Re: 8-3/4 rear running very hot and whining at 35mph
[Re: hemi67]
#1408334
03/24/13 11:43 PM
03/24/13 11:43 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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The fact that it is happening under coast and accell makes me think something is way wrong on the contact. Something will give with that amt of heat even if it's just the noise getting worse & it sounds bad as it is. My rear end guy tells me Richmond gears are hard to set up (compared to other brands). I would wait for Doc or someone as knowledgeable to chime in
live every 24 hour block of time like it's your last day on earth
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: hemi67]
#1408335
03/25/13 02:09 AM
03/25/13 02:09 AM
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Joined: Mar 2008
Posts: 335 indiana
marks69
enthusiast
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enthusiast
Joined: Mar 2008
Posts: 335
indiana
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How was the final contact pattern? Pinion bearing preload can be checked with a beam type torque wrench. Richmond says 15 to 20 miles under normal operating temperatures without creating a shock or towing. Allow to cool completely and repeat 2 to 3 times. I know break creates a lot of heat but 2 hours later and can't keep your hand on the differential? http://www.richmondgear.com/07pdfs/BodyEXCEL.pdfPage 5
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: JohnRR]
#1408337
03/25/13 09:03 AM
03/25/13 09:03 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Heat is normal. I had a bearing making noise once and in my troubleshooting, I started touching other known good rears, and even after a 25-30 minute drive, they were HOT. after an hour drive, I could toss water on one and it would flash into steam. But I didn't check to see how long they would take to cool down.
I'd try to get a temp reading as soon as you park.
**Photobucket sucks**
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: 70Cuda383]
#1408338
03/25/13 12:50 PM
03/25/13 12:50 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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Heat at least initially during the break in is normal. If it's too hot to put you hand on and you havent been drag racing or road racing it's getting too hot. Noise is an indicator of poor contact. You set the stuff to spec - but did you run a pattern? the trick is a good pattern within spec. not just "within spec". Also - new gears require a break in period. You jack the car up, run it in drive between 30-50mph for 15 minutes. Then let it cool completely (over night). Then drive it a short distance, no hard accel or decel, drive for about 15 minutes, then let cool (overnight is best). After that it's good to go. After the initial break in on the jacks, it should not get that hot and if it's noisey at all during either, something's wrong.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: hemi67]
#1408341
03/26/13 02:38 AM
03/26/13 02:38 AM
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Joined: Aug 2003
Posts: 43,718 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,718
Bend,OR USA
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Which case are you using and did you get the recommended pinion bearing preload set up correctly on it?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: Cab_Burge]
#1408342
03/26/13 01:37 PM
03/26/13 01:37 PM
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Joined: Oct 2006
Posts: 343 Pennsylvania
hemi67
OP
enthusiast
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OP
enthusiast
Joined: Oct 2006
Posts: 343
Pennsylvania
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It is the "489" Case with the 1-7/8 pinion. The pinion bearing preload was correct. I have decided to remove the Richmond gears and go with a different brand including replacing the pinion bearings. I don`t want to go through this again. I don`t think since there is already a wear pattern that this noise will go away with a change in pinion depth and I don`t want to waste the time and money to find out Im going to have to replace the gears anyway to have a quiet Diff. I have not made a decision on which brand as of yet. I have heard noise complaints on U.S. Gear as well, which now are made in China. Possibly going to go with Motive gear, but now sure yet. I am trying to find a set of factory gears but have not as of yet. Thanks for your assistance.
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: JohnRR]
#1408344
03/26/13 07:29 PM
03/26/13 07:29 PM
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Joined: Jun 2003
Posts: 4,872 connecticut
pnypwr
master
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master
Joined: Jun 2003
Posts: 4,872
connecticut
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richmonds are noisy...every set I have ever set up is...nature of the beast unfortunately. as for the heat, the improper break in doomed that rear end, without the proper heat cycle it will wear quickly. you say your specs are good, what was the preload on the pinion bearings? did you check it with a rotational torque wrench? im assuming the carrier was out when you did so? what did your contact pattern look like? just because its in "spec" doesnt mean its right. they get the pinion depth and thats a place to start. Sometimes it looks good other times not so much. if your taking it apart again get new pinion bearings. id stay away from usa gear or value gear...ive had a lot of good luck with yukon gear. post some pics of what you got.
"Are you gonna bark all day lil doggy? Or are you gonna bite?"
05 ram 2500 ctd 74 gremlin x 360 65 mustang 347 70 coronet R/T 440 03 Mach 1
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: hemi67]
#1408347
03/26/13 09:26 PM
03/26/13 09:26 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Anywhere to get a decent price on Yukon Gears in the southeast?? Randys ring and pinion seems high at 412.00 for a set of 3.55`s for a 489 case.
Mosher shows them on their site for $255. bucks. Motive Gear...web page
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: IcorkSOAK]
#1408350
03/26/13 09:31 PM
03/26/13 09:31 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
It is always the BESTest to stay with the OEM gear sets.
Does Mopar still sell OEM gears for a 8 3/4? Does anyone sell OEM gears?
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: Challenger 1]
#1408351
03/26/13 09:40 PM
03/26/13 09:40 PM
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Joined: Jul 2008
Posts: 30,632 Florida STAYcation
IcorkSOAK
Financed his waterbed
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Financed his waterbed
Joined: Jul 2008
Posts: 30,632
Florida STAYcation
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Quote:
Quote:
It is always the BESTest to stay with the OEM gear sets.
Does Mopar still sell OEM gears for a 8 3/4? Does anyone sell OEM gears?
I think they do ... but I would n ot bet my life on it.
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Re: 8-3/4 rear running very hot and whining at 35mph
[Re: IcorkSOAK]
#1408352
03/26/13 11:30 PM
03/26/13 11:30 PM
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Joined: Jun 2003
Posts: 4,872 connecticut
pnypwr
master
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master
Joined: Jun 2003
Posts: 4,872
connecticut
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ive never had a problem with yukons, and ill bet ive set up more than a couple hundred rears. they can be pricey, but you also get what you pay for! cheap gears make noise thats why theyre cheap
"Are you gonna bark all day lil doggy? Or are you gonna bite?"
05 ram 2500 ctd 74 gremlin x 360 65 mustang 347 70 coronet R/T 440 03 Mach 1
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