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9.25 diff/carrier question. #1546844 12/12/13 02:56 PM 12/12/13 02:56 PM
Joined: Oct 2008 Posts: 151 Albion NY H Haibach Boys OP member
Haibach Boys OP member H Joined: Oct 2008 Posts: 151 Albion NY	I'm having an auburn limited slip and motive gears put in my 91 dodge with an 9.25 rear.. the guy set the pattern and its really nice damn near perfect...but the carrier (auburn unit) is rubbing the pinion...anyone have these problem with any of the componets. i did call auburn and they did suggest to verfy the part num on the housing, to make sure it wasnt boxed wrong.. other then that im at a lose for suggestions.

Re: 9.25 diff/carrier question. [Re: Haibach Boys] #1546845 12/12/13 04:40 PM 12/12/13 04:40 PM
Joined: May 2003 Posts: 1,751 Graham, WA P Polarapete top fuel
Polarapete top fuel P Joined: May 2003 Posts: 1,751 Graham, WA	I have never had one of these apart before, but I am sure that the carrier or the pinion gear can be "clearanced" (perhaps both) in order to be compatible. If the parts were completely wrong there is no way that they could be assembled so that a pattern could be established. This will require a little tweaking, don't give up you are almost there. There maybe a little casting flash that needs to be removed from the carrier for clearance. I would be interested in how you finally resolve this 1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer

Re: 9.25 diff/carrier question. [Re: Haibach Boys] #1546846 12/12/13 04:40 PM 12/12/13 04:40 PM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	Throw the Auburn POS in the garbage and get a Detroit Tru Trc.. Its a much better unit and you will be a lot happier with it.. I am truckless..

Re: 9.25 diff/carrier question. [Re: Haibach Boys] #1546847 12/12/13 10:58 PM 12/12/13 10:58 PM
Joined: Nov 2008 Posts: 5,966 Greenville, PA redraptor master
redraptor master Joined: Nov 2008 Posts: 5,966 Greenville, PA	Quote: I'm having an auburn limited slip and motive gears put in my 91 dodge with an 9.25 rear.. the guy set the pattern and its really nice damn near perfect...but the carrier (auburn unit) is rubbing the pinion...anyone have these problem with any of the componets. i did call auburn and they did suggest to verfy the part num on the housing, to make sure it wasnt boxed wrong.. other then that im at a lose for suggestions. How high is the gear ratio for that to even happen? Secondly, this guy doesn't have a clue after setting up something so perfectly?

Re: 9.25 diff/carrier question. [Re: Haibach Boys] #1546848 12/13/13 06:04 AM 12/13/13 06:04 AM
Joined: Oct 2010 Posts: 295 Greensburg, Pa M Mpetros enthusiast
Mpetros enthusiast M Joined: Oct 2010 Posts: 295 Greensburg, Pa	Motive wouldn't of been My choice in a 9 1/4.. They usually are noisy in a 9 1/4.. I never had to do any grinding when installing a Auburn in a 9 1/4.. Pics would be helpful.. Or if You like call My Shop and we can go over it with out typing back and forth.. Just ask for Mark or Pat 724-837-8233 www.Greensburgmachine.com

Re: 9.25 diff/carrier question. [Re: Mpetros] #1546849 12/13/13 12:12 PM 12/13/13 12:12 PM
Joined: Oct 2008 Posts: 151 Albion NY H Haibach Boys OP member
Haibach Boys OP member H Joined: Oct 2008 Posts: 151 Albion NY	The gears are just 3.55s, its just my daily driver. i havent had a chance to get to his shop yet but once i do ill snap some pics and keep ya posted.

