Hi,

Just doing some research into the diffs on the altezza SXE10 RS200. I have come to the conclusion that the standard diff is a torsen one. Can anyone comfirm this? As all I have deon is some internet research etc.

The reason for this info is that I am getting ready for some drifting practise and I feel if things on the car are against the fact that I want to be losing traction, something's going to break........... quickly

I've heard bad things (or is that, good things?) about the torsen diff saing that it gives good grip if one wheel loses traction, or hits a bump etc etc, so I if this is the case then surely the altezza aint going to be great at slip sliding <_<

Anyone from here in contact with the Japanese ADC ppl?

Also what diff would be recommended? Make, part numbers etc? CUSCO 2 way? 1.5 way? TRD? weld it up? :blink:

cheers

Yeah, chassis plate, the one on the firewall...

Just to elaborate:

A01A - 3.916 ratio Open Centre
A01B - 3.916 ratio Torsen LSD
A02A - 4.083 ratio Open Centre
A02B - 4.083 ratio Torsen LSD

So the 'B' denotes LSD.

...and here's a couple of worthwhile links:

The T-2 Torsen (type B) (the one that's in the Altezza)

Good ol' nice and simple HowStuffWorks.com (did you know the hummer uses Torsen?...)

There's a TRD LSD, right? So what's so special about the TRD 'sport' LSD?

Thanks for all the info there. i will check but I guess it will be a torsen one.

Thanks for the links to the altezza specfic diff, it seems a really good diff for providing grip however I think this will be a problem for drifting.

So does anyone know what the altezza drift club members use diff wise?

I know alot have gone for forced induction route but there is a white altezza with c-west kit that has gone na route and does some nice dori, so Im thinking power would'nt be an issue but would help.......

"Anyone from here in contact with the Japanese ADC ppl?"

I have contact with one, he drives the Blue Blitz SC car, I think he has blew the standard diff already.

Well, mine has the lsd, will see how it goes at the drags on wednesday night, running over double the power, hopefully she holds up.

All the Z and L edition Altezzas have the Torsen.

..... Unless they are 5AT :(

The BLue Blitz one is niiiiiiiiiiice.......

So you say he has blown the std diff? So can you find out what he's using now?

So what sort of diff arrangement do most ADC members use? I'm guess that some are still using the standard torsen for drift use or is that not right?

I'm just trying to findout if its worth letting the tezza out for some dori action now or get an aftermarket diff first.............

Thanks!!

you dont have the guys emaila ddy do you :P

Old post i know but .... I have an RS Altezza Tiptronic Z edition and i just checked the VIN plate and it states = A01B

So does that mean i have a LSD after all.... Have always suspected it but hard to test with an auto...


Thanks for any replies.......

Noel

( would be great if my auto has it, just for gloating alone.... :P )

yup that is the 3.916ratio trosen LSD.

to test your lsd (hehehehe this is where the fun is), make sure its not on snow mode or anything but on power, stick the car in drive, left foot lightly on the brake, and right foot on the gas, just hold the brake enough to hold the front wheels in place and the rear wheels should smoke up.
then release the brake and there should be two black lines :P

TEST DONE:P (but always retest to ensure correct results hahaha:P)

Nick

Great :woot:

I'll go and test it in the morning... before i start gloating..... :P

I had tried it on a few slippery surfaces ie ... sand and gravel and she dose dig nice even holes before pulling away.... but i had not thought about holding it back with the brake......

Thanks for the reply :)

put the car up on jacks so both rears are in the air. Turn one wheel one way, and the other wheel should turn the other way. - that is generally how you test weather you have an LSD or weather or not your LSD has blown!

not sure if it works for torsen, but it should...

Nope, that shouldn't work with the torsen diff unless it is preloaded (Like the T-2R). And since the Altezza has the T-2 when there is zero torque on one wheel, there is nothing to multiply across to the other so it acts like an open diff.

