Go Back   Club Lexus Forums > Lexus Model Forums > RX Models > RX - First Generation
Sign in using an external account
Register Forgot Password?

What type of LSD in a 99 RX300?

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 07-25-12, 06:26 AM   #1
sktn77a
Lexus Champion
Trader Score: (1)
 
sktn77a's Avatar
 
Join Date: Oct 2002
Location: Chapel Hill, NC
Posts: 1,848
Default What type of LSD in a 99 RX300?

OK, the local dealers haven't got a clue - half of them say I have a clutch type LSD and the rest say I have a torsen type (I definitely have an LSD - it's on the window sticker). My understanding is that it is a clutch type but the gear oil is different for the two so I want to be sure.

Lexus Gurus........ which witch is which???

This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
Keith

2010 Toyota Prius
2008 Lexus IS250
2007 Lexus LS460
2005 Toyota Prius
1999 Lexus RX300 AWD
sktn77a is offline   Reply With Quote
Old 07-25-12, 06:36 AM   #2
thomas1
Lexus Champion
Trader Score: (0)
 
thomas1's Avatar
 
Join Date: Sep 2006
Location: Sacramento, California
Posts: 2,280
Default

you know I just added fluid that met Lexus/Toyota specs....if it says for Limited slip you should be good. I used Royal purple and Mobil 1 limited slip gear oil and had no problems for the ownership of my Lexus RX300 till 183K miles when I sold it.
__________________
1999 RX300
2008 RX400h
Moved up to hybrid land

super home mechanic
Protect our Constitution, Tea Party
Papa to 9, 7 girls, 2 boys
thomas1 is offline   Reply With Quote
Old 07-25-12, 07:16 AM   #3
reisjdmd
Rookie
Trader Score: (0)
 
Join Date: Apr 2012
Location: wi
Posts: 75
Default

holy cow, i thought you were talking about drugs, whcih would explain why these cars have some of the weird problems they have.
reisjdmd is offline   Reply With Quote
Old 07-25-12, 07:47 AM   #4
carguy07
Lexus Test Driver
Trader Score: (0)
 
carguy07's Avatar
 
Join Date: Nov 2005
Location: OH
Posts: 1,478
Default

It's a Torsen: http://en.wikipedia.org/wiki/Torsen

Like thomas1 said just use gear oil that says it's good for LSD like Mobil 1, Royal Purple etc, and you are good to go.
carguy07 is offline   Reply With Quote
Old 07-25-12, 07:54 AM   #5
DaveGS4
Forum Administrator
Trader Score: (2)
 
DaveGS4's Avatar
 
Join Date: Feb 2001
Location: North Carolina
Posts: 25,952
profile.php?id=100001050339562 @DaveGS4 DaveGS4 The Real DaveGS4
Default

He's correct that the two different types of LSD (clutch, torsen) take different fluids. The clutch type uses a friction modifier which sometimes comes built into the fluid or can be put in as an additive to the normal gear oil.

I believe that I've actually bought a friction modifier additive from the Lexus dealer parts counter meant for the RX in the past. This was 10 years ago though.
__________________

*** Click image for team info! ***

LS430 Ultra * PCS * ML * Rear Fridge * Massaging and Reclining Rear Seats * Vaistech SL-I * Coastal Lockpick

Tundra SR5 5.7 and BMW E36 M3/4 track car (wife's)

** Want to put your PC to good use every night?** Click here to join the Club Lexus Folding Team and help find a cure for cancer and other diseases. May the force be with you.
DaveGS4 is offline   Reply With Quote
Old 07-25-12, 01:24 PM   #6
PaulDaisy
Driver School Candidate
Trader Score: (0)
 
PaulDaisy's Avatar
 
Join Date: Jul 2012
Location: Colorado
Posts: 42
Default

Torsen it is: http://www.google.com/url?sa=t&rct=j...BDRvJIaQymZnug
...and I read elsewhere that starting in 2001, the real LSD was eliminated and replaced by electronic traction control, right?

Last edited by PaulDaisy; 07-25-12 at 01:31 PM..
PaulDaisy is offline   Reply With Quote
Old 07-25-12, 02:18 PM   #7
sktn77a
Lexus Champion
Trader Score: (1)
 
sktn77a's Avatar
 
Join Date: Oct 2002
Location: Chapel Hill, NC
Posts: 1,848
Default

Correct. They discontinued the LSD in 2001 when the added traction control (making the LSD redundant). It certainly appears to be a Torsen LSD in the 1999 and 2000 RX300. I wonder where I saw the "requirement" for the friction enhancing additive (which is used in clutch-type LSDs)?
__________________
Keith

