I have recently bought a mile marker "make your own shaft type conversion kit" with locking hubs for my '77 K5 Blazer with a NP203. I brought it in to a shop that has put on about 25 of these and they said they don't recommend these kits because 2/3 of them came back for repairs on the transfer case. Have you ever heard of problems with the kits. I have also heard about rear output shaft kits for these. At 17 I have already learned about pouring a lot of money into your project. <font color="black"> </font color>
how long have you had the kit? is it the one that replaces the gears? i wonder if the local shop is just lazy, u'd think they'd want more money. i want the kit installed though so i will bring it some where else.
i guess i have had the kit 4 years or so and i am not easy on my stuff i built my truck to play with and that is what i do is play hard and it is the kit that replaces the gears. it is just a peace to join the shaft and the other gear together it is hard to explaine but there you go good luck
i heard the bad part is that the NP203 is chain driven and replacing the gears stops the chain which brings the lube to the main shaft and with no chain moving the shaft burns up and damage occurs. too keep it oiled u have to over fill the case or drive around in 4wheel drive at least once a week to keep it oiled
all you have to do is fill it up like normal and you will not have any trouble i kick mine into 4x4 every month or two if i have not used it to keep my u joints good. But like i said i have had this kit for 4 years and have never burnt any thing up so i guess it is up to you but good luck let me know with you find any more out or what you do .
I used the one made by doug nash its a solid one piece
shaft and was running a 454 with 36s and i was very heavy
on the throttle never had any problems with it. but it was
more expensive than the milemarker. But i dont know if
doug nash is even around anymore or was bought out.