I own a 1987 jeep wrangler 2.5L.I bought about a month ago it was running great. I put it into 4wd and put it back in 2 Hi no problem was driving fine for a bout a. week or two and then started making a really loud bang when drivingm Take off, reverse, deaccel. Checked transfer case shifter likage missing a bolt replaced the bolt. But the linkage could ve too long, from the person before it looks fairly new. Could that be the problem? So nothing happend after me and my dad did that then we greased all the u bolts. Nothin. Changed Tranny Fluid and transfer case fluid NOTHIN!!! Please Help