What is a good transfer case ratio?

The high-range is most often a 1:1 ratio. That is to say that for every revolution of the transmission output shaft, the front and rear transfer case outputs rotate one revolution. Factory low-range ratios can vary from about 2:1 to about 4:1.

What is the difference between the NP271 and NP273?

NP271 or NP273, What’s the Diff? The NP271 that we used for this story uses a manual, floor-mounted shift lever, while the NP273 is essentially the same transfer case with an electric shift motor. The NP273 also adds a synchro ring for shift-on-the-fly capabilities.

What is a NP271 transfer case?

The NP271 transfer case is chain driven with an aluminum casing, having two gears and a six pinion planetary gear set. It is used for heavier duty applications, such as the Ford F-Series, from the 250 and above, as well as the Ford Excursion.

What gear ratio is a 208 transfer case?

2.61:1
The New Process 208 is a chain-driven transfer case. This is a cast aluminum transfer case. Compared to the NP203 and NP205, the light-weight cast aluminum housing of this transfer case is easier to handle. This transfer case is a good gear box with a low ratio of 2.61:1.

How do I know if my transfer case is good?

Here we look at some of the more common signs you may find when you have a bad transfer case:

1. Shifting Issues.
2. Hard to stay in 4WD?
3. 4WD Won’t Engage or Disengage.
4. Fluid Puddle Under the Transfer Case’s Location.
5. Strange Grinding, Growling or Humming Noises.
6. Possible Causes of a Bad Transfer Case.
7. So why S&G?

Is the NP205 chain driven?

In 1971, New Process introduced a model NP203 (chain-driven), and NP205 (gear-driven) transfer case. Both of these transfer cases used various input splines.

What transfer cases are gear driven?

Transfer cases that do not have a chain and use direct gear contact are called “gear drive” transfer cases. Transfer cases installed into trucks with automatic transmission, and/or V6 engines are usually chain drive style.

What’s the difference between NP205 and NP208?

NP205= gear driven, cast iron case, 1.96:1 low, very strong T-case. NP208= chain driven, aluminum cased 2.6:1 or so low range not so strong and vulnerable to rocks due to aluminum case.

How many quarts does a 208 transfer hold?

RE: NP-208 fluid capacity The type of fluid should just be regular ATF. Your looking at somewhere around 4.5 quarts (9 pints) of fluid to fully fill an NP208 transfer case.

Can I use gear oil in my transfer case?

Transfer cases may be filled with gear oil, automatic transmission fluid (ATF), or specialty lubricants. The fluid level and condition should also be inspected, as transfer case fluid may leak from the output shaft seals, input shaft seal, case gaskets, or fluid inspection and drain plug gaskets.

How many spline are in a Ford np271 transfer case?

The units have different input spline counts: Dodges have 23 and 29 spline inputs. Ford uses 24 spline with manual transmissions and 31 and 34 spline units. Both Dodge and Ford NP271 transfer cases have driveside drops.

What is the ratio of nv271 transfer cases?

The NP271 is a heavy duty version has a 6 pinion planet and relies on a 1.5″ wide chain, specifically designed for durability with emphasis for high strength and lon-term durabiliity. The NP271 has 2.72:1 ratio, and has a aluminum case has either 4WD partl-time manual shift.

Is the pnp271 a part time transfer case?

Transfer Cases are tested pNP271 dodge and ford transfer case replacements and partsrior to leaving the factory. This model is a chain driven manual shift and part time transfer case. The output is on the driver-side with center rear output. This unit has been utilized in Dodge and Ford pickup trucks F250, F350, F450 and F550 from1999-Up.

What kind of transmission does a Ford np271 have?

The NP271 has 2.72:1 ratio, and has a aluminum case has either 4WD partl-time manual shift. The units have different input spline counts: Dodges have 23 and 29 spline inputs. Ford uses 24 spline with manual transmissions and 31 and 34 spline units. Both Dodge and Ford NP271 transfer cases have driveside drops.