All the info can be found in the site I link to in my post above from last year. :)

Specifically, What happens when I have a wheel in the air?

@ Jasestu,

thanks for all the great info..... :)


Hope you don't mind but i put some of your info on the Uk LOC as i was asking about LSD on an Auto before and told " Auto's don't have it".... so it's great to have actual data to clear it up.......


cheers

Noel

U-turns on gravel roads are always a good test too. The back should step around nice and quick :woot: :lol:
What year is your car Noel? Mine's a 99 so had the A01A originally (but I've since fitted an A01B). I didn't know any 5ATs came with the B diff factory fitted, but I guess it could ahve been an option.

Cheers
David

Mines a 2000.....

Oh the back steps out very quick.... any junction wet or dry , no gravel needed ... which is great ( wife dosen't like though), :D

you're right it wasn't standard on the Z auto's and neither was traction control.....thankfully the orinigal owner picked the right options..... :)

Have a look here..RS200 - standard and options sheet
B)

Glad i got a Z and not a stardard tipronic as that seems to get nothing extra.... :o

Yaaaa... it worked...... my first No. 11...... :D


must have been at least a foot long.... :lol:


now i have to save for new tyres :woot:

hay im afta a 3.72 diff know of any

Wooo..! That's a nice tall one. Good for 300kph in 6th... :lol:

I'd like the revs to be 500rpm lower at 110kph. I always feel the ratio is too short compared to older cars like the Datsun 1600 with its 3.7:1

Where was a 3.72 used?

It wont be for a 6 speed it be for a 5 speed box going 2 have 2 change my gearbox :P they are in the altezza wagons

Sounds like you got some plans 4tezn aye jase?
:lol:

I do if things go 2 plan im said 2 say the 6 speed wont be up to the job :(

im a little confused about the diff ratios listed. on the TRD site they only list a 4.10 and a 4.30 gear as original gears, can anyone clarify? It also lists the 5AT as having the 4.30. I ask cause i can put my hand on a 5AT diff and need to know if i should bother.


I believe the manual has the numerically highest ratio and the sporty auto (5AT)has the numerically lowest. The manual is undergeared IMO, running too many revs at 100kph. I'd like to replace it with the 5AT and drop the revs.

In contrast, my Datsun 1600 runs a 3.7:1....

keith

For a standard appliation - the standard torsen is a very reasonable item! It locks up really nice, It can take massive amounts of abuse and still keep kicking!

I too would like to be doing a few less RPM 6th. Changing that last ratio in the gearbox would be nice, but unlikely to be a do-able at a reasonable price.

I have done some looking around and did come across a reference to a diff ratio of 3.73:1 for the IS300 (looked like the 3L engine in the IS200 bodyshell). For the 6MT that would be about 2,750 rpm for 100 kmh in 6th, that should be pretty nice except for overtaking.

Some additional questions for the thread:
- Does anybody know if bits (and diff in particular) would be available in NZ from the IS300?

- If so, would the diff be a straight swap?

- Does changing the diff ratio mess up the speedo or traction control?

- My 2001 RS200Z, has a diff code of A03B, what ratio is that?

- What diff ratios are used in the Gita's?

http://forum.altezzaclub.org.au/index.php?showtopic=3464

from what i've found out the Auto and Manual had a final drive of 4.1 up until mid 2001, then the Manual was changed to 4.3....

As stated in the link above the IS300 does have a lower drive ratio but will not fit

Thanks for that thread Noel, I take it from that thread that we are talking about F series Diffs and possibility of buying a new crownwheel/pinion combos from Toyota.

From another reference on F series diffs, I understand that the following crown wheel / pinion combos are out there.

