To shift a transfer case from high to low range, the driver typically needs to engage the vehicle's neutral gear, ensuring it is not under load. This may involve pressing a button or pulling a lever, depending on the vehicle's design. Once in neutral, the shift can be completed, allowing the transfer case to engage the low range, which provides increased torque for off-road conditions. After the shift, the vehicle can be put back into gear to drive in low range.
Assuming you're referring to the transfer case gear shift, it should be in "high" for normal use
On the transmission selector you put your shifter in neutral position and then you can move the transfer case selector to high or low.
2 wheel low 4 wheel low Neutral 4 wheel high 2 wheel high
from bottom to tom; 4 low loc, 4 low, neutral, 4 high, 4 high loc
The 1978 Jeep CJ5 typically features a Dana 20 transfer case, which has a shift pattern that includes two-wheel drive (2WD), four-wheel drive high (4WD High), and four-wheel drive low (4WD Low). The shift lever is usually located on the floor and can be moved between these positions. The standard shift pattern is often labeled: 2WD is in the rear position, 4WD High is in the middle, and 4WD Low is at the front. Always refer to the owner's manual for specific details related to the vehicle.
The transfer case does, yes.
The shift pattern for the transfer case on a 1989 Jeep Wrangler typically includes options for 2WD, 4WD High (4H), and 4WD Low (4L). The transfer case lever is usually shifted from 2H to 4H while the vehicle is in motion at low speeds, and 4L is engaged when the vehicle is stopped or moving very slowly. The exact configuration may vary slightly based on whether the Wrangler is equipped with the NP231 or NP205 transfer case. Always refer to the owner's manual for specific instructions and recommendations.
put it in neutral then shift to 2wd
possible bent shifting fork in the transfer case, possible electical issues. I'd suggest taking it to a reputable shop to have it checked out.
Move the drive shift to Neutral then move the 4x4 shifter into 4W High or 4W low. Afterwards move the drive shift to drive. This is the best way; it reduces torque on the transfer case, therefore extending its life.
Did you try putting gear shift in "neutral" when shifting into 4 WD Low?
The problem is most likely in the transfer case or the linkage. The transfer case is bolted to the rear of the transmission on that truck. The linkage could be misadjusted, there should be three distinct positions for the transfer case, Neutral, Low and High. If you suspect the linkage disconnect the linkage and manually put the transfer case in each position and try it to see if it works, if it does it's the linkage if not the problem is in the transfer case itself.