9 1/4" diff - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech 9 1/4" diff

Print Thread

9 1/4" diff #1361721 12/30/12 07:29 PM 12/30/12 07:29 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Anyone ever try welding up the spiders on one to make it a "quasi" spool? I'm lucky if I can get 12 passes out of my clutch disc unit before it needs new clutches. Fastest 300

Re: 9 1/4" diff [Re: Crizila] #1361722 12/30/12 07:36 PM 12/30/12 07:36 PM
Joined: Jan 2003 Posts: 20,177 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,177 Park Forest, IL	You do know welded diffs are illegal, don't you John? Time for a Dana. "Everybody funny, now you funny too."

Re: 9 1/4" diff [Re: slantzilla] #1361723 12/30/12 08:31 PM 12/30/12 08:31 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Quote: You do know welded diffs are illegal, don't you John? Time for a Dana. Probably why I haven't gotten any responses . Wish some one made a spool for it. Fastest 300

Re: 9 1/4" diff [Re: Crizila] #1361724 12/30/12 08:38 PM 12/30/12 08:38 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	I killed my stock 9.25, then a Auburn LSD. Been using a Detroit locker for a number of years now, no problem. But I hear you on the spool thing, plus there's the c-clip issue. 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: 9 1/4" diff [Re: Crizila] #1361725 12/30/12 08:39 PM 12/30/12 08:39 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: You do know welded diffs are illegal, don't you John? Time for a Dana. Probably why I haven't gotten any responses . Wish some one made a spool for it. I guess my real question is weather or not I can make it strong enough to last. Off road guys do it all the time. Fastest 300

Re: 9 1/4" diff [Re: Crizila] #1361726 12/30/12 08:46 PM 12/30/12 08:46 PM
Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts MPerry Mopahts memba'
MPerry Mopahts memba' Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts	scary stuff happens when they break and it will.

Re: 9 1/4" diff [Re: MPerry] #1361727 12/30/12 09:46 PM 12/30/12 09:46 PM
Joined: May 2006 Posts: 1,260 New Mexico A Adobedude pro stock
Adobedude pro stock A Joined: May 2006 Posts: 1,260 New Mexico	Quote: scary stuff happens when they break and it will. Agreed, butI have never heard of a 9.25 breaking... 2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.

Re: 9 1/4" diff [Re: Adobedude] #1361728 12/30/12 09:49 PM 12/30/12 09:49 PM
Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts MPerry Mopahts memba'
MPerry Mopahts memba' Joined: Jan 2003 Posts: 11,657 Fitchburg,Massachusetts	Quote: Agreed, butI have never heard of a 9.25 breaking... he is talking about welding spider gears.

Re: 9 1/4" diff [Re: Adobedude] #1361729 12/30/12 11:29 PM 12/30/12 11:29 PM
Joined: Nov 2003 Posts: 1,969 Chandler, AZ Duner top fuel
Duner top fuel Joined: Nov 2003 Posts: 1,969 Chandler, AZ	I broke the carrier with the factory LSD in mine. I went with a Detroit Locker for it.

Re: 9 1/4" diff [Re: MPerry] #1361730 12/30/12 11:34 PM 12/30/12 11:34 PM
Joined: Jan 2003 Posts: 20,177 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,177 Park Forest, IL	John, locked rear also requires aftermarket axles. Tech may not know you have a welded diff, but if they notice you turning you'll get popped for axles. Aren't you fast enough now to require aftermarket axles anyway? "Everybody funny, now you funny too."

Re: 9 1/4" diff [Re: slantzilla] #1361731 12/31/12 12:19 AM 12/31/12 12:19 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	I just scored a 9 1/4 with a 3.55 open diff along with a LOC RITE locker that replaces the spider gears in the open carrier. use stock axles,installs with hand tools,locks and unlocks for turns. also fits 85 up large bolt truck axles when the c-clip/carrier change in the 9 1/4 mostly seen used in 4x4 and off road rigs and a few B-body cars, it is very strong and durable with a positive locking for check into the LOC RITE lockers as they have a few to offer. 9 1/4-8 3/4..ect. cheapest way I have found to get a true locker and not R&R the R&P on a 9 1/4 just swap out the spider gears.

Re: 9 1/4" diff [Re: scratchnfotraction] #1361732 12/31/12 03:58 AM 12/31/12 03:58 AM
Joined: Jan 2005 Posts: 3,699 Newport, Mi Evil Spirit master
Evil Spirit master Joined: Jan 2005 Posts: 3,699 Newport, Mi	I call them Lock Wrongs, because the couple times I had a brain failure and used them I hated driving the car or truck. Any time they were under power it would lock - fine in straight lines, but try pulling out in traffic without squeeling the inside tire - ain't gonna happen. Coasting around corners results in an obnoxious clicking noise as it rachets for the different axle speeds. And both times I ended up breaking the stock carrier (8 1/4's) as soon as I put a tire under it that hooked. Totally different operation than a Detroit Locker - mine in my Spirit has never squeeled a tire I didn't want it to and is bone quiet. Only advantage to a Lock Wrong is not pulling the carrier and swapping the ring gear, which to me isn't an issue - I just check backlash and reset it to that with the new carrier. Free advice and worth every penny... Factory trained Slinky rewinder.........

