Some of you might remember my sons first project car. We finished that one a few years ago.
https://www.indianagunowners.com/forums/break-room/396053-any-gm-tranny-experts-out-there.html
We had a lot of fun with it. After 2 years of fun and driving it we decided to get another project for him. He did some trading and ended up with a 2006 GMC Yukon. It (of course) has issues or it wouldn't be a project.
Oil pressure gauge doesn't work. And the fuel gauge is DOA too. Those are issues we can take care of later. The 4 wheel drive is a bit more important.
A little history and a ideal of where I am at with it. The truck belonged to a friend that has had it for about 5-6 years. A few weeks ago he brought it over because it was making a noise. I jacked it up and the noise seemed like it was on the left front wheel. The wheel bearing was shot. It had a ton of play in it. He had his grandson change the bearing/hub. But that did not take care of all of the noise. He took it somewhere and they told him the 4 wheel drive had issues and it was gonna probably be expensive. He doesn't have the $$ to put in it. So we ended up with it at a really reasonable price.
When I got it home the display showed "Service 4 wheel drive" It would not shift in to 4 wheel drive. I pulled the fuse to reset the TCCM and after I put it back in I could hear the transfer case shifting. I jacked up all 4 corners and I could see the output shafts turning front and rear out of the transfer case. But the front axle wasn't locked, the front wheels did not spin. Upon closer inspection I notice the front diff actuator was unplugged. So I plugged it in and it would lock in and I could shift 2w/4w/4w low and All wheel drive. It I thought I was on to something good.
I drove it for about 2 miles and it sound great at first and it started making noise again. It sounds like a popping noise, like something is rolling around and catching. It doesn't seem to matter 2w/4w/4w low etc.
It takes a few miles to mess up. My first though was transfer case. Maybe the chain was slipping. I know there are known issues with this transfer case. We drove it this afternoon until it screwed up again. We got it up in the air and the noise sounds like it's in the front diff. The transfer case appears to be newer then the truck BTW. And I hear no noise from it. I put it in 2 wheel drive in the air and it's fine no noise. But then I switch in to 4 wheel and it grr's and growls in the front diff until it locks. And then it is not very quiet. And it makes a racket when it locks in and it also takes a moment to lock in.
I locked in the 4 wheel drive and had my boy hold the tire still and I rotated the front drivers side tire and the differential has what I think it's a ton of play. Here are a few videos of both sides. The axles seem fine. No play in the U joints.
[video=youtube;VWYo17YAi64]https://www.youtube.com/watch?v=VWYo17YAi64[/video]
https://www.youtube.com/watch?v=PK9WX-mVees
The amount of play seems extreme to me. What do you 4 wheel drive guys think? Front diff??
Thanks in advance for any advice.
https://www.indianagunowners.com/forums/break-room/396053-any-gm-tranny-experts-out-there.html
We had a lot of fun with it. After 2 years of fun and driving it we decided to get another project for him. He did some trading and ended up with a 2006 GMC Yukon. It (of course) has issues or it wouldn't be a project.
Oil pressure gauge doesn't work. And the fuel gauge is DOA too. Those are issues we can take care of later. The 4 wheel drive is a bit more important.
A little history and a ideal of where I am at with it. The truck belonged to a friend that has had it for about 5-6 years. A few weeks ago he brought it over because it was making a noise. I jacked it up and the noise seemed like it was on the left front wheel. The wheel bearing was shot. It had a ton of play in it. He had his grandson change the bearing/hub. But that did not take care of all of the noise. He took it somewhere and they told him the 4 wheel drive had issues and it was gonna probably be expensive. He doesn't have the $$ to put in it. So we ended up with it at a really reasonable price.
When I got it home the display showed "Service 4 wheel drive" It would not shift in to 4 wheel drive. I pulled the fuse to reset the TCCM and after I put it back in I could hear the transfer case shifting. I jacked up all 4 corners and I could see the output shafts turning front and rear out of the transfer case. But the front axle wasn't locked, the front wheels did not spin. Upon closer inspection I notice the front diff actuator was unplugged. So I plugged it in and it would lock in and I could shift 2w/4w/4w low and All wheel drive. It I thought I was on to something good.
I drove it for about 2 miles and it sound great at first and it started making noise again. It sounds like a popping noise, like something is rolling around and catching. It doesn't seem to matter 2w/4w/4w low etc.
It takes a few miles to mess up. My first though was transfer case. Maybe the chain was slipping. I know there are known issues with this transfer case. We drove it this afternoon until it screwed up again. We got it up in the air and the noise sounds like it's in the front diff. The transfer case appears to be newer then the truck BTW. And I hear no noise from it. I put it in 2 wheel drive in the air and it's fine no noise. But then I switch in to 4 wheel and it grr's and growls in the front diff until it locks. And then it is not very quiet. And it makes a racket when it locks in and it also takes a moment to lock in.
I locked in the 4 wheel drive and had my boy hold the tire still and I rotated the front drivers side tire and the differential has what I think it's a ton of play. Here are a few videos of both sides. The axles seem fine. No play in the U joints.
[video=youtube;VWYo17YAi64]https://www.youtube.com/watch?v=VWYo17YAi64[/video]
https://www.youtube.com/watch?v=PK9WX-mVees
The amount of play seems extreme to me. What do you 4 wheel drive guys think? Front diff??
Thanks in advance for any advice.
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