Rear diff leaks!

OkStateMET · 02-20-2009, 10:12 PM

today i got my oil changed and the shop told me my rear diff was leaking, every where! although they said it was full of fluid? I was told it is leaking from the input shaft and both drive axles. I havent ever herd of bmw having problems with the rear diff, im thinking its just the seals or gaskets? but i do have 145,xxx miles. any suggestions/input can i fix this my self?

OkStateMET · 02-22-2009, 02:56 PM

ttt need some advice....

OkStateMET · 02-22-2009, 11:04 PM

anyone?

330i ZHP · 02-22-2009, 11:29 PM

the seals must be leaking and they are pressed in - not diy

the removal and installation of the diff is diy and can be done in about an hour (in and out), but I have a ton of experience with it

you will need the proper e-Torx socket for the bolts securing the input and output shafts

UKtRAINE3 · 02-22-2009, 11:45 PM

yeah mine was leaking at the input shaft at like 45k miles.. and now there's a tiny leak at one of the axles.. You're lucky to have it leak at 145,xxx miles LOL... get the seals done or just buy a low mileage differential and put that in, that way you can fix and mod your car at the same time.

330i ZHP · 02-22-2009, 11:45 PM

good idea

SpeedDemon · 02-23-2009, 03:15 AM

If you have a manual 323 then you have a 3.07 final drive. This is a great opportunity to buy a 3.46 diff from a local junk yard and just have it installed. Not only will you get a performance increase but you'll also have your car fixed for less money.

OkStateMET · 02-23-2009, 11:58 AM

i have an automatic, would i still want a 3.46? I don't know very much about this, i think this improves the acceleration with a smaller rotating final drive gear??? smaller gear rotates more times, spinning the wheels more times, thus faster? is this the concept?

02-20-2009, 10:12 PM	#1
OkStateMET Registered User Join Date: Jan 2009 Location: Tulsa Posts: 157 My Ride: 1999 323i View My Garage	Rear diff leaks! today i got my oil changed and the shop told me my rear diff was leaking, every where! although they said it was full of fluid? I was told it is leaking from the input shaft and both drive axles. I havent ever herd of bmw having problems with the rear diff, im thinking its just the seals or gaskets? but i do have 145,xxx miles. any suggestions/input can i fix this my self?

02-22-2009, 11:29 PM	#4
330i ZHP Registered User Join Date: Mar 2005 Location: Washington, DC Posts: 20,535 My Ride: have 5 doors and FI View My Garage	the seals must be leaking and they are pressed in - not diy the removal and installation of the diff is diy and can be done in about an hour (in and out), but I have a ton of experience with it you will need the proper e-Torx socket for the bolts securing the input and output shafts __________________ /_________\ OO=[][]=OO

02-22-2009, 11:45 PM	#6
330i ZHP Registered User Join Date: Mar 2005 Location: Washington, DC Posts: 20,535 My Ride: have 5 doors and FI View My Garage	good idea __________________ /_________\ OO=[][]=OO

02-23-2009, 03:15 AM	#7
SpeedDemon Registered User Join Date: Jul 2003 Location: Seattle Posts: 1,934 My Ride: 08 M3/05 ZHP/02 325i View My Garage	If you have a manual 323 then you have a 3.07 final drive. This is a great opportunity to buy a 3.46 diff from a local junk yard and just have it installed. Not only will you get a performance increase but you'll also have your car fixed for less money. __________________ Click here for pics and info about my ZHP

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02-22-2009, 02:56 PM	#2
OkStateMET Registered User Join Date: Jan 2009 Location: Tulsa Posts: 157 My Ride: 1999 323i View My Garage	ttt need some advice....

02-22-2009, 11:04 PM	#3
OkStateMET Registered User Join Date: Jan 2009 Location: Tulsa Posts: 157 My Ride: 1999 323i View My Garage	anyone?

02-22-2009, 11:45 PM	#5
UKtRAINE3 Banned Join Date: Aug 2005 Location: Boston Posts: 1,273 My Ride: ///M3 View My Garage	yeah mine was leaking at the input shaft at like 45k miles.. and now there's a tiny leak at one of the axles.. You're lucky to have it leak at 145,xxx miles LOL... get the seals done or just buy a low mileage differential and put that in, that way you can fix and mod your car at the same time.

02-23-2009, 11:58 AM	#8
OkStateMET Registered User Join Date: Jan 2009 Location: Tulsa Posts: 157 My Ride: 1999 323i View My Garage	i have an automatic, would i still want a 3.46? I don't know very much about this, i think this improves the acceleration with a smaller rotating final drive gear??? smaller gear rotates more times, spinning the wheels more times, thus faster? is this the concept?