» Site Navigation | | » Recent Threads | | | | | | | 07-27-2006, 10:13 PM | #1 | Junior Member Join Date: May 2006 Location: Missouri Posts: 25 | Diff Going BAD Please Help! Ok, My rear differential is going bad and I'm looking at swapping with one fron another BMW. I need some help though determining which one to get. I have a 1996 ti, automatic with lsd and don't want to mess to much with the flanges and shafts. What series of BMW would be the closest match to a "direct bolt on replacement"? If their is no "direct bolt on replacement" what would be the closest thing? TIA | | | 07-28-2006, 01:43 PM | #2 | Senior Member Join Date: Jan 2006 Location: Cincinnati Posts: 890 | Do you know what specifically is going bad? I have a 4.44 ring & pinion if you need it (I actually have the entire diff and case, but its non-LSD). I replaced my 4.44 during my manual conversion, and I still have the diff. Let me know if your interested. __________________ SOLD!!! 1999 332ti //M Sport Titanium Silver M3 S52 3.2 I-6 Engine, M3 Clutch w/ ti Getrag Trans, Z3 3.15 LSD medium case diff and half shafts, OEM Hatch Spoiler, Eurosport HP Underdrive Pulleys, FDM, 17" DS1 rims, M3 Front Struts & Springs, M3 Instrument Cluster, 3-spoke //M steering wheel with tri-color stitching, SSK, CCFL Angels in Depo projectors with 5k HIDs | | | 07-28-2006, 02:40 PM | #3 | Junior Member Join Date: May 2006 Location: Missouri Posts: 25 | Thanks for the offer, but I really want to stay with LSD. I am not sure want part of it is going but it make a pretty loud whining sound and the dealer upon inspection said it was going out. I have talked with the guys at MetrixMotorsport.com and may buy one off them. Has anyone had any experience with differentials from them? | | | 07-28-2006, 08:03 PM | #4 | Senior Member Join Date: Jun 2003 Location: Halethorpe, MD Posts: 1,028 | You can also try www.koalamotorsport.com. From what I've heard they're well-respected in the BMW differential world. If you can live without the car for a while it may be easiest to send it away to get rebuilt. Or buy a rebuilt one from them. Good luck. | | | 07-29-2006, 07:38 AM | #5 | Senior Member Join Date: May 2005 Location: England, UK Posts: 1,288 | LSD will cost you a few $$$ extra Just get a Kaaz Unit. __________________ 1995 BMW 316i Cosmos Black Mods: • Magnex Cat-Back Exhaust • Smoked Corner Lights + Repeators • M3 17" Wheels • De-Baffled Air Box • AC HandBrake Handle and Gear Knob • DEPO Euro Epsiloids + Predator Chronium Rings • Chrome Interior bits •IE Poly-Urethane RSFMs • Kenwood Power Series Audio • Powder Coated e36 325 Front Callipers • Sports Seats | | | 08-17-2006, 01:37 AM | #6 | Junior Member Join Date: May 2006 Location: Missouri Posts: 25 | OK, a good 318ti is impossible to find but e30 with LSD can be found fairly easy. 50K dollar question is what ratio should I get for and automatic? AND Do I have to use the E30 CV joints or will the E30 bolt up to the 318ti? | | | 08-17-2006, 02:57 AM | #7 | Senior Member Join Date: Oct 2005 Location: Puerto Rico Posts: 885 | you can use a e30 or e28 diff with out problems, use the ti flanges on the new diff and install it back, for diff ratio look in www.realoem.com __________________ BMW...MY NEW TOY Mods: Some plastic parts, ///M Wheels and me | | | 08-17-2006, 03:11 AM | #8 | Junior Member Join Date: May 2006 Location: Missouri Posts: 25 | Thanks, father. Are the flanges pretty easy to remove and replace with the ti's? | | | 08-17-2006, 03:25 AM | #9 | Senior Member Join Date: Oct 2005 Location: Puerto Rico Posts: 885 | well i not work in my tranny and diff swap, i pay a mechanic to do that but i look for the correct info and parts numbers to him, the flanges are easy to swap, but if you use a e28 diff you need a e30 cover, also the spare tire give a little trouble because the stock diff is small case and the e28 and e30 are large. http://www.318ti.org/notebook/diff_c...ion/index.html there is all the info but no use the hybrid axles, use the TI stock http://318ti.org/forum/showthread.php?t=11529 __________________ BMW...MY NEW TOY Mods: Some plastic parts, ///M Wheels and me | | | 08-17-2006, 04:16 PM | #10 | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 | So my local axle shop will rebuild the average 3rd member for about 150 bucks. 