New Process 435



Advance Adapters Inc Transmission Data:

New Process 435 Transmissions

Manual Transmission
Forward Speeds ....
Dates Produced .... 1966 - 1992
Manufacturer .... New Process 
Case Length .... 10.87 
Stock Adapter Length .... N/A
Bellhousing Length ... 6.50
Over All Length .... 17.375 
Case Material ... Cast Iron
Input Shaft .... N/A
Spline .... 1-1/16 10 spline
Length .... 6.50 & 7.50 
Pilot Diameter .... .670
Length .... .875 
Output Shaft Spline .... 28 (2wd) & 31 (4wd) 
1st Gear Ratio .... 6.69 
2nd Gear Ratio .... 3.34 
3rd Gear Ratio .... 1.79 
4th Gear Ratio .... 1.00 
5th Gear Ratio .... N/A
6th Gear Ratio .... N/A
Reverse Gear Ratio .... 8.00 
Transmission Weight .... 135 
Max Engine Torque .... N/A
Fluid Type .... N/A
Fluid Capacity .... N/A
Power Take Off Capable .... yes 
Gross Vehicle Weight Rated .... N/A
Input to Cluster Center Distance .... N/A
all measurements are in inches and pounds unless specified.
Advance Adapters Transmission Rating
Our rating is (1) being the worst and (5)being the best. 
These ratings are based on vehicles with a 10,000 GVW. Jeeps and similar vehicles that are half the weight will be well suited with transmissions rated 3 and above on the strength.
Shifting Quality ....
Strength Quality ....

The New Process 435 is regarded as a heavy duty transmission. It has a large following of aftermarket parts and is abundant in the salvage yards.


The NP435 was used by Ford, GM, Dodge, and used in some industrial applications. The adapters we manufacture are designed to fit the Ford version of this transmission.


The Ford NP435 can be identified by its cast iron case and a PTO output on the passengers side. The Ford input is 1-1/6" 10 spline that sticks out the front of the transmission 6.50" long. Ford did have some shafts that were a 7.50" stickout. The front bearing retainer has a index diameter of 4.848" and has the standard bellhousing bolt pattern of 8.50" across the top and bottom of the transmission and 6.250" vertical on both sides of the transmission. The NP435 was used in both 2 and 4 wheel drive trucks. The bolt pattern on the back side of these transmissions was different between the 2 and 4WD models. Most of our adapters are dual drilled to fit both Ford models. The early Bronco is the only exception as it requires the 2WD model. The Ford NP435 can be found in Ford 1/2 ton, 3/4 ton, and 1 ton trucks from 1966 to 1992.


The Ford NP435 uses a tapered bearing on the front input shaft. The input bearing load is set by stacking gaskets under the bearing retainer. The aluminum shifter cover is bolted to the main case with 8 bolts, two are doweled. This transmission can pop out of gear due to worn shifter detent springs in the top cover. It is a good idea to replace these detent springs in the top cover and replace any other worn item. The shift fork pads should also be replaced when rebuilding this transmission.


The GM NP435 transmission can be used but requires machining on the transmission case to work with our adapter kits. The GM NP435 was used in trucks 1968 to 1972. The GM transmission did not use the deeper low first gear. These transmissions typically had a 4.56 or 4.90 low gear.