The 448 was launched in 1980 with a 2-inch longer frame from previous years' 400 series and all Big Wheel models from here out would be "Long Frame". The longer frame was to accommodate the very heavy-duty huge 60-inch commercial deck. Also for the model year 1980, they had hood scoops for the 448 only. The 448 was powered by a very strong 18-horsepower twin-cylinder Onan engine. The 18 horsepower was nearly a 50 cubic inch engine. The 448 is a great model and one many want to own. There is very little the 448 can not get done and will do more than most competitor tractors its size or bigger! It was produced roughly 10 years until the 4000 series came out and the 4018 was its successor as the new Big Wheel 18 horsepower model, but the New Big Dog would be the 4020. The 448 could be equipped with a 44, 48, or 60-inch mower deck. 44 or 54-inch plow/dozer blade, 38 or 48 snow castor, or any of the other Case Ingersoll attachments available or any of the CAT 0 three-point hitch attachments.

The 446 is powered by the massive big torque 2-cylinder industrial Onan engine that is 16 horsepower. It is the same engine as the 226. The 16-horse has significantly more power than the smaller 200 series and 444 engines. With the 2-cylinder engine, it is no surprise.  With the 16 horsepower, it enables the 446 to take on all attachments available Capable of running a 38 or 48-inch snow blower; 44, 48 or 60-inch (long frames only) mower, and the big 44 and 54-inch plow/dozer blade. This is the most common Big Wheel model,  as it was produced from the early 1970s to the late 1980s and was a favorite of Case Ingersoll owners and followers.

The 444 is powered by a single-cylinder Kohler "K" series 14 horsepower engine.  With the 14 horsepower and the big wheels, it is ready to take on big jobs as well as the bigger attachments available. Capable of running 38 or 48-inch snow blower, 44, and 48-inch mowers are recommended though many long-frame 444 have been known to mow grass with 60-inch decks. They will push the 44" and big 54-inch plow/dozer blade just fine as well. Though less torque and power overall than its big brothers with Onan 2 cylinders, do not be fooled this 1-cylinder worker bee will do just about anything you can put in front of it, just maybe a little slower than the 446, or 448 that's all. It will also use less fuel than the big boys and maintenance costs are less as well. The 444 was built from the early '70s to late '80s, and the 442 and 444PK from the late '60s and very early '70s were very similar tractors but also had some differences as well.

The 444 was powered by the BIG (at the time) Kohler "K" Series 14 horsepower single-cylinder engine that was used for many decades. Looking back the PK models 220/222/442/444 were more like hybrids during the cross over years from 155/195 to the 200/400 series. they had a lot in common with both series. But the stuff they had in common with the older series was quickly phased out as better and newer designs came to be like the famed and fast snap fast attachment system that came to be in 71/72 and was used for 40 years! The hydraulics setup and the system were upgraded significantly after the PK models as well as the attachments themselves. Styling continued to change in the next generation as well from seats to fenders as the "Elephant ear fenders were dropped on the big wheel series. Rubber-isolated motor mounts were used now after the PK tractors, the PTO engagement system too was changed after the PK tractors.  Some of the early next-gen 200 and 400 series in 70/71/72 seemed to have some of these changes and some not as they must have been using up inventory and tooling. It seems everything was pretty well changed over in 1973.

The  Performance Kings "PK" were the beginning of history being made. They were styled like the new 70 series AG farm tractors as the previous models 155/195 etc were styled after the 30 series AG farm tractors. The PK and the new 200 and 400 series were game changers with styling, construction, design, and engineering. They were the foundation for the later 200, 400, 3000, and 4000 series.  They came out in 1969. This was basically an all Case design/upgrade from the Colt tractors they bought out. The 442 was powered by the classic 12-horsepower Kohler "K" When released.  These intimidating-looking hard-working beasts from  Wisconsin USA were a popular hit with homeowners, farmers, and commercial, and municipal operations alike. All wanted them as they matched the fleet of the bigger full-size Case equipment.