# LSD Oil? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [September 2, 2008, 7:10pm UTC](https://forums.speedlife.net/t/lsd-oil/118172 "2008-09-02T19:10:21Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![DiscoQuinn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/discoquinn/32/3216_2.png) [@DiscoQuinn](https://forums.speedlife.net/u/DiscoQuinn)\ **Post date:** [September 2, 2008, 7:10pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/1 "2008-09-02T19:10:21Z")
I’ve got some bottles of fresh 80w90, I’m told there is an additive that I need or will help with locking? ---
**Author:** ![Jowo72](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jowo72/32/5560_2.png) [@Jowo72](https://forums.speedlife.net/u/Jowo72)\ **Post date:** [September 2, 2008, 7:18pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/2 "2008-09-02T19:18:35Z")
I can get the good stuff from my work (GM dealership) ---
**Author:** ![simplemind7](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@simplemind7](https://forums.speedlife.net/u/simplemind7)\ **Post date:** [September 2, 2008, 7:24pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/3 "2008-09-02T19:24:20Z")
just check out CT. it’s fairly common. ---
**Author:** ![nd4boost](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nd4boost/32/5627_2.png) [@nd4boost](https://forums.speedlife.net/u/nd4boost)\ **Post date:** [September 2, 2008, 7:28pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/4 "2008-09-02T19:28:29Z")
if its a vlsd than no additive will help it lock its a sealed unit keeping cool will help longevety. clutch types need additive ---
**Author:** ![Zman86](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zman86/32/5694_2.png) [@Zman86](https://forums.speedlife.net/u/Zman86)\ **Post date:** [September 2, 2008, 7:29pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/5 "2008-09-02T19:29:05Z")
I read on here that the stock VLSD is a sealed unit, so you do not need to add a friction modifier to your fluid. I run Royal Purple in mine, and it has the limited slip additive allready in it anyways. Someone feel free to verify my info or correct me if I’m wrong. ---
**Author:** ![Jowo72](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jowo72/32/5560_2.png) [@Jowo72](https://forums.speedlife.net/u/Jowo72)\ **Post date:** [September 2, 2008, 7:45pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/6 "2008-09-02T19:45:23Z")
this is true, if its a viscous LSD you won’t need friction modifier. Usually only in clutch type differentials. ---
**Author:** ![DiscoQuinn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/discoquinn/32/3216_2.png) [@DiscoQuinn](https://forums.speedlife.net/u/DiscoQuinn)\ **Post date:** [September 2, 2008, 7:46pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/7 "2008-09-02T19:46:38Z")
Non viscous, but I’m reading a bit about this friction modifier and it seems to reduce locking to get smoother cornering…but I want aggressive differential properties for sidewhizzle action. ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [September 2, 2008, 8:10pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/8 "2008-09-02T20:10:22Z")
i use royal purple in all my vehicles. never ever had a complaint. accept that it leaks out of my 9" in my s15 (jimmy) got it in my vlsd now, s-10 (clutch/cooko clock style) s15 full spool, and i’ve tried it with the old style spring posi. works awesome. just grab the viscosity the manufacture calls for . 75W90 80W90 145W90 there is so many. usually i put an additive in anyways…not gonna hurt it. plus it helps with the seals ---
**Author:** ![Zman86](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zman86/32/5694_2.png) [@Zman86](https://forums.speedlife.net/u/Zman86)\ **Post date:** [September 2, 2008, 8:16pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/9 "2008-09-02T20:16:43Z")
I went to performance improvements to get 80w90, and they told me it only comes in 5gallon pails at $319. Had to settle for 75w90 @ $20/bottle ---
**Author:** ![SlidewaysRPS13](https://avatars.discourse-cdn.com/v4/letter/s/c6cbf5/32.png) [@SlidewaysRPS13](https://forums.speedlife.net/u/SlidewaysRPS13)\ **Post date:** [September 2, 2008, 8:20pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/10 "2008-09-02T20:20:10Z")
^ first off you went to Performance Improvements for sumthing…lol ---
