All LB7 owners need to do this!!

Duramaxxer28 · 01-17-2013, 08:31 AM

I never heard of this problem until it happened to me..
I was driving down the highway, not loaded with the cruise at 70 when a vibration started all of the sudden. So I slowed down until the vibration went away and drove the last mile to my destination. When I got out of the truck I found all of my tranny fluid pouring out on the ground. I had one of the 4 bearings on a u-joint go bad and the small amount of vibration broke the rear housing on the transmission. It it almost $700 dollars in parts, so:
Have you replaced your u-joints yet?
If not it may be time to replace them or it is time for you to get a rear housing brace like ATP and Merchant Auto sells for around $160-$190
Learn from my experience, and spend the money now to fix it before you get the big bill.

:

hvactech · 01-17-2013, 08:36 AM

Not if ya got a zf6!

Runs2rch · 01-17-2013, 08:47 AM

U joints are always over looked until there is a vibe. I have some on the bench waiting to go in. The Delco's are priced well and made in the USA.

Duramaxxer28 · 01-17-2013, 09:15 AM

Yeah it wasn't even a bad vib and I slowed down pretty fast so I can't believe it broke that easy!

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daword2011 · 01-17-2013, 09:49 AM

Aluminum isn't the toughest metal haha. If you think how fast that thing is spinning I can see where the forces came from. How many miles on the u-joints?

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Duramaxxer28 · 01-17-2013, 10:03 AM

True but u joints used to go bad all the time and nothing else broke normally. I bought the truck with 135000 on it and don't know if they were ever changed. I know u joints wear out but just the fact that only one bearing was bad of the 8 was a little redic.

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daword2011 · 01-17-2013, 10:35 AM

What miles were you at when they popped? Got 200,000 on my original ones... You're scaring me haha

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boostnlb7 · 01-17-2013, 10:48 AM

front u joint or rear? on the rear driveshaft

Duramaxxer28 · 01-17-2013, 11:24 AM

The rear.

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Duramaxxer28 · 01-17-2013, 11:24 AM

It still has less than 140,000 miles on it.

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01-17-2013, 08:31 AM	eBay Motors #1 (permalink)
Duramaxxer28 Junior Member Join Date: Jun 2011 Location: Johnstown Pa Posts: 115	All LB7 owners need to do this!! I never heard of this problem until it happened to me.. I was driving down the highway, not loaded with the cruise at 70 when a vibration started all of the sudden. So I slowed down until the vibration went away and drove the last mile to my destination. When I got out of the truck I found all of my tranny fluid pouring out on the ground. I had one of the 4 bearings on a u-joint go bad and the small amount of vibration broke the rear housing on the transmission. It it almost $700 dollars in parts, so: Have you replaced your u-joints yet? If not it may be time to replace them or it is time for you to get a rear housing brace like ATP and Merchant Auto sells for around $160-$190 Learn from my experience, and spend the money now to fix it before you get the big bill. : __________________ '03 2500 HD : Banks: 6-Gun Power PDA, Big head waste gait, air intake lid, tie rod sleeves, 4x4 brackets, Nitto 305/70/16, Silverdine 5" Duals

01-17-2013, 08:36 AM	eBay Motors #2 (permalink)
hvactech Junior Member Join Date: Feb 2011 Location: Pendleton Posts: 166	Not if ya got a zf6! __________________ 2001 RC/lb lb7 zf6 EFI 120hp tune. 5" exhaust, Custom Boost Valve Holly Lift pump, Dual Filtration system,Custom Traction Bars 16" method race wheels w/ BFG allterrains Blad tires and clutch slippage thanks to sheid Diesel extravaganza 2012

01-17-2013, 09:15 AM	eBay Motors #4 (permalink)
Duramaxxer28 Junior Member Join Date: Jun 2011 Location: Johnstown Pa Posts: 115	Yeah it wasn't even a bad vib and I slowed down pretty fast so I can't believe it broke that easy! Sent from my iPhone using AutoGuide.com Free App __________________ '03 2500 HD : Banks: 6-Gun Power PDA, Big head waste gait, air intake lid, tie rod sleeves, 4x4 brackets, Nitto 305/70/16, Silverdine 5" Duals