Re: 9.25 diff/carrier question. [Re: Polarapete] #1546850 12/13/13 06:23 PM 12/13/13 06:23 PM
Joined: May 2003 Posts: 1,751 Graham, WA P Polarapete top fuel
Polarapete top fuel P Joined: May 2003 Posts: 1,751 Graham, WA	It occurs to me that perhaps the reason for the interference is that the mechanic has set the pinion depth way too low and has achieved a "good pattern" by moving the ring gear adjusters out to their limits on one side and way retracted on the other. That would bring the carrier into the pinion 1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer

Re: 9.25 diff/carrier question. [Re: Polarapete] #1546851 12/14/13 01:39 AM 12/14/13 01:39 AM
Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN...	Quote: It occurs to me that perhaps the reason for the interference is that the mechanic has set the pinion depth way too low and has achieved a "good pattern" by moving the ring gear adjusters out to their limits on one side and way retracted on the other. That would bring the carrier into the pinion Not true. Pinion depth is dictated by the center line of the ring gear. If the pattern is correct the depth is set for that ring gear. If the right carrier is being used for the group ratio it is in it will not hit. If the wrong carrier is being used the correct pattern can be achieved but the clearances can be to close to the carrier.

Re: 9.25 diff/carrier question. [Re: NITROUSN] #1546852 12/14/13 03:42 PM 12/14/13 03:42 PM
Joined: May 2003 Posts: 1,751 Graham, WA P Polarapete top fuel
Polarapete top fuel P Joined: May 2003 Posts: 1,751 Graham, WA	I think we are assuming the installer knows what he is doing and if that were the case there probably would be no issue to talk about As an amateur, I once spent several hours trying to get a Dana 60 setup right. I had a good pattern but the backlash was wrong, until I got the pinion depth right. Even with setup bearings it is a pain to assemble, check, disassemble, measure shims, reassemble, recheck Unless you stand over the guy and watch him put it together, we are only guessing here. 1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer

Re: 9.25 diff/carrier question. [Re: Polarapete] #1546853 12/14/13 06:17 PM 12/14/13 06:17 PM
Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN...	Quote: I had a good pattern but the backlash was wrong, until I got the pinion depth right. This is also wrong. You don't adjust the pinion depth for backlash. If you have the correct pattern or close to you adjust the carrier to correct the backlash not the pinion. Pinion is set to the correct depth and bearing pre-load. At this step the pinion does not get changed. Then backlash is set with correct side bearing pre-load. Pattern verified and should be correct. The pinion adjustment will only give the correct pattern at one depth. 2-

Re: 9.25 diff/carrier question. [Re: Haibach Boys] #1546854 12/14/13 06:25 PM 12/14/13 06:25 PM
Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN...	Quote: but the carrier (auburn unit) is rubbing the pinion...anyone have these problem with any of the componets. This can happen if the carrier is incorrect. As I recall the rwal trucks have a different carrier due to the rwal counting ring. Either way you could have a mismatch of parts causing the interference problem. The mopar style threaded adjusters offer a fast easy way to set the carrier up. If you were using shims you would most likely see one side with a big stack and none on the other immediately cluing you that something is not right.

Re: 9.25 diff/carrier question. [Re: NITROUSN] #1546855 12/15/13 10:35 AM 12/15/13 10:35 AM
Joined: Nov 2008 Posts: 5,966 Greenville, PA redraptor master
redraptor master Joined: Nov 2008 Posts: 5,966 Greenville, PA	Quote: This can happen if the carrier is incorrect. As I recall the rwal trucks have a different carrier due to the rwal counting ring. I'll have to keep that in mind. I've set up several and never encountered this. I have only seen it in certain older GM 10 bolts.

Re: 9.25 diff/carrier question. [Re: redraptor] #1546856 12/15/13 06:05 PM 12/15/13 06:05 PM
Joined: Jun 2003 Posts: 3,325 Truckville, the capital of NY 85_Ram_4speed master
85_Ram_4speed master Joined: Jun 2003 Posts: 3,325 Truckville, the capital of NY	Quote: Quote: This can happen if the carrier is incorrect. As I recall the rwal trucks have a different carrier due to the rwal counting ring. I'll have to keep that in mind. I've set up several and never encountered this. I have only seen it in certain older GM 10 bolts. The RWAL trucks do have a different carrier because of the tone ring for the speed sensor. But if I remember right, the ring gear mounting flange is still in the same spot, and the carrier has a receiver groove for the tone ring right behind the ring gear. The ring gear bolts do not pass through the tone ring sandwiching it and spacing the ring gear out as I think that is what you might be thinking of. I think, LOL. CRS is setting in. Outcast Dodge guy.

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