Low Gear 4wd losing power!

jeep
cherokee

#1

I have a 93 Jeep Grand Cherokee 6 cylinder with full time 4 wheel drive. The problem is that when you switch it into the “Low” gear the car has very weak power when in drive. In reverse it seems to be normal and can pull itself out of the snow. I’m wondering if this is something very costly to fix and is it something that will eventually affect the normal driving gear.