MasterChief
Newbie
84 M1009 CUCV Blazer w/6.2
Hi all, I'm having a heck of a problem when I engage the 4 wheel drive. I'm in the Navy and this all started many months back when I was stationed on Guam. I had been 4 wheeling many times out in the jungle with no problems, then one day the transmission goes out. I had it rebuilt locally and when I got it back, I did a few "improvements", one of which was to change the stock hubs to Milemarker hubs. They installed fine, but I did not get to go 4 wheeling again before I had to ship my rig on to my next duty station - Bahrain. It sat outside the shipping warehouse in the 125 degree plus heat in Bahrain for about 6 months before I finally arrived. Once I was fully checked in and had the family and household in order, I took the Blazer out to the local desert here to play a bit. Thats when I first noticed the problem. I engage the hubs, put the transfer case in 4 high/4 low, then as I tool about I could clearly hear a popping/bumping sound from the front axle. My first thought was the u-joints, and one was going bad anyway, so I had all 7 replaced. I tried to 4 wheel again and got the same sounds. I then thought that maybe I had installed the MileMarker hubs wrong, so I took them off, checked all the parts inside the hubs, saw that everything seemed to slide in and out correctly, and reassembled them. I did note that when I took the right side off, the sliding gear in the hub would not slide in at all. I removed the hub and re-oriented the gear teeth between the hub/slider/center gear and then it lined up correctly and seemed to work fine. I reassembled/reinstalled it and tried the 4 wheeling again, same problem, same noise. It gets loud when I turn and seems to go away when I go straight. It sounds like the wheels are not synchronized or something and the axle shaft is stressing, then popping the wheel fwd to catch-up with the other wheel. Needless to say I took these tests pretty slow and easy, but am left wondering:
1. The 4 wheel drive worked fine before the trans overhaul and the hub change.
2. Could the hubs be the problem, even though they seem to be engaging the hub slide gear correctly?
3. Maybe the trans guy mis-aligned something when he took the trans and transfer case out to overhaul the transmission. Could he have mis-installed the transfer case?
4. Could an axle be twisted somehow?
Sorry this was so long but being without the 4x4 option sucks here in Bahrain. Anyone with any ideas on what to check and what to fix, please let me know.
Thanks,
MNCM(SW) Jerry Williams
Command Master Chief
USS Cardinal (MHC-60)
Bahrain, Arabian Gulf
Hi all, I'm having a heck of a problem when I engage the 4 wheel drive. I'm in the Navy and this all started many months back when I was stationed on Guam. I had been 4 wheeling many times out in the jungle with no problems, then one day the transmission goes out. I had it rebuilt locally and when I got it back, I did a few "improvements", one of which was to change the stock hubs to Milemarker hubs. They installed fine, but I did not get to go 4 wheeling again before I had to ship my rig on to my next duty station - Bahrain. It sat outside the shipping warehouse in the 125 degree plus heat in Bahrain for about 6 months before I finally arrived. Once I was fully checked in and had the family and household in order, I took the Blazer out to the local desert here to play a bit. Thats when I first noticed the problem. I engage the hubs, put the transfer case in 4 high/4 low, then as I tool about I could clearly hear a popping/bumping sound from the front axle. My first thought was the u-joints, and one was going bad anyway, so I had all 7 replaced. I tried to 4 wheel again and got the same sounds. I then thought that maybe I had installed the MileMarker hubs wrong, so I took them off, checked all the parts inside the hubs, saw that everything seemed to slide in and out correctly, and reassembled them. I did note that when I took the right side off, the sliding gear in the hub would not slide in at all. I removed the hub and re-oriented the gear teeth between the hub/slider/center gear and then it lined up correctly and seemed to work fine. I reassembled/reinstalled it and tried the 4 wheeling again, same problem, same noise. It gets loud when I turn and seems to go away when I go straight. It sounds like the wheels are not synchronized or something and the axle shaft is stressing, then popping the wheel fwd to catch-up with the other wheel. Needless to say I took these tests pretty slow and easy, but am left wondering:
1. The 4 wheel drive worked fine before the trans overhaul and the hub change.
2. Could the hubs be the problem, even though they seem to be engaging the hub slide gear correctly?
3. Maybe the trans guy mis-aligned something when he took the trans and transfer case out to overhaul the transmission. Could he have mis-installed the transfer case?
4. Could an axle be twisted somehow?
Sorry this was so long but being without the 4x4 option sucks here in Bahrain. Anyone with any ideas on what to check and what to fix, please let me know.
Thanks,
MNCM(SW) Jerry Williams
Command Master Chief
USS Cardinal (MHC-60)
Bahrain, Arabian Gulf
