Powertrain humming under load at high speed - Page 2 - Chevy and GMC Duramax Diesel Forum
06-07 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #11 of 14 (permalink) Old 02-07-2016, 08:16 PM
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Originally Posted by SamBroom View Post
I took another look today and did notice something I was wondering about, the shaft is two peices and at the split, it goes through a bearing loop that is bolted to the frame. I can wiggle the shaft pretty substantially inside that loop. Potentially my problem?
I think that could be your issue. I'll look into it some more. Sadly I don't have a two piece drive shaft so I know that isn't my problem.

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post #12 of 14 (permalink) Old 02-08-2016, 01:19 PM Thread Starter
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SOLVED. After taking a ride with a mechanic and getting his confirmation that the issue was definitly in the driveline, i took it home and pulled down the shaft to inspect it. Unfortunately, I can't tell you exactly what the issue was, because I tackled two together. First, the front u joint had an obviously bad bearing. It was catching at a certain point and took some effort to push through the rough spot. Second, the rubber mounthe around the carrier bearing was SHOT. I replaced both the carrier bearing and the front u joint. And now it rides like a dream. I attached some pics of the hashed carrier bearing.
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post #13 of 14 (permalink) Old 02-08-2016, 03:18 PM
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Delete Delete Delete

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post #14 of 14 (permalink) Old 02-08-2016, 03:24 PM
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Nice work!

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|Airbox Mod|PCV Reroute|Nictane FFA|AD2-150 w/ Bean's Sump|SDP EGR Delete|MBRP 4" Exhaust & DP|EFI-Live|TransGo Jr|Pump Rub Fix
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