Things To know When Looking For an LSD

LostMarine · 11-12-2009, 04:04 PM

I searched but couldn't find the info im looking for.

What do I need to know, or purchase in addition to, the actual LSD?
I see a few for sale but says "only fits "such and such" made from this date -to-that-date"

What am i missing?

Alex@AKMotorwerk · 11-12-2009, 04:14 PM

Quote:

Originally Posted by LostMarine

I searched but couldn't find the info im looking for.

What do I need to know, or purchase in addition to, the actual LSD?
I see a few for sale but says "only fits "such and such" made from this date -to-that-date"

What am i missing?

depending on ur build date and ur transmission, you might have a Welded stock diff or a Bolted stock diff... that is the biggest concern when purchasing an LSD, especially a used one. I believe some companies can tell from your VIN # if you have welded or bolted... the only other way would be to take the cover off the diff pumpkin and physically look at it. Good Luck... probably my next mod too

Craig@SupremePower · 11-12-2009, 04:17 PM

nice when you got money....

Quote:

Originally Posted by nj323ci

depending on ur build date and ur transmission, you might have a Welded stock diff or a Bolted stock diff... that is the biggest concern when purchasing an LSD, especially a used one. I believe some companies can tell from your VIN # if you have welded or bolted... the only other way would be to take the cover off the diff pumpkin and physically look at it. Good Luck... probably my next mod too

Alex@AKMotorwerk · 11-12-2009, 04:22 PM

Quote:

Originally Posted by Craig@SupremePower

nice when you got money....

Pfftttt... like ur not gonna get an LSD too

Pick up those mirror covers yet mr. short arms and deep pockets? LOL

Craig@SupremePower · 11-12-2009, 04:29 PM

Your treat?? The mirrors are home and ready to go!!!

Quote:

Originally Posted by nj323ci

Pfftttt... like ur not gonna get an LSD too

Pick up those mirror covers yet mr. short arms and deep pockets? LOL

Alex@AKMotorwerk · 11-12-2009, 05:18 PM

Quote:

Originally Posted by Nick.CBR

Are you serious about welded or bolted? Sounds like a question you'd ask a dude about his '84 Cutlass or something

What exactly is welded or bolted in the assembly?

Nick

I'm as serious as a heart attack!!!

Depending on your build date and transmission type, your ring gear is either welded or bolted to the carrier. If it is Welded, you need to buy an entire pumpkin with the LSD already installed and send your stock one back as a core (or find a competent shop to separate the welded ring gear and tap it)... if it is bolted then you can just buy the LSD and swap your ring gear onto it.

dlbrooks18 · 11-12-2009, 06:25 PM

PM Harold from HP Autowerks and he will answer any questions you have..

LostMarine · 11-12-2009, 08:15 PM

thank you.. awaiting their response

Kevin@AKMotorwerk · 11-18-2009, 08:58 AM

Quote:

Originally Posted by LostMarine

thank you.. awaiting their response

do you have auto or manual?

midlife · 11-18-2009, 09:09 AM

Quote:

Originally Posted by sexye92

do you have auto or manual?

good question:
if the OP is a manual and wants an LSD: he should get the lsd with the automatic gearing (342) instead of the lower gearing of the manual 304 (?).
this will give him better acceleration !

Kevin@AKMotorwerk · 11-18-2009, 09:15 AM

Quote:

Originally Posted by midlife

good question:
if the OP is a manual and wants an LSD: he should get the lsd with the automatic gearing (342) instead of the lower gearing of the manual 304 (?).
this will give him better acceleration !

exactly, plus i like the wavetrac better then the quaife and they only make it for the 6mt

scheherazade · 11-18-2009, 10:35 AM

You need to :
Pull the old diff from the carrier
Remove that sprocket/crown/ring from the old diff
Put the ring onto the new diff
Replace the (new) diff into the carrier.

