I blew the front differential on my 2120. Ring and pinion each lost a few teeth. Significant grinding sound. $1600 later it was all better and has been for about 15 years.
Andy
Has any one had this problem I have a grinding noise in the front end only if it is in 4wheel drive could it be the ring and pinion?
I'm no expert, so take this with a "grain of salt." It seems to me that the front axle and differential do the same things in 2wd or 4wd. The only difference would be back in the transmission at the transfer gear. The front axle and driveshaft turn all the time, but are only driven when the transfer gear is engaged. It just seems strange that you would experience noise only in 4wd. AndyMA, is this correct? You are surely the expert for this kind of problem.