monstaru Posted February 4, 2009 Share Posted February 4, 2009 (edited) never seen the inside of one of the VLSD's.anyone have pics? the chunk on the left has all of the characteristics of an LSD.the right is obviously open.these both came from 4.44 diffs.the open from an outback,and the maybe vlsd from a 2002 forester.what ye say? more pics here cheers, brian Edited February 4, 2009 by monstaru Link to comment Share on other sites More sharing options...
subystomper Posted February 5, 2009 Share Posted February 5, 2009 You sure it's an lsd or vlsd? They both look like open diffs to me. Link to comment Share on other sites More sharing options...
The Scooby Posted February 5, 2009 Share Posted February 5, 2009 both are open, you can tell by the spider gear pin that goes through the middle. Link to comment Share on other sites More sharing options...
monstaru Posted February 5, 2009 Author Share Posted February 5, 2009 well then,someone have a pic of the VLSD chunk? because i have been into many a diff and the one on the left passes the spin test (both stubs i inserted turned in the same direction)as the one on the right does not. i have also had my hands on several clutch pack LSD's and know what the characteristics are.that pin through the middle had me fooled as well.but the extra plate matching the ring gear depth on the one on the left is what has me questioning things.it appears that if removed it would take the pressure off of the rest of the ring gear mount...which leads me to believe it is holding something in there,like a viscous unit. maybe it is aftermarket,it did come from a 2002 forester,and has some recent writing on it that matched some writing on the case.which leads me to believe it had been serviced as of late... and if you lok at the other pics on photobucket,you can see the difference in spider gears,the open diff spider gears are open at the end of the teeth,the other one has a lip at the end of the teeth with corresponding bevel on the other spider gears. not saying i know everything for sure,but if it barks like a dog,walks like a dog,and ************s like a dog....its probably a dog.ya know.:lol:cheers, brian Link to comment Share on other sites More sharing options...
idosubaru Posted February 5, 2009 Share Posted February 5, 2009 the one on the left passes the spin test (both stubs i inserted turned in the same direction)as the one on the right does not.isn't it only the clutch type LSD's that do that? i thought the VLSD's acted like open until it starts to slip? Link to comment Share on other sites More sharing options...
The Beast I Drive Posted February 5, 2009 Share Posted February 5, 2009 Hey Brian, both those diffs are open, but if the one acts like an LSD, i bet it has one of those Phantom Grip mods done to it, or something is seriously wrong with it. Vlsd units are not good for offroad, they only engage after traction is lost and at higher speeds than crawling. Your best bet is to convert a 3.7 LSD unit to your 4.444 gears. -Bill Link to comment Share on other sites More sharing options...
monstaru Posted February 5, 2009 Author Share Posted February 5, 2009 (edited) no, no they aren't both open. the one on the left has SOME sort of locking mechanism associated with the little extra plate where the ring gear mounts. you can even see the difference in this photo of the casing. ] the difference can be seen here,at the bottom of the casing there is more meat right above that plate. and here, where that plate connects to the outside....... whatever that plate does or has behind it,locks that sides spider gear,then in turn does not allow the center to rotate therefore locking the other spider gear.it is not open.there is no damage anywhere on it either. it is not a phantom grip ,as those are big and bulky and go in the center of the diff.and i have an lsd going into this 4.44 case, that is the whole reasoning i opened this up and found what i have found.i am well aware of what characteristics i wish to have for offroad. cheers, brian Edited February 5, 2009 by monstaru Link to comment Share on other sites More sharing options...
mcbrat Posted February 5, 2009 Share Posted February 5, 2009 those side pieces look like they could be the sealed viscous units, but they are kinda "small".... other examples/info: http://www.miata.net/garage/diffguide/index.html http://www.awd.ee/viscous.html http://www.autozine.org/technical_school/traction/tech_traction_4wd_2.htm http://www.stealth316.com/2-awd5.htm and a Really good read here.... http://forums.hybridz.org/showthread.php?t=116207 Link to comment Share on other sites More sharing options...
baccaruda Posted February 5, 2009 Share Posted February 5, 2009 It's not really an extra plate as much as the chunk case itself is two pieces.. looks a LOT like the illustration in Mick's stealth316 link (4th pic up from bottom). ...the one on the left has SOME sort of locking mechanism associated with the little extra plate where the ring gear mounts. Link to comment Share on other sites More sharing options...
Gloyale Posted February 5, 2009 Share Posted February 5, 2009 The one on the left is the VLSD. If you were to seperate the 2 halves of the chunk, you would find the *bottom in pic* spider gear actually is actually a friction plate, and the viscous coupler is *underneath it. VLSD is a form of open diff. It takes alot of *slip* before it really locks. However, in an unloaded test, there is enough stick between the plates that both stubs will turn the same way. But I can tell you just looking at it that is a VLSD Link to comment Share on other sites More sharing options...
