Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300
Sign in using an external account
Register Forgot Password?

Need differential advice

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 05-29-14, 01:05 PM   #1
yushvaev
Driver School Candidate
Trader Score: (0)
 
yushvaev's Avatar
 
Join Date: Jan 2014
Location: canadian
Posts: 21
Default Need differential advice

Hi, I have a Soarer with the R154 and 1JZ twin turbo engine. My car doesn't drive anymore, Driveshaft spins but diff makes loud clunking noises so I would like to adress it ASAP.
what type of diff can I fit Under my soarer?
I heard SC400 diffs are direct bolt-ons but I need to be sure. I don't care about LSD open or whatever right now I just need it back on the roads and driving!
whichever cheapest diff I can get, I'll get it! Also I want it to be a direct bolt-on, no complications or whatnot, since I have a Soarer, the R154's driveshaft is different compared to MK3 supras and SC300 manuals.

please help!
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
yushvaev is offline   Reply With Quote
Old 05-29-14, 02:13 PM   #2
Maserati
Lead Lap
Trader Score: (1)
 
Join Date: Jan 2010
Location: Fl
Posts: 523
Default

Uh,if you can get a picture of the flange on the diff, you can then compare which diff you can use.
__________________
Maserati is offline   Reply With Quote
Old 05-29-14, 11:33 PM   #3
KahnBB6
Lexus Champion
Trader Score: (3)
 
Join Date: Jun 2010
Location: California
Posts: 1,807
Default

yushvaev,

If you are in this kind of an emergency I would recommend finding an early SC400 differential (3.92:1 ratio) or SC300 5-speed differential (4.083:1 ratio) or a 92-95 GS300 differential (4.083:1 BUT requires the Soarer companion flange to be swapped over. All of those diffs are non-LSD but you don't care right now.

Your Soarer, being an original R154 manual 1JZ car, has a 4.083:1 differential (could be LSD or Open depending on how it was ordered).

Any of the above diffs will allow the car to get back on the road while you take your Soarer diff to a good shop that works on differentials to sort out the issue or possibly rebuild it.

As for your driveshaft you will probably have something that *looks* slim like an SC300 5-speed front shaft but clearly isn't the same thing. Regardless, the diffs with the SC companion flange should bolt up and be identical to the Soarer versions. It's the Supra and GS companion flanges that must be swapped out in order to use those diffs (for example: doing a Supra TT Auto LSD diff swap requires this).

Hope it's not as bad as it sounds. Get your original diff diagnosed. You likely do have a Torsen T-2 LSD in there so it's worth getting it serviced.
__________________
1993 SC300 5-speed NA | Built R154 | Gixxer_Drew Susp. 600/325 | TT: brakes FR, rims, rear sway, seats | Koyo rad | 4.272 TT Torsen LSD
------------------------

Last edited by KahnBB6; 05-29-14 at 11:38 PM..
KahnBB6 is offline   Reply With Quote
Old 05-30-14, 12:01 AM   #4
yushvaev
Driver School Candidate
Trader Score: (0)
 
yushvaev's Avatar
 
Join Date: Jan 2014
Location: canadian
Posts: 21
Default

thanks a lot for the advice! I really appreciate.
I guess I should find either an SC400/SC300 pumpkin or GS300
the companion flange, does it come with the diff or I have to find one as well?
I'd really just like to buy a whole new pumpkin assembly and just bolt it up, if I need a companion flange then I'll have to look around more..
yushvaev is offline   Reply With Quote
Old 05-30-14, 12:12 AM   #5
yushvaev
Driver School Candidate
Trader Score: (0)
 
yushvaev's Avatar
 
Join Date: Jan 2014
Location: canadian
Posts: 21
Default

also my soarer is a plain old open diff 4.08
yushvaev is offline   Reply With Quote
Old 05-30-14, 09:19 AM   #6
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,786
Default

you can use any of those diffs, If the output or campanion flange on the new diff does not look the same and won't bolt to your driveshaft, you can just take the companion flange off your old diff and bolt it to the new one, its a straight swap just the front flange. then it should bolt up to the driveshaft. I don't think the diff's are different lengths so no need to change the drive shaft I would think if you swap out the font flange. count the number of turns to take it off and reinstall with the same amount of turns to keep the pre-load in the right ballpark on the big nut on the flange.
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)
Ali SC3 is offline   Reply With Quote
Old 05-30-14, 10:00 AM   #7
yushvaev
Driver School Candidate
Trader Score: (0)
 
yushvaev's Avatar
 
Join Date: Jan 2014
Location: canadian
Posts: 21
Default

alright guys thanks for the advice! I'll try to source out an SC400 diff
yushvaev is offline   Reply With Quote
Old 05-30-14, 10:00 AM
 
 
 
 
Reply

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
99 sc300 aristo swap driveshaft help needed sc300bigtx Performance & Maintenance 0 08-17-14 08:37 PM
Goes into gear but doesn't move yushvaev Performance & Maintenance 14 05-08-14 03:38 PM
washer(?) rattle with MKIII R154 driveshaft after carrier bearing swap-- advice? KahnBB6 Performance & Maintenance 7 10-15-13 08:38 PM
driveshaft length? 2JTsc300 Performance & Maintenance 4 05-31-13 05:23 AM
NY 97 sc400 diff & one piece driveshaft Fation SC400 / 300 Classifieds 0 04-11-13 05:50 PM

All times are GMT -7. The time now is 11:59 AM.

Join ClubLexus
Advertising


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


Get all contact info