2010 Toyota Prius
2008 Lexus IS250
2007 Lexus LS460
2005 Toyota Prius
1999 Lexus RX300 AWD
sktn77a is offline   Reply With Quote
Old 07-25-12, 03:04 PM   #8
PaulDaisy
Driver School Candidate
Trader Score: (0)
 
PaulDaisy's Avatar
 
Join Date: Jul 2012
Location: Colorado
Posts: 42
Default

I'm not sure I'd agree if the traction control is redundant unless, like the Cherokees with the Trail package, they have something going on with the rear and front differentials. For that, the rear diff on my 2001 looks way too small and unsophisticated. So I conclude, there is no inter-wheel traction control, only inter-axle. Which is far from the same as a LSD.
All of this is quite irrelevant from the off road perspective though as probably very few people would seriourly use their Lexus in the conditions that would benefit from LSD. And for city snow and slick, the inter-axle torque distribution is probably just fine.
PaulDaisy is offline   Reply With Quote
Old 07-25-12, 04:11 PM   #9
salimshah
Moderator
Trader Score: (0)
 
Join Date: Apr 2001
Location: Austin, TX
Posts: 8,051
Default

It is a long story...

The AWD design in the early models was a bust due to viscous fluid coupling. In those days Mercedes was the only competition in Lux-sport-utility. They made special ramps with rollers and demoed that RX has a bad design. [RX with FWD with traction control could climb, but they did not demo that ].

I am sure that each design has a weak point and every system has a limitation. Fortunately, people dont push their vehicle to the limit.

I miss the long heated posts by wwest .. maybe they reside some where on the net ,,, but I am talking about things that happened about 12 years.

Salim

Last edited by salimshah; 07-25-12 at 04:15 PM..
salimshah is offline   Reply With Quote
Old 07-25-12, 06:04 PM   #10
hypervish
Lexus Champion
Trader Score: (0)
 
hypervish's Avatar
 
Join Date: Aug 2009
Location: NJ
Posts: 4,642
lexusvishal
Default

Quote:
Originally Posted by salimshah View Post
It is a long story...

The AWD design in the early models was a bust due to viscous fluid coupling. In those days Mercedes was the only competition in Lux-sport-utility. They made special ramps with rollers and demoed that RX has a bad design. [RX with FWD with traction control could climb, but they did not demo that ].

I am sure that each design has a weak point and every system has a limitation. Fortunately, people dont push their vehicle to the limit.

I miss the long heated posts by wwest .. maybe they reside some where on the net ,,, but I am talking about things that happened about 12 years.

Salim
He's still very active on the Edmunds forum. Let's just say I'm glad he isn't hanging around CL anymore.
__________________
hypervish is offline   Reply With Quote
Old 07-26-12, 03:01 AM   #11
Lexmex
Super Moderator
Trader Score: (0)
 
Lexmex's Avatar
 
Join Date: Apr 2004
Location: Miami, Florida
Posts: 16,379
Default

wwest was the guy who figured out the daytime driving lights fix by pulling out the cable underneath the battery tray
__________________
Homepage of my 1999 RX300 AWD
Lexmex is offline   Reply With Quote
Old 07-26-12, 06:31 AM   #12
thomas1
Lexus Champion
Trader Score: (0)
 
thomas1's Avatar
 
Join Date: Sep 2006
Location: Sacramento, California
Posts: 2,280
Default

Heck I miss his post, they were very detailed. (wwest) and of course enlightening.
__________________
1999 RX300
2008 RX400h
Moved up to hybrid land

super home mechanic
Protect our Constitution, Tea Party
Papa to 9, 7 girls, 2 boys
thomas1 is offline   Reply With Quote
Old 07-26-12, 07:10 AM   #13
hypervish
Lexus Champion
Trader Score: (0)
 
hypervish's Avatar
 
Join Date: Aug 2009
Location: NJ
Posts: 4,642
lexusvishal
Default

Really? I remember reading his posts, and they all sounded very negative, although it sounded as though he knew what he was talking about for sure! He was very informative. But, mind you, I wasn't a member of the forum at that time ; I only read the posts, and maybe I'm remembering them wrong.
__________________
hypervish is offline   Reply With Quote
Old 07-29-12, 11:02 PM   #14
salimshah
Moderator
Trader Score: (0)
 
Join Date: Apr 2001
Location: Austin, TX
Posts: 8,051
Default

One of the things we request that when a discussion stops being meaningful, or posts keep repeating the same point, then it is better to stop.

Salim
salimshah is offline   Reply With Quote
Old 07-29-12, 11:02 PM
 
 
 
 
Reply

Tags
300, accord, awd, enhanced, gearbox, honda, lexus, limited, lsd, oil, pictures, rx, rx300, slip, transaxle, type

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 11:43 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info