**Author:** ![Zman86](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zman86/32/5694_2.png) [@Zman86](https://forums.speedlife.net/u/Zman86)\ **Post date:** [September 2, 2008, 8:49pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/11 "2008-09-02T20:49:49Z")
I know, I’m ashamed too, but its the only place I could think of that sold Royal purple… ---
**Author:** ![Cal-SoY](https://avatars.discourse-cdn.com/v4/letter/c/91b2a8/32.png) [@Cal-SoY](https://forums.speedlife.net/u/Cal-SoY)\ **Post date:** [September 2, 2008, 9:22pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/12 "2008-09-02T21:22:28Z")
I go to Canadian tire, look on the shelves for a motomaster 4L jug with a cement mixer on the front sticker and i just fill up the diff with that. Best shit i’ve ever used. ---
**Author:** ![simplemind7](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@simplemind7](https://forums.speedlife.net/u/simplemind7)\ **Post date:** [September 2, 2008, 9:55pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/13 "2008-09-02T21:55:01Z")
hahaha. dump truck brand really is the shit. you don’t need anything more than that for a 240. ---
**Author:** ![KA24Power](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ka24power/32/5595_2.png) [@KA24Power](https://forums.speedlife.net/u/KA24Power)\ **Post date:** [September 2, 2008, 9:57pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/14 "2008-09-02T21:57:47Z")
just make sure you don’t use it in the tranny too… ---
**Author:** ![simplemind7](https://avatars.discourse-cdn.com/v4/letter/s/0ea827/32.png) [@simplemind7](https://forums.speedlife.net/u/simplemind7)\ **Post date:** [September 2, 2008, 10:03pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/15 "2008-09-02T22:03:58Z")
> [@Best collector EVER!!!](https://forums.speedlife.net/t/best-collector-ever/18199/10): > > just make sure you don’t use it in the tranny too… why nat. it’s been in every tranny i’ve owned, works great. me and some others have a 13 second 88 mx6 (soon to be 12s) that is rocking it for tranny fluid. it’s the fastest shifting stock tranny i have ever driven… and we don’t lift the throttle when we shift. dump truck brand has done me no wrong. ---
**Author:** ![njd07](https://avatars.discourse-cdn.com/v4/letter/n/a9a28c/32.png) [@njd07](https://forums.speedlife.net/u/njd07)\ **Post date:** [September 2, 2008, 10:45pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/16 "2008-09-02T22:45:42Z")
your not suppose to use that in the tranny cuz its a GL-5. tranny prefers a GL-4 type oil. GL-5 is harder on the syncros. ---
**Author:** ![KA24Power](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ka24power/32/5595_2.png) [@KA24Power](https://forums.speedlife.net/u/KA24Power)\ **Post date:** [September 2, 2008, 10:47pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/17 "2008-09-02T22:47:23Z")
yeeah, FAG! …no I did notice harder shifting after putting the wrong stuff in the old s13. not night and day, but it progressively got shittier at shifting ---
**Author:** ![Dominik](https://avatars.discourse-cdn.com/v4/letter/d/ee7513/32.png) [@Dominik](https://forums.speedlife.net/u/Dominik)\ **Post date:** [September 2, 2008, 11:20pm UTC](https://forums.speedlife.net/t/lsd-oil/118172/18 "2008-09-02T23:20:02Z")
I had a problem with a sticking clutches. As forementioned. I used GM LSD friction modifier. along with fresh GL-5 fluid, the difference was instant. No more rear end chatter. Feels very smooth. ---
**Author:** ![DiscoQuinn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/discoquinn/32/3216_2.png) [@DiscoQuinn](https://forums.speedlife.net/u/DiscoQuinn)\ **Post date:** [September 3, 2008, 6:29am UTC](https://forums.speedlife.net/t/lsd-oil/118172/19 "2008-09-03T06:29:26Z")
I’m getting a very loud chatter right now, I assume it’s because my diff is probably bone dry. :S ---
**Author:** ![KA24Power](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ka24power/32/5595_2.png) [@KA24Power](https://forums.speedlife.net/u/KA24Power)\ **Post date:** [September 3, 2008, 10:43am UTC](https://forums.speedlife.net/t/lsd-oil/118172/20 "2008-09-03T10:43:05Z")
quinn put fluid in it! GOGOGOGOGOGO I have a fluid vacuum pump type of thing at work, I can pick it up tonight and you can throw some fluid in it tomorrow if you want. get at me on msn later, brah! [Next page](https://forums.speedlife.net/t/lsd-oil/118172.md?page=2)