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Old 10-21-2013, 07:07 PM   #1
pvansickler
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Default 318ti Stock L/S Diff?

Does anyone know where aor can recommend a way to get my hands on a stock 3.45 or 3.73 L/S differential for my stock 1998 318ti?
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Old 10-21-2013, 08:03 PM   #2
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you'll either need to find one from an E30 along with its halfshafts or one from a 95 ti
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Old 10-22-2013, 12:36 AM   #3
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if you do not get a direct response on this or other bmw forums, call dan at www.diffsonline.com he is a recognized expert on bmw differentials and can give you some information about availability. he does sell a ls clutch kit for the small case differential, but you would have to check with him on the desired ratios. good luck
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Old 10-22-2013, 02:39 AM   #4
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car-part.com. Search 1995 318i "carrier". That should bring up a list of all ratios for 95 318 models, pick "Htbk (ti), MT (3.45 ratio), locking". If you see a possibility call/email the yard and request pictures of the housing and tag on the cover. Look for an 'S' stamped on the housing or S3.45 on the tag.
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Old 10-24-2013, 01:31 AM   #5
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Don't the Z3 1.9 168mm diffs. fit our cars as well?
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Old 10-24-2013, 04:01 AM   #6
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Quote:
Originally Posted by zoner View Post
Don't the Z3 1.9 168mm diffs. fit our cars as well?
Yup perfect fit,

What you can look into also is the later model 6cyl auto z3 diffs. You would also have to use e30 halfshafts since its a medium case, but they are 3.46 Torsion LSD - not clutch type so it won't wear out. Now if your into autox,track,drift and for some reason you prefer clutch type over torsion type LSD that will be up to you. But they are easier to find then small case 3.46 LSD diffs and should work well, I have one at home I hope to put on in the next month.
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Old 10-24-2013, 02:22 PM   #7
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Thanks for the input. I guess I should lean towards putting in a medium size Diff since eventually I want to put a turbo on the engine and pump up the HP. We are using the ti for autox and eventually for track for driving school so I think the clutch Diff is the way to go but will research the differences and pros/cons of each. What are the groups thoughts?
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Old 10-29-2013, 04:49 AM   #8
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Quote:
Originally Posted by pvansickler View Post
Thanks for the input. I guess I should lean towards putting in a medium size Diff since eventually I want to put a turbo on the engine and pump up the HP. We are using the ti for autox and eventually for track for driving school so I think the clutch Diff is the way to go but will research the differences and pros/cons of each. What are the groups thoughts?
I was with a clutch type now going to torsion, so I should be able to tell you what I think once I decide to take it for a good drive - I am using torsion now mainly because the car is daily driven and I don't have to worry about wearing of clutch packs. They act different from each other and best would be to drive both and see what suits your needs. Also going medium size diff will give you much more options. Check out: http://www.bimmerdiffs.com/ for good prices and parts for rebuilding clutchpacks and going from the stock 25% lock to 40% - I think he is also on the forums here.

Good luck.
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Old 10-31-2013, 08:54 PM   #9
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Quote:
Originally Posted by anassa View Post
I was with a clutch type now going to torsion, so I should be able to tell you what I think once I decide to take it for a good drive - I am using torsion now mainly because the car is daily driven and I don't have to worry about wearing of clutch packs. They act different from each other and best would be to drive both and see what suits your needs. Also going medium size diff will give you much more options. Check out: http://www.bimmerdiffs.com/ for good prices and parts for rebuilding clutchpacks and going from the stock 25% lock to 40% - I think he is also on the forums here.

Good luck.
Good information on the source of rebuild parts for 25% LSD. Thanks.
I have been wanting to ask for vendors for LSD rebuild parts so I can rebuild mine.
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Old 10-31-2013, 09:46 PM   #10
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What about putting in a E36 M3 Diff? I am guessing that is L/S and is beefier than the stock ti diff and will hold up better when I pump up the motor.

Also, how difficult is it changing out the diffs for a shade tree mechanic?
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Old 11-01-2013, 01:21 AM   #11
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e36 diffs don't fit.

Pretty definitive info on dif swaps for our cars. Thanks to cooljess76
http://www.318ti.org/forum/showpost....8&postcount=11

I'm shopping for an e30 l/s diff now
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Old 11-01-2013, 03:27 PM   #12
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Thats for guiding in the right direction. The info is what I was looking for. Thanks for the link... Now comes the fun part... the SEARCH...
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Old 11-26-2013, 07:37 PM   #13
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Can I buy just this?

http://www.ebay.com/itm/BMW-E30-E36-...a5c81d&vxp=mtr
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Old 11-26-2013, 07:50 PM   #14
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Quote:
Originally Posted by diegokiill View Post
If you have to ask then no, find a e30 diff or z3 diff to throw in - just because cracking a diff open to swap internals is a lot of work when you can get something that will work without doing all that.
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Old 11-26-2013, 07:51 PM   #15
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Quote:
Originally Posted by anassa View Post
If you have to ask then no, find a e30 diff or z3 diff to throw in - just because cracking a diff open to swap internals is a lot of work when you can get something that will work without doing all that.
+1000
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