either the stock shifter or a twin stick.
We can also build your NP205 with our new modified shift rails. We build these from scratch and machine them with a different profile. This, along with a twin stick, allows you to shift the front axle into high or low range while leaving the rear axle in neutral (i.e. front wheel drive only, or a "front dig"). The stock shift rails don't let you do that (even with a twin stick), the modified shift rails still prevent you from shifting the transfer case "wrong" (i.e. in high and low at the same time).