01-17-2013, 09:49 AM	eBay Motors #5 (permalink)
daword2011 DuramaxForum Veteran Join Date: Feb 2010 Location: College Station, Tx Posts: 1,086	Aluminum isn't the toughest metal haha. If you think how fast that thing is spinning I can see where the forces came from. How many miles on the u-joints? Sent from my iPhone using AutoGuide.com App __________________ -Austin- Fightin' Texas Aggie 2001 LB7 2500HD CC/SB 2WD 5" Flo~Pro Straight w/ 7" Tip\| ProFab Intake Horn \|Spectre Stage-2 CAI \| EFI Live w/ DSP-5 \| PPE Stage IV Transmission \| ProFab Downpipe \| PPE Boost Valve \| Holley Black Lift Pump \| Intake Heater Delete \| GlowShift Guages (Boost, Pyro, & Fuel Pressure) \| 3" Drop Shackles \| 18x9 Falken ORC 952's \| Nitto Terra Grapplers 285/65/r18 \| Kenwood Deck \| 2 12" Kenwood Subs on 2200watts \| 4 6-1/2" Pioneers (Doors) on 350watts \| JML 6000k HID Lo-Hi/Fog \| Herculiner Bedliner \| Westin Side Steps \| Ranch Hand Full Front and Rear Bumper Replacement. 546hp & 1025 ft/lbs at Lone Star Dyno, Spring Branch Tx.

01-17-2013, 10:03 AM	eBay Motors #6 (permalink)
Duramaxxer28 Junior Member Join Date: Jun 2011 Location: Johnstown Pa Posts: 115	True but u joints used to go bad all the time and nothing else broke normally. I bought the truck with 135000 on it and don't know if they were ever changed. I know u joints wear out but just the fact that only one bearing was bad of the 8 was a little redic. Sent from my iPhone using AutoGuide.com Free App __________________ '03 2500 HD : Banks: 6-Gun Power PDA, Big head waste gait, air intake lid, tie rod sleeves, 4x4 brackets, Nitto 305/70/16, Silverdine 5" Duals

01-17-2013, 08:47 AM	eBay Motors #3 (permalink)
Runs2rch Junior Member Join Date: Apr 2012 Posts: 98	U joints are always over looked until there is a vibe. I have some on the bench waiting to go in. The Delco's are priced well and made in the USA.

01-17-2013, 10:35 AM	eBay Motors #7 (permalink)
daword2011 DuramaxForum Veteran Join Date: Feb 2010 Location: College Station, Tx Posts: 1,086	What miles were you at when they popped? Got 200,000 on my original ones... You're scaring me haha Sent from my iPhone using AutoGuide.com App __________________ -Austin- Fightin' Texas Aggie 2001 LB7 2500HD CC/SB 2WD 5" Flo~Pro Straight w/ 7" Tip\| ProFab Intake Horn \|Spectre Stage-2 CAI \| EFI Live w/ DSP-5 \| PPE Stage IV Transmission \| ProFab Downpipe \| PPE Boost Valve \| Holley Black Lift Pump \| Intake Heater Delete \| GlowShift Guages (Boost, Pyro, & Fuel Pressure) \| 3" Drop Shackles \| 18x9 Falken ORC 952's \| Nitto Terra Grapplers 285/65/r18 \| Kenwood Deck \| 2 12" Kenwood Subs on 2200watts \| 4 6-1/2" Pioneers (Doors) on 350watts \| JML 6000k HID Lo-Hi/Fog \| Herculiner Bedliner \| Westin Side Steps \| Ranch Hand Full Front and Rear Bumper Replacement. 546hp & 1025 ft/lbs at Lone Star Dyno, Spring Branch Tx.

01-17-2013, 10:48 AM	eBay Motors #8 (permalink)
boostnlb7 DuramaxForum Veteran Join Date: Nov 2012 Location: in the woods of michigan Posts: 1,113	front u joint or rear? on the rear driveshaft __________________ couldnt pass hazing to be a "pup bro" 03 lb7 ccsb 4x4-6" bds- 20"mkw's- p195/65/14 intercos- auto meter boost/pyro/trans gauges- traction bars- 5'' DE straight pipe- PPE BIV- AD II 200 lift pump- edge insight CTS- spectre CAI- 45% over injectors- LMM cp3 & FPR -EFI live dsp5 flashed by tony burkhard with danville tunes- thanks to Brent @ Lincoln Diesel

01-17-2013, 11:24 AM	eBay Motors #9 (permalink)
Duramaxxer28 Junior Member Join Date: Jun 2011 Location: Johnstown Pa Posts: 115	The rear. Sent from my iPhone using AutoGuide.com Free App __________________ '03 2500 HD : Banks: 6-Gun Power PDA, Big head waste gait, air intake lid, tie rod sleeves, 4x4 brackets, Nitto 305/70/16, Silverdine 5" Duals

01-17-2013, 11:24 AM	eBay Motors #10 (permalink)
Duramaxxer28 Junior Member Join Date: Jun 2011 Location: Johnstown Pa Posts: 115	It still has less than 140,000 miles on it. Sent from my iPhone using AutoGuide.com Free App __________________ '03 2500 HD : Banks: 6-Gun Power PDA, Big head waste gait, air intake lid, tie rod sleeves, 4x4 brackets, Nitto 305/70/16, Silverdine 5" Duals

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