Gloyale Posted February 5, 2009 Share Posted February 5, 2009 Hey Brian, both those diffs are open, but if the one acts like an LSD, i bet it has one of those Phantom Grip mods done to it, or something is seriously wrong with it. Vlsd units are not good for offroad, they only engage after traction is lost and at higher speeds than crawling. Your best bet is to convert a 3.7 LSD unit to your 4.444 gears.-Bill I don't want ot here people arm chair wheeling the VLSDs They work damn good for Offroad. Everyone who bashes on them here has never actaully wheeled with one. Don't talk about ************ you don't know Link to comment Share on other sites More sharing options...
monstaru Posted February 6, 2009 Author Share Posted February 6, 2009 welp,i am pretty sure that this is a vlsd too.hopefully these pics do not get lost and we have a reference point from here on out. cheers, brian The one on the left is the VLSD. If you were to seperate the 2 halves of the chunk, you would find the *bottom in pic* spider gear actually is actually a friction plate, and the viscous coupler is *underneath it. VLSD is a form of open diff. It takes alot of *slip* before it really locks. However, in an unloaded test, there is enough stick between the plates that both stubs will turn the same way. But I can tell you just looking at it that is a VLSD Link to comment Share on other sites More sharing options...
torxxx Posted February 6, 2009 Share Posted February 6, 2009 I don't want ot here people arm chair wheeling the VLSDs They work damn good for Offroad. Everyone who bashes on them here has never actaully wheeled with one. Don't talk about ************ you don't know Yup get a VLSD in the mud and tell me how it works. I Love mine. Awesome for coming out of corners too on the ice track cuz it will lock up on exit instead of entrance. Leaves the car predictable into corners not wondering when the clutch type LSD is going to lock in. Link to comment Share on other sites More sharing options...
Gloyale Posted February 6, 2009 Share Posted February 6, 2009 well, the pics posted by Gravityman in this thread: http://www.ultimatesubaru.org/forum/showthread.php?t=72899&highlight=open+diff are gone, but it was essentially the same topic. He actually took out those screw that hold the 2 piecwes toghehter and examined the friction plates. the descrition is still there, but again his photo's are gone. * note that the picture post by NumbChux in that thread are of a older Clutch type LSD Link to comment Share on other sites More sharing options...
Caboobaroo Posted February 6, 2009 Share Posted February 6, 2009 This is making me more excited for my VLSD:banana: Link to comment Share on other sites More sharing options...
rguyver Posted February 6, 2009 Share Posted February 6, 2009 Left is a VLSD and right is a open , note the large cone washer on the end spider gear and the case thickness difference , this diff is build for smooth operation and low traction , like ice and mud , not all out rock crawling , but any grip is better then transferring power to the wheel that has nun . from what ive seen the older 85_? RX LSD's and 90's-? STI's have the stiffest clutch packs , they cause a lot of under steer !! but great off road !! Link to comment Share on other sites More sharing options...
mcbrat Posted February 6, 2009 Share Posted February 6, 2009 well, the pics posted by Gravityman in this thread: http://www.ultimatesubaru.org/forum/showthread.php?t=72899&highlight=open+diff are gone, but it was essentially the same topic. He actually took out those screw that hold the 2 piecwes toghehter and examined the friction plates. the descrition is still there, but again his photo's are gone. * note that the picture post by NumbChux in that thread are of a older Clutch type LSD I fixed the photo links in this post, but it's only temporary. IF someone want to save them, and rehost, that'd be great.... or I may grab them and add them to the old static USRM and the Forum Based USRM... Link to comment Share on other sites More sharing options...
baccaruda Posted February 6, 2009 Share Posted February 6, 2009 Brian, THIS is the thread I was telling you I remembered. I KNEW I wasn't crazy! I specifically recalled someone pulling a switcheroo well, the pics posted by Gravityman in this thread: http://www.ultimatesubaru.org/forum/showthread.php?t=72899&highlight=open+diff are gone, but it was essentially the same topic. He actually took out those screw that hold the 2 piecwes toghehter and examined the friction plates. the descrition is still there, but again his photo's are gone. * note that the picture post by NumbChux in that thread are of a older Clutch type LSD Link to comment Share on other sites More sharing options...
monstaru Posted February 6, 2009 Author Share Posted February 6, 2009 awesome, i just saved those photos to photobucket mick, thanks a bunch.i guess i do not keep up with the times enough to have seen that post. well, it looks like i have a VLSD .:lol:cheers, brian Link to comment Share on other sites More sharing options...
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