Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I've been under it when it was running and I don't recall the front shaft turning. Otherwise the front differential would be engaged. So my theory is the chain only turns via the clutch pack when 4 wheel drive is engaged. So therefore, that noise wouldn't be chain slap but pump knock instead. Hopefully someone with the knowledge will chime in.
Guess that explains why there's two speed sensors right? I've never driven it in Auto, or put it in Neutral. I'll try that but 1st I think I should refill it with fluid. I'll try to pick some up tomorrow. And it makes sense the front shaft would turn while rolling. I had the "Service 4 Wheel Drive" warning on but I believed that was because I had the ABS Fuse pulled so we could drive it. Otherwise it "self corrected". That was until I replaced the Steering Wheel Position Sensor. After that was replaced and I put the ABS Fuse back in and cleared all the codes it ran fine. Other than my wife smoking the rotors and brake pads. LOL!
Thank you Fless for sharing this article. It's great! Now if I can just find an in depth TC Rebuild book. One local place I called quoted me $1600+ for a Remanufactured TC with a 3-4 week lead time. A rebuild kit can be bought for $350.
It sounds like the flex plate is either cracked or a bolt has loosened up. St least take the inspection cover off, and look to see if that's the case.
Ken thanks for your advice. I did inspect the flex plate as well as the torque converter bolts. After starting it up again I'm convinced the noise is coming from the transfer case. I can actually feel it there with my hand. My video is the length of the noise in park in this instance. Changing gears, drive, reverse, neutral, etc, the knocking only lasts 10 seconds or so.
Thanks Fless! I'd be dumb enough to hold the encoder in my hand to see if it cycled! LOL! I'll update.
If it's cheap enough I'd do it--mihht as well while it's apart.
That's what I'm struggling with. My Darned OCD has me going back and forth. $50 is the least expensive clutch pack I can find and $35 for a pump. But that blows the heck out of a Benjamin right? And here's the real head scratcher, buy a new rear half case that's the "reinforced, improved" version and they still recommend a case saver for the pump wear issues. That's cheap enough but why then buy a "reinforced" case? My thought process is if it sounds like chain drag (which I really don't see how) or pump knock, then I'm covered and can return the case if I don't need it. I really hate my brain. LOL!
To me, my labor is worth a lot more than a couple hundred in parts. I’m not ok with doing things twice or doing them halfway. I figure with the labor I’m saving, part of that money can go into better parts and I’m ahead in more ways than one. Once you’ve pulled that thing out, you won’t want to do it again, believe me. There isn’t a jack made that can get that thing into position so you get to bench press it.
