hmmmm rattle rattle... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dropped81 · 08-22-2011, 01:04 AM

Hey guys i was driving my truck tonight and i noticed a noise i have never heard before its a typr of rattle coming from the rear and its not my tailgate rattling...i know my pinion seal is bad do you think it could be the pinion bearing or could it be the carrier bearing...i dont know if i just noticed it because it was quiet outside or if it just showed up but i can also only hear it when im doing about 15-20 mph after that it goes away...any help would be appreciated thanks! Mike!

CrazyJesster · 08-22-2011, 01:43 AM

just a thought i might be wrong could it be loose exhaust hanger?? or the spare tire hanger?? dunno just a thought

dropped81 · 08-22-2011, 02:36 AM

nah not the exhaust hanger i actully just had those rewelded a few months ago and i dont have a spare tire or spare tire hanger....also could it be a bad wheel bearing?

Black 'n' Blue · 08-22-2011, 05:25 AM

If you only hear the noise while going a certain speed, there's a 65% chance that its something in the drive line. I would check the wheel bearings, but I'm leaning more towards something inside the rear diff. From my experiences wheels bearing don't rattle they grind more.

dropped81 · 08-22-2011, 11:32 AM

ok so does it sound kinda like a pinion bearing?

Fixwhataintbroke · 08-22-2011, 04:28 PM

You can always jack the rear end up so both tires are off the ground, block the front tires, start the truck, put it in gear, have someone give it a little gas, and CAREFULLY look and listen to the back end.

slammedLT1 · 08-22-2011, 05:17 PM

If that seals bad who knows how much dust and dirt could be visiting the races of that pinion bearing and contaminating your diff fluid.

dropped81 · 08-22-2011, 07:20 PM

hmmm ok i think ill try and change the seal and bearing here in the next few days anybody know if its a difficult process or not?

slammedLT1 · 08-22-2011, 10:07 PM

one thing thats for sure you need to set the proper bearing preload. did a quick search on google and found this http://www.differentials.com/install.html but someone on here can prolly give a more simplistic explanation for ya . I was always told a few crush sleeves come in handy when its goin back together if you dont't get the correct pinion depth. Can't be that crazy tho its just an old chevy rear end!

dropped81 · 08-22-2011, 10:11 PM

Quote:

Originally Posted by slammedLT1

one thing thats for sure you need to set the proper bearing preload. did a quick search on google and found this http://www.differentials.com/install.html but someone on here can prolly give a more simplistic explanation for ya . I was always told a few crush sleeves come in handy when its goin back together if you dont't get the correct pinion depth. Can't be that crazy tho its just an old chevy rear end!

Thanks for the link LT1 ill be sure to read through it carefully!

383Chevy · 08-22-2011, 10:47 PM

Prolly your rear axle mine went out cause the tards who owned the truck before me did tighten all the guts in the axle so it went had to get new gears

dropped81 · 08-22-2011, 11:06 PM

if you dont mind me asking what did the guts run you price wise?

383Chevy · 08-22-2011, 11:15 PM

Quote:

Originally Posted by dropped81

if you dont mind me asking what did the guts run you price wise?

Depends on the gearing? i just stuck 3.23 in mine for now i got them for $20 and already had my locker from the old gears. what kind are ya lookin for?

dropped81 · 08-22-2011, 11:24 PM

im not really sure what im wanting to put in the rear and im new to all this stuff so i dont know to much about rear ends or really anything to be honest with you...and recommendations?

383Chevy · 08-22-2011, 11:46 PM

Quote:

Originally Posted by dropped81

im not really sure what im wanting to put in the rear and im new to all this stuff so i dont know to much about rear ends or really anything to be honest with you...and recommendations?

3.73's new froms jegs is $203 and thats either yukons or richmonds but i would look around on craigslist should be able to find some on there cheaper

slammedLT1 · 08-22-2011, 11:59 PM

Im sure if your pinion bearing is shot u should be able to get some play out of it by lifting up and down on the pinion. "Fixwhataintbroke" had a great suggestion to run the truck carefully on some jackstands and listen for any noise. Don't go buy gears with out inspecting whats in there first. Hopefully all goes well bud.

dropped81 · 08-23-2011, 12:39 AM

Thanks for all the help guys...

08-22-2011, 01:04 AM	#1
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	hmmmm rattle rattle... Hey guys i was driving my truck tonight and i noticed a noise i have never heard before its a typr of rattle coming from the rear and its not my tailgate rattling...i know my pinion seal is bad do you think it could be the pinion bearing or could it be the carrier bearing...i dont know if i just noticed it because it was quiet outside or if it just showed up but i can also only hear it when im doing about 15-20 mph after that it goes away...any help would be appreciated thanks! Mike!

08-22-2011, 01:43 AM	#2
CrazyJesster Registered User Join Date: Feb 2003 Location: Abilene Texas Posts: 557	Re: hmmmm rattle rattle... just a thought i might be wrong could it be loose exhaust hanger?? or the spare tire hanger?? dunno just a thought __________________ Project 82 ReBoRn http://67-72chevytrucks.com/vboard/s...d.php?t=441842

08-22-2011, 02:36 AM	#3
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... nah not the exhaust hanger i actully just had those rewelded a few months ago and i dont have a spare tire or spare tire hanger....also could it be a bad wheel bearing?

