rear end whine

94stangGT50 · April 15th, 2008, 11:24 PM

just replaced the stock ring gear and pinion from a 3.08 to a 3.73, never done it before but did have some instructions to follor but when i take it for a ride it whines pretty loud around 40mph was wondering what spec i might be off on?

usmcsawgunner · April 16th, 2008, 11:03 AM

backlash

HMUSN · April 16th, 2008, 11:05 AM

+1

91cobra5.0 · April 16th, 2008, 11:15 AM

+1

I did mine and it took me a few tries to get it right, mostly becuase I didn't have a dial indicator until this last try,

Did you leave the stock shim on the pinion?

Check all of your loads, make sure you crush the sleeve, get the right load on the pinion and when you shim the carrier just make sure its a tight fit to get that carrier in there, that way it loads the carrier bearings.

I know I just wrote a novel but if you got ne more questions about this just pm me, I got real good at it doin mine

94stangGT50 · April 16th, 2008, 11:20 AM

also i should have mentioned that the gears were used out of a 98 explorer from a local auto parts store, thought ide save a little cash, but i did end up using same shims on pinion and carrier, checked backlash and it was .010-.011 i re used old bearing but got a new crush and SOB those things are hard to tighten up, how important is the drag on the pinion i know its suppose to be 16-26 or somethin in/lbs but i just kinda felt it by hand

91cobra5.0 · April 16th, 2008, 11:42 AM

Your talking about preload on the pinion? The number sounds high and yea what I did was just tourqe mine down and as I tightened it I would spin the carrier in the housing to make sure it didn't get to tight,
. You want it to spin but stop kinda firmly after like a good rotation and a half or so

stang fanatic · April 16th, 2008, 07:59 PM

setting up used gears in a different housing typically causes the gear set to run a different wear pattern, and inevitably always make noise

usmcsawgunner · April 17th, 2008, 01:22 AM

+1

April 15th, 2008, 11:24 PM	#1
94stangGT50 Newbie Join Date: Apr 2008 Posts: 8 iTrader: 0 reviews	rear end whine just replaced the stock ring gear and pinion from a 3.08 to a 3.73, never done it before but did have some instructions to follor but when i take it for a ride it whines pretty loud around 40mph was wondering what spec i might be off on?

April 16th, 2008, 11:05 AM	#3
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	+1 __________________

April 16th, 2008, 07:59 PM	#7
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	setting up used gears in a different housing typically causes the gear set to run a different wear pattern, and inevitably always make noise __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

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rear end whine	This thread	Refback	October 29th, 2008 02:12 PM

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April 16th, 2008, 11:03 AM	#2
usmcsawgunner Regular 1993 Mustang GT 13.2 @98.54 Join Date: Apr 2007 Location: Kaneohe Bay, Hawaii Posts: 433 iTrader: 0 reviews	backlash

April 16th, 2008, 11:15 AM	#4
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	+1 I did mine and it took me a few tries to get it right, mostly becuase I didn't have a dial indicator until this last try, Did you leave the stock shim on the pinion? Check all of your loads, make sure you crush the sleeve, get the right load on the pinion and when you shim the carrier just make sure its a tight fit to get that carrier in there, that way it loads the carrier bearings. I know I just wrote a novel but if you got ne more questions about this just pm me, I got real good at it doin mine

April 16th, 2008, 11:20 AM	#5
94stangGT50 Newbie Join Date: Apr 2008 Posts: 8 iTrader: 0 reviews	also i should have mentioned that the gears were used out of a 98 explorer from a local auto parts store, thought ide save a little cash, but i did end up using same shims on pinion and carrier, checked backlash and it was .010-.011 i re used old bearing but got a new crush and SOB those things are hard to tighten up, how important is the drag on the pinion i know its suppose to be 16-26 or somethin in/lbs but i just kinda felt it by hand

April 16th, 2008, 11:42 AM	#6
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	Your talking about preload on the pinion? The number sounds high and yea what I did was just tourqe mine down and as I tightened it I would spin the carrier in the housing to make sure it didn't get to tight, . You want it to spin but stop kinda firmly after like a good rotation and a half or so

April 17th, 2008, 01:22 AM	#8
usmcsawgunner Regular 1993 Mustang GT 13.2 @98.54 Join Date: Apr 2007 Location: Kaneohe Bay, Hawaii Posts: 433 iTrader: 0 reviews	+1

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