3 bearings, If its an LSD some new clutch plates. Its not that bad of a job. I've done it myself, it takes time and a little carefull reading to make sure you have the lash set correctly 95+ percent of the time you reuse the shims for the pinion and carrier and your fine. Dave __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | 08-17-2006, 06:40 PM | #11 | Senior Member Join Date: Nov 2004 Location: Minneapolis Posts: 1,587 | Are you willing to just buy a "new" used one? If so, check out http://www.foreignautosalvage.com/ It's a salvage yard in Kentucky and they have a used 4.44 LSD from a 98 318ti automatic. $250. | | | 08-17-2006, 08:50 PM | #12 | Senior Member Join Date: Jan 2006 Location: Cincinnati Posts: 890 | Quote: Originally Posted by bmwkru Thanks for the offer, but I really want to stay with LSD. | I wasn't suggesting that you do. I don't think anyone here would recommend that. I was offering up a 4.44 ring and pinion, which are interchangeable between LSD and non-LSD rear-ends. That's why I asked you if you knew what was specifically wearing out. No sense replacing all of the guts, if only half of them are worn out. __________________ SOLD!!! 1999 332ti //M Sport Titanium Silver M3 S52 3.2 I-6 Engine, M3 Clutch w/ ti Getrag Trans, Z3 3.15 LSD medium case diff and half shafts, OEM Hatch Spoiler, Eurosport HP Underdrive Pulleys, FDM, 17" DS1 rims, M3 Front Struts & Springs, M3 Instrument Cluster, 3-spoke //M steering wheel with tri-color stitching, SSK, CCFL Angels in Depo projectors with 5k HIDs | | | 08-24-2006, 01:45 AM | #13 | Junior Member Join Date: May 2006 Location: Missouri Posts: 25 | Quote: Originally Posted by CirrusSR22 Are you willing to just buy a "new" used one? If so, check out http://www.foreignautosalvage.com/ It's a salvage yard in Kentucky and they have a used 4.44 LSD from a 98 318ti automatic. $250. | I ordered this from them but I'm not convinced it is and LSD. Correct me if I am wrong but shouldn't an LSD's flanges spin in the same direction when turned? Does it not mean that if they spin opposite directions that it is an open differential? | | | 08-24-2006, 04:13 AM | #14 | Senior Member Join Date: Oct 2005 Location: Puerto Rico Posts: 885 | if dpin to the same direction is a lsd if not is an open dif __________________ BMW...MY NEW TOY Mods: Some plastic parts, ///M Wheels and me | | | 08-24-2006, 02:21 PM | #15 | Senior Member Join Date: Jan 2006 Location: Cincinnati Posts: 890 | Quote: Originally Posted by bmwkru Does it not mean that if they spin opposite directions that it is an open differential? | That isn't a good test. While many on the board will tell you that it is, its just not true. An LSD diff will spin in different directions if the driveshaft is prevented from spinning. (Put the trans in gear, spin one side, other side will spin in the opposite direction.) It's a 'better' test in neutral. With the diff out of the car, spinning the pinion (input) shaft by hand will turn both output flanges forward on an open and LSD diff. While your spinning the pinion, grab one of the output shafts with your other hand. If all the input power is transfered to the other output flange, you've got an open diff. If the flange you grabbed is fighting you as you continue to turn the pinion, its LSD. Make sense? __________________ SOLD!!! 1999 332ti //M Sport Titanium Silver M3 S52 3.2 I-6 Engine, M3 Clutch w/ ti Getrag Trans, Z3 3.15 LSD medium case diff and half shafts, OEM Hatch Spoiler, Eurosport HP Underdrive Pulleys, FDM, 17" DS1 rims, M3 Front Struts & Springs, M3 Instrument Cluster, 3-spoke //M steering wheel with tri-color stitching, SSK, CCFL Angels in Depo projectors with 5k HIDs | | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |