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Old 12-03-2007, 04:30 PM   #1
L84THSKY
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Default Speed Sensor

Like I've said previously, I had new seals put in my diff. The driveshaft seal, halfshaft seals and rear cover seals have been replaced. I took it back to the shop to trace a small leak two weeks ago. He replaced an o-ring that goes around the speed sensor, and thought he fixed it. It's still leaking, so I went back, and now he says the speed sensor is where the leak is coming from.

Not a big deal, I can replace that easily.

The questions is, can the speed sensor really be where the leak is, or is the o-ring still the issue? Second, should I buy the speed sensor made for the 3.46 LSD, or buy a new one that fit my stock diff?

The part #'s are different, and from the picture, something else is different on the socket where the wires come in.

Here are the links.

http://www.realoem.com/bmw/showparts...09&hg=33&fg=10
http://www.realoem.com/bmw/showparts...31&hg=33&fg=10

In the first link, part #11 is not familiar, doesn't show in the stock TI part list.
I am currently using my stock TI speed sensor in the E28 diff, and it works fine. So which speed sensor should I replace it with, or should I just try something else to fix the small leak?
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-03-2007, 04:43 PM   #2
thesk8nmidget
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Default

i used my speed sensor off my ti diff and used the bracket off my e30 diff to make it fit staright and tight. i havent had a problem with a leak yet.

my plug wouldnt work with the e30 speed sensor.
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Sold-1995 318ti, Club Sport, Hellrot
Sold-1996 318ti, Active Model, Boston Green
Current- 1995 318ti, sport model, schwartz
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Old 12-03-2007, 05:36 PM   #3
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The o-ring and bracket are the same part #'s for both diffs. That means the form and fit is the same for both sensors. I'm just gonna order a new o-ring and bracket . I can't see how the actual sensor can allow oil through it.

Quote:
Originally Posted by thesk8nmidget View Post
i used my speed sensor off my ti diff and used the bracket off my e30 diff to make it fit staright and tight. i havent had a problem with a leak yet.

my plug wouldnt work with the e30 speed sensor.
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-03-2007, 05:40 PM   #4
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yeah i doubt the sensor is leaking but the o ring is much more likely.



its for sure leaking from the sensor area??

not the drain plug or cover?
__________________
-Josh
Sold-1995 318ti, Club Sport, Hellrot
Sold-1996 318ti, Active Model, Boston Green
Current- 1995 318ti, sport model, schwartz
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Old 12-03-2007, 06:06 PM   #5
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We had the car up on a lift, and he had a drop light shining on it. Looked very convincing that the leak was from the sensor/o-ring.

Quote:
Originally Posted by thesk8nmidget View Post
yeah i doubt the sensor is leaking but the o ring is much more likely.



its for sure leaking from the sensor area??

not the drain plug or cover?
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-03-2007, 06:16 PM   #6
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Quote:
Originally Posted by L84THSKY View Post
We had the car up on a lift, and he had a drop light shining on it. Looked very convincing that the leak was from the sensor/o-ring.
hahah ok sounds like its the right spot, sounded like the mechanic was the one looking and not you.

mechanics can be worthless sometimes. just looking out
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-Josh
Sold-1995 318ti, Club Sport, Hellrot
Sold-1996 318ti, Active Model, Boston Green
Current- 1995 318ti, sport model, schwartz
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Old 12-03-2007, 06:52 PM   #7
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I think he was tired of me coming back about that leak. I stood right there under the car with him, when he pointed out the leak.

Quote:
Originally Posted by thesk8nmidget View Post
hahah ok sounds like its the right spot, sounded like the mechanic was the one looking and not you.

mechanics can be worthless sometimes. just looking out
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-07-2007, 09:47 PM   #8
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I just picked up the minor parts from the dealer to fix the leak in the rear of the diff. Here is my question. I can't remember if I used the stock speed sensor, or the 3.46LSD sensor. I ordered the stock Ti sensor, just because I knew the electrical interface connector would mate up.

From what I remember, the 3.46LSD speed sensor had one longer and one shorter half circle part that went into the diff on both sides of the ring. The new sensor I just bought had both protruding half circles the same size. Would a 318ti sensor fit in the 3.46 LSD? I just don't remember which one is in there.
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-07-2007, 09:51 PM   #9
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i used my stock one out of the ti diff.

and you are right one side is longer on the e30 so i was skeptical to if it would work or not but it does.

so use the stock ti sensor.
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Sold-1995 318ti, Club Sport, Hellrot
Sold-1996 318ti, Active Model, Boston Green
Current- 1995 318ti, sport model, schwartz
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Old 12-07-2007, 10:16 PM   #10
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Thanks

Quote:
Originally Posted by thesk8nmidget View Post
i used my stock one out of the ti diff.

and you are right one side is longer on the e30 so i was skeptical to if it would work or not but it does.

so use the stock ti sensor.
__________________

1998 (July) 318ti, 5-spd
OEM Armrest • Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player • Diamond Audio 5.25" rear speakers • Navman ICN 530 GPS • BMWALARM.COM (with comfort settings) after market alarm system • Magnecor 8.5mm wires • M-Z3 Shifter/Momo Knob • Burlwood Dashboard • Stromung Exhaust • X-brace • Racing Dynamics Front Strut Bar • Carbonio C.A.I. • 17" Rial Rims • Vader Seats/Heated/Lumbar Support • M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper • Depos/w 6500K Angel Eyes/6000K HIDs • Clear Corners • M3 Mirrors • UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave • E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts • UUC S.S. Brake/Clutch Lines • Hartge Roof Spoiler • BavAuto Springs• Bilstein Sport Struts/Shocks • E46 M3 Rear Shock Mounts • SPC Front Camber Kit • Reiger Hatch Spoiler • BavAuto Rear Camber Kit • Dinan Stage II Software • Turner Rear Sway Bar Reinforcements • BMW E46 Auto dimming mirror with Clown Nose alarm • Engine Compartment Light • Heated Wiper Fluid Retrofit • OEM Fire Extinguisher • Da'lan Trailer Hitch • Rear Sun Shade • OEM Fog Light Retrofit • H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links • Cruise Control Retrofit • On Board Computer Retrofit • M3 twistie style side skirts • Carbon Fiber Hood
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Old 12-07-2007, 10:34 PM   #11
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Quote:
Originally Posted by L84THSKY View Post
Thanks
no problem

-Josh
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Sold-1996 318ti, Active Model, Boston Green
Current- 1995 318ti, sport model, schwartz
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