41/10 (4.1)
41/11 (3.73)
41/12 (3.42)

43/10 (4.3)
43/11 (3.91)
43/12 (3.58)

Can anyone confirm that these ratios are available and can be installed into an Altezza Diff? Could it be that simple?

it is known that the altezza 7.5" crown n pinion gears + lsd will fit in the f series heads. i have done this myself. should see no reason it shouldnt go the other way too.
trd list the same lsd part number for altezza as ma61, ta63, gx61, mx73 etc

the more common F series off the top of my head... rounded to one decimal place
Ratio / Code / sources
3.7 F30# (ma61 celica-supra has it)
3.9 F30# (common)
4.1 F29# (common gx61, gx71, ta63)
4.3 F28# (estima van)
4.6 F25# (cr30 4wd Liteace van rear diff)
4.8 F36# (ms112 Crown)

My 2002 Altezza RS200-Z has the code 'A03B', is that a 4.3 ?

torsen lsd is ok, but if you're sideways and one wheel comes up in the air you're farked

especially when the road is not smooth and consistent, and especially on tight uphill corners when the car tends to lift an inside wheel (maqurie pass) the diff will unlock, and if you're sideways when it suddenly locks again its hello guard rail or cliff face.

Mechanical 1 way (2 way for high power applications) for the win.

I'd love to change my diff to about 3.5:1 ratio. The taller ratio makes the turbo pull much harder.
The IS300 diff doesn't fit - you also need the diff carrier and axles as well as they are all different.
If the F series parts fitted I could use them - has anyone done one for sure?

graham any f series crown wheel and pinion will fit into a is200 not sure of the is300 thou ,from live axle to irs

TRD list-

SXE10 6spd Oct '98-May '01 4.100
SXE10 6spd May '01 onwards 4.300
SXE10 5A/T 4.300
GXE10 6spd 4.300
GXE10 4A/T 4.300

http://www.trdparts.jp/english/list_race-mis_sxe.html

Hi Guys,

Rekindling an old topic, but I'm keen to find out the source of these numbers:

Looking at the Japanese EPC there is only 4.300 and 4.100 available for the GXE10 and SXE10 (and JCE15 - JCE10 is 3.727 and 3.769).
The EPC is similar to the TRD list but not exactly the same.

I'll try to get my hands on some info off the Lexus EPC because I need to find out for sure what my diff ratio is, and I no longer trust the numbers published on the net.
I'll resort to counting teeth if I have to, but I'd rather not :P

Mos.

Having spoken to Parra Lexus here's some info:
Auto: 41201-80145 41:10=4.100
Manual: 41201-29576 43:11=3.909
These ratios are across all model years of Aus IS200 according to the person I spoke to.
The non-LSD hemisphere/case is 41311-22060 which is the same as the Japanese GXE10.
Note that these were communicated over the phone, and I have not observed them on the EPC first hand.

I'll be trying to get my hands on a manual LSD as I think it will be a worthwhile compromise of not having to do too much, getting an LSD and achieving a taller ratio.

I intend to disassemble my original diff to confirm crown wheel and pinion from cars like the MA61 (3.727) or AA63 (4.556) can be used.

Mos.

If you need you can email me your chassis number and I can check to see what diff you have for you.

There are quiet a few more options for the ratios eh, just at a quick glance I can see about 5 in total.

Looks likes the only ones that came with an LSD are:
43:12=3.583 and
43:11=3.909

That is for an IS200 though, the Altezza AS200 has different options again for the diff and ratios..

I've got a 4.3 ratio diff i want to put into my altezza.
I've currently got a 4.1 .
For the speedo, Do i need to get a '01+ speed sensor from a gearbox? Is there any other way to get it reading correctly? (Bear in mind i have PowerFC and that shows true speed, calibrating the speedo wont do).

Cheers, Mike

According to the computer no you should be ok as all SXE10s used the same speedo sensor, weather they were 1998 or 2005 and with different diffr ratios too even

Folks,
Can anybody tell me what is the ratio for AO3B axle. Is it 4.300?
If so does this mean only 6MT come with AO3B.

Chassis Code : SXE10-AEFVF-R
Manufacture : Sep 2002
Transmission : 6MT
Transmission Code : J160
Axle : A03B