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Re: Swapped the gears in a 9.25 - now it howls [Re: JF_Moparts] #642216 03/22/10 02:58 PM 03/22/10 02:58 PM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 OP master
Commando1 OP master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	Quote: I'm going to be rebuilding an 8 3/4 3rd member shortly. Is there anything I should look out for to ensure this is done right? He said it best: Quote: I learned from you mistake already. I will just have it done too.

Re: Swapped the gears in a 9.25 - now it howls [Re: JF_Moparts] #642217 03/22/10 03:04 PM 03/22/10 03:04 PM
Joined: Jan 2010 Posts: 16 Hanceville,AL 7 71 R/T member
71 R/T member 7 Joined: Jan 2010 Posts: 16 Hanceville,AL	The way I set up gears is the poor mans way but it works.Too check your pinion depth paint 4 or 5 teeth on the ring gear with some spray paint then rotate the gears a few times the wear pattern shoud be centered on the ring gear teeth.The way I check my back lash is to barly shake the ring gear back and forth and lisen for a slight tick(make sure there is no oil on the teeth as it will dampen the sound).The proper backlash should be around 6 thousandth's.Maybe this will help.I have built many rearend's so I can set the backlash by ear by just lisening.

Re: Swapped the gears in a 9.25 - now it howls [Re: Commando1] #642218 03/22/10 03:21 PM 03/22/10 03:21 PM
Joined: Jul 2008 Posts: 30,474 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,474 Florida STAYcation	Quote: or do I have options? MAY I suggest an OPTION ....and a "cure" ? .... get some fine SAWDUST and mix-it-in with the rear-end dope !

Re: Swapped the gears in a 9.25 - now it howls [Re: JF_Moparts] #642219 03/22/10 03:32 PM 03/22/10 03:32 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	set the 489 up with solid spacer and shims loose the crush sleeve this will let you swap yokes and replace the pinion seal with out replaceing the crush sleeve in the future if its a cone sg,make sure its in good shape,there is a member that has washers so the cones can be milled some and give a used/worn cone sg more life if its on the down side and worn the cone sg adds metal shavings to the oil as it wears also...so add a drain plug for quik flush and refills ez to do and it can go horzontal in the back edge of the housing just below the ball part of the rear cover..it will be out of the way there also all this makes a nice 489 to play with IMHO,have it done....good luck!

Re: Swapped the gears in a 9.25 - now it howls [Re: scratchnfotraction] #642220 03/23/10 04:58 PM 03/23/10 04:58 PM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 OP master
Commando1 OP master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	Quote: Quote: So, we're talking starting from scatch and all new parts? I hate to be the bearer of bad news OK. I brought mine in to the rear end guru. All he had to do was reshim the pinion and I was good to go. Quiet as can be. FWIW, he said except for the pinion shim, it was a great job. My confidence is now partially salvaged. YAH! I was lucky.

Re: Swapped the gears in a 9.25 - now it howls [Re: Commando1] #642221 03/23/10 05:21 PM 03/23/10 05:21 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	now you need another core to play with I have a 73-489-3.23 you can do for me if you want needs gears and bearings and set up with a solid spacer plez

Re: Swapped the gears in a 9.25 - now it howls [Re: Commando1] #642222 03/23/10 05:52 PM 03/23/10 05:52 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Quote: Quote: So, we're talking starting from scatch and all new parts? I hate to be the bearer of bad news OK. I brought mine in to the rear end guru. All he had to do was reshim the pinion and I was good to go. Quiet as can be. FWIW, he said except for the pinion shim, it was a great job. My confidence is now partially salvaged. YAH! I was lucky. It ain't rocket science. I hear you 71R/T, after you do a few you know what it needs to feel like. I still check it with a dial indicator but I can get it real close before I even mount the indicator just by feel. Glad you didn't have to buy any new parts.

Re: Swapped the gears in a 9.25 - now it howls [Re: 70Cuda383] #642223 03/23/10 05:59 PM 03/23/10 05:59 PM
Joined: Mar 2010 Posts: 151 MotorCity RC91 member
RC91 member Joined: Mar 2010 Posts: 151 MotorCity	Quote: those 9.25s are a pain in the butt with their adjuster nuts inside the tubes that you need the long hex head tool to turn. A little tip. C body torsion bars have the correct hex end for adjusting backlash on a 9-1/4, and they are long enough too.

Re: Swapped the gears in a 9.25 - now it howls [Re: RC91] #642224 03/23/10 06:22 PM 03/23/10 06:22 PM
Joined: Jul 2008 Posts: 30,474 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,474 Florida STAYcation	Hay Ollie ... did you use a SPREADER during the install?

Re: Swapped the gears in a 9.25 - now it howls [Re: dOc !] #642225 03/23/10 06:48 PM 03/23/10 06:48 PM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 OP master
Commando1 OP master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	Quote: Hay Ollie ... did you use a SPREADER during the install? Whataza spreader? Last edited by Commando1; 03/23/10 06:52 PM.

Re: Swapped the gears in a 9.25 - now it howls [Re: Commando1] #642226 03/23/10 06:56 PM 03/23/10 06:56 PM
Joined: Jul 2008 Posts: 30,474 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,474 Florida STAYcation	First I will say that i have never worked on a 9 1/4 ... or a 9 3/4 for that matter ... The FSM says that you have to spread the case 015-020 during the R&P install.

Re: Swapped the gears in a 9.25 - now it howls [Re: Commando1] #642227 03/23/10 08:02 PM 03/23/10 08:02 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Quote: Quote: So, we're talking starting from scatch and all new parts? I hate to be the bearer of bad news OK. I brought mine in to the rear end guru. All he had to do was reshim the pinion and I was good to go. Quiet as can be. FWIW, he said except for the pinion shim, it was a great job. My confidence is now partially salvaged. YAH! I was lucky. I'm glad that worked REAL good for you especially since my advice was that it was trashed and it was time to start over . That would have been quite a waste of $$$. live every 24 hour block of time like it's your last day on earth

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