transfer case questions

I have a rare 79 J20 jeep that I have owned for 23 years now and I pushed snow and towed with it for many many years. That truck has a Quadratrac full time Tcase and unlike other chain drive Tcases, both front AND rear axle is driven by a same chain. That truck has had a very hard life and there was some time I was pushing up long country lane thru 3 foot drifts with tire chains on all four wheels and over a ton of ballast in bed and pushing it for all it was worth and waited for it to break and it never did. Chain Tcases can be very tuff. THeir weakness is abuse not use and failure to service then regulalry with fresh oil. Abuse is putting big tires on truck with tall stock axle ratios and depending on low range to make it work. Funny thing is, I never have found in any owners manual that low range is for wrong tire size and axle ratio combo. (maybe they left that out huh?) Gear axles proper, service your 208 or 241 properly and it will live a long time.  

Np 208 weak???????????!!!!!!!!!!!!! you make it sound like a 10 bolt with 44 inc tires.......an np 208 is a respectable t case and as mentioned befor proper gearing in your axles and servie will make the case last as long as your truck!!!!!!  
Solid axle chevys can't be beat!
My dream truck: 73-91 chevy 3500 crew cab srw with dana 60/14bolt, 6 inc long travel lift with KING shocks, 37 inc tires and a 24v cummins diesel, nv5600 and np205

Hey I was around when 208 first came out and I was apprehensive about them. What happened is when they came out they were also putting tall gears in a lot of trucks for EPA MPG tests which increased strain on them. Then throw in some big tires and stress gets very high on them. (the deeper low range in them did not help because it made tall tire/axle ratio combos seem to be okay) Also many never even bother to change fluid in them too which is important in a chain driven Tcase. Again if you use proper axle ratios for tire size and usage and service fluid in them, they will live a long life. People you see having trouble with them are ones that do not follow this practice (just like those than blow 700R4 and blame tranny, not their taller effective gear ratios.  

Hey snowman or any one else for that matter i swapped a 14 bolt 9 1/2 in ring gear rear into my truck and am super upset because i cant find a diff cover from rockcrusher or solid anywhere. They say that it is not a true 3/4 ton rear. My ? is do know if the 14 bolt i put in my truck is even any stroger than the ten bolt i just took out and whats the difference between the 9 1/2 and the 10 1/2. another thing does anyone know where to get a good cast iron diff cover for the 9 1/2 that looks good, no chrome  

Who ever told you that it is not a try 3/4 ton rear axle did not know wheat they are talking about. That axle say a lot of use in 3/4 ton P/U's, 1 ton vans and even made it in a few 1 ton SRW P/U's too. Been around since about 1973. It has bigger axle shaft than most stock D60 which tend to come to 1.31 diameter axles (a few have 1.5's) and 9.5 has 1.39 inch diameter axles. It is arleast the equal of most 60's and has a lot more after market locker and LSD options than 10.5 too. There is only one main version of 9.5 and sub version differ only in bolt pattern on hub. Otherwise they are the same and it has a rated load capacity of around 3 ton too. 10 bolts are rated 2 tons at most and some less. Need to look for another supplier to get what you need because that one wants to sell you what he has, not what you need.