If the ring is welded onto the old diff - good luck transferring the old ring to the new diff.
(It can be done, but you need to get a machine shop involved to precisely extract, drill, and tap your old ring.)
(You can also call diffsonline and just purchase a gearset from them, which will get you a new ring)

That's the problem you encounter with:
Manual Transmission, post Feb 07
Auto Transmission, pre Feb 07

pics :

This is what you're up against:
Old diff on left, with bolted-on ring (and bearings are still on it too, and this is not a 335 diff FYI).
New diff on right, without a ring.
You need to swap the ring (and bearings) to the new one.

Look at the BIG sprocket. The one with the biggest teeth.
(It's got some yellow on it).
On the left side of that sprocket, you see the heads from the bolts that screw it onto the differential.
(You can see 5 of them from here)

Ring attachment via bolts (note, this is an eaton diff, held in a vice):

Another similar pic (different differnetial)

Imagine last image, flipped 180 degrees (albeit this is a different diff pictured)

Link to a guy doing a ford ranger LSD install.
http://www.fourwheeler.com/projectbu.../photo_13.html

Thread to a guy doing an axle and diff and gearset swap
http://www.summitracing.com/expertad...9-00458158ca06

Thread to a guy doing a gearset swap (much of the same procedure as a diff swap)
http://www.jk-forum.com/showthread.php?t=82262

And just for fun, what looks like an OS giken LSD, exploded :

-scheherazade

Craig@SupremePower · 11-18-2009, 11:36 AM

according to wavetrac their working on a unit for the auto's and it should be out shortly..

RevC · 11-18-2009, 03:41 PM

whats your build date?

LostMarine · 11-18-2009, 04:30 PM

Im auto..

and i don't know my build date..

Amir87 · 11-18-2009, 04:42 PM

Quote:

Originally Posted by LostMarine

Im auto..

and i don't know my build date..

There should be a sticker on the driver side door jam. It should have xx/xx ex: 02/07 month and year.

RevC · 11-18-2009, 06:36 PM

^^^ driver side door jam, hope its a pre march build!

uberschnell · 11-18-2009, 08:27 PM

Quote:

Originally Posted by scheherazade

If the ring is welded onto the old diff - good luck transferring the old ring to the new diff.
(It can be done, but you need to get a machine shop involved to precisely extract, drill, and tap your old ring.)
(You can also call diffsonline and just purchase a gearset from them, which will get you a new ring)

That's the problem you encounter with:
Manual Transmission, post Feb 07
Auto Transmission, pre Feb 07

I beleive you mean Post Feb 07 for the auto. Pre Feb 07 most likely has a bolted diff.

M_M · 11-18-2009, 10:19 PM

FYI, mines Jul 07 built auto, but still got the bolted diff. if your final drive part no ending in 152 for example 33107566152, then yours bolted.

M_M · 11-18-2009, 10:22 PM

Quote:

Originally Posted by sexye92

exactly, plus i like the wavetrac better then the quaife and they only make it for the 6mt

I dont think so.. wavetracs been in my auto for quite some time.

scheherazade · 11-19-2009, 02:14 AM

Quote:

Originally Posted by MteK

I beleive you mean Post Feb 07 for the auto. Pre Feb 07 most likely has a bolted diff.

no, i mean pre.

-scheherazade

StartupJunkie · 11-19-2009, 02:48 AM

Yeah ... wavetrac was just put into my auto today ... too much fun!!

Quote:

Originally Posted by M_M

I dont think so.. wavetracs been in my auto for quite some time.

