January 27, 2009okay, so my yoke went out on my back driveshaft in a 76 blazer. fixed that, and both u joints. now, when i put it into 2wd, it won''t power the back driveshaft but the front one spins. in 4wd the front driveshaft works, and back won''t. is it the linkage that is messed up, *or* possibly the transfercase? and if its the transfercase will a gear driven one fit in a blazer? and what would be the price range on one of the gear driven ones. i''ve talked to a few mechanics, and thats what they''ve told me, and a few haven''t even seen this before, so they said. i''ve been told that the gear t case is about 300 bucks.
January 27, 2009rebuild the tcase they are cheap.
January 27, 2009what transfercase do you have? that np203 is weird like that it sends power to whatever has the least amount of traction. but thats a full time case. like if you were to pull out your rear driveshaft it would send all the power to the rear in 4wd
January 27, 2009its the stock t case in the 76 blazer. its not full time 4wd *or* whatever. i spoke to some more guys, and i think we''re going to tear it down this weekend and figure it out. what part do ya''ll think might of caused it? before the ears on the yoke split, it would go into 4wd and 2wd like normal.
January 28, 2009the stock transfercase for that truck is the fulltime 203 case if you have a automatic transmission. i think the manuals might have came with a 205. but like usual many people converted it to work as a part time case. i had a blazer that had a 203 under it. the drivetrain came out of a 77 and it was converted before i got it. nothing but trouble with that dang case.
try to figure out what case you have. there should be a tag on the backside of the transfercase. if its a np205 its possible that it might be just the linkage. im not to familiar with them, i have one in the garage but never used it yet, it has two shift rails on it and its possible that one of them came loose. alot of offroad guys run that case cause you can run only power to the front if you want.
January 28, 2009oh alright, thanks. i''ll check all of that tomorrow during my shop class. i know its not fulltime 4wd though, must have been changed. its got lock outs.so yeah. i''m probably going to take the case off this weekend, and go through it. i have a chiltons mag to help. any advice? *or* things to look for?
January 29, 2009i cant really help with that i never tore to much into transfercases i usually just replace them.
but like i said (i think i said) check out the linkages just for obvious breakage. maybe shift it in all gears *or* have someone do it while you lay under the truck and look to make sure everything is moving, if everything seems fine then yeah its the case.
January 30, 2009alright i will do. i got a friend thats going to come over and help me, he works on the stuff for a living. thanks for the tips.
February 11, 2009the transfercase is perfectly fine. we think it won''t shift into gear, because the stick is a little loose and wobbles when its shifting. thats our last hope. any other ideas what it could be? we''re all down to our last guess here.
February 11, 2009when you sheared the ears off the yoke are you sure you didnt brake anything in the rear...
February 12, 2009it wouldn''t be anything on the rear i think, because the ears broke up on the part where it connects to the transfercase, and there isn''t anything broken at all on the transfercase. i don''t think there is a problem with the rearend beings it doesn''t give power on the back of the t case. would it be messed up on the rear end cause it to not put power on it? everything locks in on the case, and turns perfect when i have it out of the truck. but when it is in, the back part of the t case where it connects to the driveshaft will not spin. i didn''t think that the rearend could cause it to not spin at the tcase.