Re: 9 1/4" diff [Re: Evil Spirit] #1361733 12/31/12 04:16 AM 12/31/12 04:16 AM
Joined: May 2010 Posts: 295 maryland B buck440 enthusiast
buck440 enthusiast B Joined: May 2010 Posts: 295 maryland	ditch the 9 1/4 c clips are for chevy's. my duster had one under it when i bought it narrowed. one time both wheel's spin next time 1 tire fire. i put 8.75 under an all's good.

Re: 9 1/4" diff [Re: slantzilla] #1361734 12/31/12 11:43 AM 12/31/12 11:43 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Quote: John, locked rear also requires aftermarket axles. Tech may not know you have a welded diff, but if they notice you turning you'll get popped for axles. Aren't you fast enough now to require aftermarket axles anyway? Ya big D. section 20, page 14, 2:11 in my 2013 rule book sez it all. Anyway, getting aftermarket axles isn't a problem. Didn't like the detroit locker that was in there. I will look in to the Loc/Rite stuff. It's a good tuff diff that I would like to stick with, but - - - - - . Fastest 300

Re: 9 1/4" diff [Re: Crizila] #1361735 12/31/12 12:34 PM 12/31/12 12:34 PM
Joined: Jan 2005 Posts: 3,699 Newport, Mi Evil Spirit master
Evil Spirit master Joined: Jan 2005 Posts: 3,699 Newport, Mi	Quote: Quote: John, locked rear also requires aftermarket axles. Tech may not know you have a welded diff, but if they notice you turning you'll get popped for axles. Aren't you fast enough now to require aftermarket axles anyway? Ya big D. section 20, page 14, 2:11 in my 2013 rule book sez it all. Anyway, getting aftermarket axles isn't a problem. Didn't like the detroit locker that was in there. I will look in to the Loc/Rite stuff. It's a good tuff diff that I would like to stick with, but - - - - - . Something else to consider - LockRites transmit all the power through the crosspin and into the weakest part of the case. Factory LSD's transmit some of the power through the cones or clutch plate tabs into a stronger part of the case. And don't be surprised if when you install a locking style rear axle that the vehicle develops a hard pull to one side on the launch that you will have to tune out, which is the real reason you are working LSD's so hard. Free advice and worth every penny... Factory trained Slinky rewinder.........

Re: 9 1/4" diff [Re: Evil Spirit] #1361736 12/31/12 02:56 PM 12/31/12 02:56 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: Quote: John, locked rear also requires aftermarket axles. Tech may not know you have a welded diff, but if they notice you turning you'll get popped for axles. Aren't you fast enough now to require aftermarket axles anyway? Ya big D. section 20, page 14, 2:11 in my 2013 rule book sez it all. Anyway, getting aftermarket axles isn't a problem. Didn't like the detroit locker that was in there. I will look in to the Loc/Rite stuff. It's a good tuff diff that I would like to stick with, but - - - - - . Something else to consider - LockRites transmit all the power through the crosspin and into the weakest part of the case. Factory LSD's transmit some of the power through the cones or clutch plate tabs into a stronger part of the case. And don't be surprised if when you install a locking style rear axle that the vehicle develops a hard pull to one side on the launch that you will have to tune out, which is the real reason you are working LSD's so hard. Good info!! Thank you . I'm considering a cone style unit. Don't know how well they will last and I don't think they are rebuildable? Fastest 300

Re: 9 1/4" diff [Re: Crizila] #1361737 12/31/12 04:06 PM 12/31/12 04:06 PM
Joined: Mar 2008 Posts: 883 Affton MO Q qwkmopardan super stock
qwkmopardan super stock Q Joined: Mar 2008 Posts: 883 Affton MO	I put a Dana-60 in my 79 "300". It was allmost a bolt-in. My Dana 60 was from a 71 Charger. 8-3/4 from 71-72 B-bodys will fit the same and 73-74 B-Bodys are exact fit if you want to keep the quiet ride cushions, and are not to difficult to find. Could get ugly if you break an axle in your 9-1/4 diff. 11.600 at 116mph. 408 sm blk mopar--junkyard heads--4050lbs

Re: 9 1/4" diff [Re: qwkmopardan] #1361738 12/31/12 05:14 PM 12/31/12 05:14 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila OP master
Crizila OP master Joined: Oct 2003 Posts: 7,506 Az	Quote: I put a Dana-60 in my 79 "300". It was allmost a bolt-in. My Dana 60 was from a 71 Charger. 8-3/4 from 71-72 B-bodys will fit the same and 73-74 B-Bodys are exact fit if you want to keep the quiet ride cushions, and are not to difficult to find. Could get ugly if you break an axle in your 9-1/4 diff. 11.600 at 116mph. 408 sm blk mopar--junkyard heads--4050lbs Thanks for the info. The 9 1/4 I'm running came with my car. Spring perches are already modified to take single leaf CalTracs. If I have to change out the entire axle assembly I might just go with a custom Ford 9" to save some weight. Fastest 300

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1