11-12-2009, 04:04 PM	#1
LostMarine Banned 40 Rep 950 Posts Drives: Lying Vendors Crazy Join Date: Jul 2009 Location: F**K You Up- NJ iTrader: (2)	Things To know When Looking For an LSD I searched but couldn't find the info im looking for. What do I need to know, or purchase in addition to, the actual LSD? I see a few for sale but says "only fits "such and such" made from this date -to-that-date" What am i missing?
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11-12-2009, 06:25 PM	#7
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	PM Harold from HP Autowerks and he will answer any questions you have.. __________________ 2008 E90 335
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11-12-2009, 08:15 PM	#8
LostMarine Banned 40 Rep 950 Posts Drives: Lying Vendors Crazy Join Date: Jul 2009 Location: F**K You Up- NJ iTrader: (2)	thank you.. awaiting their response
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11-18-2009, 10:35 AM	#12
scheherazade Major 37 Rep 1,467 Posts Drives: 09 GTR (& 93' accord!) Join Date: Sep 2008 Location: DC metro area iTrader: (8)	You need to : Pull the old diff from the carrier Remove that sprocket/crown/ring from the old diff Put the ring onto the new diff Replace the (new) diff into the carrier. If the ring is welded onto the old diff - good luck transferring the old ring to the new diff. (It can be done, but you need to get a machine shop involved to precisely extract, drill, and tap your old ring.) (You can also call diffsonline and just purchase a gearset from them, which will get you a new ring) That's the problem you encounter with: Manual Transmission, post Feb 07 Auto Transmission, pre Feb 07 pics : This is what you're up against: Old diff on left, with bolted-on ring (and bearings are still on it too, and this is not a 335 diff FYI). New diff on right, without a ring. You need to swap the ring (and bearings) to the new one. Look at the BIG sprocket. The one with the biggest teeth. (It's got some yellow on it). On the left side of that sprocket, you see the heads from the bolts that screw it onto the differential. (You can see 5 of them from here) Ring attachment via bolts (note, this is an eaton diff, held in a vice): Another similar pic (different differnetial) Imagine last image, flipped 180 degrees (albeit this is a different diff pictured) Link to a guy doing a ford ranger LSD install. http://www.fourwheeler.com/projectbu.../photo_13.html Thread to a guy doing an axle and diff and gearset swap http://www.summitracing.com/expertad...9-00458158ca06 Thread to a guy doing a gearset swap (much of the same procedure as a diff swap) http://www.jk-forum.com/showthread.php?t=82262 And just for fun, what looks like an OS giken LSD, exploded : -scheherazade Last edited by scheherazade; 11-18-2009 at 10:59 AM..
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11-18-2009, 11:36 AM	#13
Craig@SupremePower G.O.A.T.! 1018 Rep 74,992 Posts Drives: '18 GMC Yukon XL Join Date: Mar 2008 Location: New Jersey iTrader: (14)	according to wavetrac their working on a unit for the auto's and it should be out shortly..
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11-18-2009, 03:41 PM	#14
RevC Lieutenant General 179 Rep 11,768 Posts Drives: a couple fast toys Join Date: Jun 2009 Location: Voorhees+cherry hill,NJ iTrader: (26)	whats your build date? __________________ -Rev SGM e92 335xi\|Helix\|AFE\|AWE\|PROCEDE\|SYNAPSE\|ER\|OSS\|BMW PERFORMANCE\|P3\|always growing..
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11-18-2009, 04:30 PM	#15
LostMarine Banned 40 Rep 950 Posts Drives: Lying Vendors Crazy Join Date: Jul 2009 Location: F**K You Up- NJ iTrader: (2)	Im auto.. and i don't know my build date..
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11-18-2009, 06:36 PM	#17
RevC Lieutenant General 179 Rep 11,768 Posts Drives: a couple fast toys Join Date: Jun 2009 Location: Voorhees+cherry hill,NJ iTrader: (26)	^^^ driver side door jam, hope its a pre march build! __________________ -Rev SGM e92 335xi\|Helix\|AFE\|AWE\|PROCEDE\|SYNAPSE\|ER\|OSS\|BMW PERFORMANCE\|P3\|always growing..
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11-18-2009, 10:19 PM	#19
M_M Second Lieutenant 9 Rep 224 Posts Drives: 335i Join Date: Oct 2008 Location: Earth iTrader: (0)	FYI, mines Jul 07 built auto, but still got the bolted diff. if your final drive part no ending in 152 for example 33107566152, then yours bolted.
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