08-22-2011, 05:25 AM	#4
Black 'n' Blue Registered User Join Date: Jun 2011 Location: Calgary, AB, Canada Posts: 146	Re: hmmmm rattle rattle... If you only hear the noise while going a certain speed, there's a 65% chance that its something in the drive line. I would check the wheel bearings, but I'm leaning more towards something inside the rear diff. From my experiences wheels bearing don't rattle they grind more. __________________ -Justin. The past cannot be edited, or erased. Only accepted. Loud, proud and country by the grace of god! Bradley Anderson 1997-2011

08-22-2011, 11:32 AM	#5
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... ok so does it sound kinda like a pinion bearing?

08-22-2011, 04:28 PM	#6
Fixwhataintbroke Enthusiast Join Date: Jun 2010 Location: Graham, Wa. Posts: 192	Re: hmmmm rattle rattle... You can always jack the rear end up so both tires are off the ground, block the front tires, start the truck, put it in gear, have someone give it a little gas, and CAREFULLY look and listen to the back end. __________________ - Cole 1979 Chevy C30 w/ carb 454. 1992 Chevy K1500 w/ tbi 350. Sold 1997 Dodge Ram 1500 w/ Magnum 360 Sold "Good judgment comes from experience. Experience comes from poor judgment." - George Washington

08-22-2011, 05:17 PM	#7
slammedLT1 Registered User Join Date: Jan 2003 Location: Grande Prairie, AB Posts: 77	Re: hmmmm rattle rattle... If that seals bad who knows how much dust and dirt could be visiting the races of that pinion bearing and contaminating your diff fluid. __________________ DIGGER 1984 GMC Sierra 1500 LQ4 T56 12B Chopped 2 1/4, Dropped 6/7, Shaved, Yenko Stripes 2004.5 CCSB GMC 2500HD DMAX LLY, 6" Liftmaster, 6 Fox Resi 2.0 325/50/22" Kumho A/T on KMW's LBZ MP, 5"Ex, Bullydog GT 1996 ECSB GMC Sierra 1500 350/4L60E, FL Headers, 2450 Stall, 6" Pro Comp,3" BL, Shock Hoops, , TrXus STS 38's

08-22-2011, 07:20 PM	#8
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... hmmm ok i think ill try and change the seal and bearing here in the next few days anybody know if its a difficult process or not?

08-22-2011, 10:07 PM	#9
slammedLT1 Registered User Join Date: Jan 2003 Location: Grande Prairie, AB Posts: 77	Re: hmmmm rattle rattle... one thing thats for sure you need to set the proper bearing preload. did a quick search on google and found this http://www.differentials.com/install.html but someone on here can prolly give a more simplistic explanation for ya . I was always told a few crush sleeves come in handy when its goin back together if you dont't get the correct pinion depth. Can't be that crazy tho its just an old chevy rear end! __________________ DIGGER 1984 GMC Sierra 1500 LQ4 T56 12B Chopped 2 1/4, Dropped 6/7, Shaved, Yenko Stripes 2004.5 CCSB GMC 2500HD DMAX LLY, 6" Liftmaster, 6 Fox Resi 2.0 325/50/22" Kumho A/T on KMW's LBZ MP, 5"Ex, Bullydog GT 1996 ECSB GMC Sierra 1500 350/4L60E, FL Headers, 2450 Stall, 6" Pro Comp,3" BL, Shock Hoops, , TrXus STS 38's

08-22-2011, 10:47 PM	#11
383Chevy [><]Sofa King Dirty 4x4[><] Join Date: Jul 2009 Location: Englewood, Fl Posts: 353	Re: hmmmm rattle rattle... Prolly your rear axle mine went out cause the tards who owned the truck before me did tighten all the guts in the axle so it went had to get new gears __________________ 00' Chevy Silverado 1500 z71 33"s 3" lift 5-speed Past trucks 85' Chevy C10 Step side 388 stroker 33" bfg a/t's holley 670cfm world product heads 14.80@92mph 92' S10/Tahoe sbc swap

08-22-2011, 11:06 PM	#12
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... if you dont mind me asking what did the guts run you price wise?

08-22-2011, 11:24 PM	#14
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... im not really sure what im wanting to put in the rear and im new to all this stuff so i dont know to much about rear ends or really anything to be honest with you...and recommendations?

08-22-2011, 11:59 PM	#16
slammedLT1 Registered User Join Date: Jan 2003 Location: Grande Prairie, AB Posts: 77	Re: hmmmm rattle rattle... Im sure if your pinion bearing is shot u should be able to get some play out of it by lifting up and down on the pinion. "Fixwhataintbroke" had a great suggestion to run the truck carefully on some jackstands and listen for any noise. Don't go buy gears with out inspecting whats in there first. Hopefully all goes well bud. __________________ DIGGER 1984 GMC Sierra 1500 LQ4 T56 12B Chopped 2 1/4, Dropped 6/7, Shaved, Yenko Stripes 2004.5 CCSB GMC 2500HD DMAX LLY, 6" Liftmaster, 6 Fox Resi 2.0 325/50/22" Kumho A/T on KMW's LBZ MP, 5"Ex, Bullydog GT 1996 ECSB GMC Sierra 1500 350/4L60E, FL Headers, 2450 Stall, 6" Pro Comp,3" BL, Shock Hoops, , TrXus STS 38's

08-23-2011, 12:39 AM	#17
dropped81 Registered User Join Date: Mar 2011 Location: Rogers, AR Posts: 44	Re: hmmmm rattle rattle... Thanks for all the help guys...



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