Torsen or not?????

[jzed ay]

My car is up on the stands at the mo getting a service.92 jza70 blmvz
Is there any way of being able to tell if the the diff is a Torsen or weather its just the stock diff?

I have been told by previous owner that it is, and then told by some one that the model that i have got did not come with one standard. Any help with this would be much appreciated. Cheers. Tim
(yes i know fu@k all about cars..but learning)

[Norbie]

The JZA70 came with a torsen LSD standard. But the way to confirm is to look at your build plate inside the engine bay. If the axle code ends with a 9, you have a torsen.

[jzed ay]

Tks Norbie i shall check it out.

[jzed ay]

Code is r154 g294. so no torsen for me. unless it has been changed. Right

[brett_celicacoupe]

could have been changed, but more likely its still got the 4pinion clutch type LSD in there (code G_ _4).

i have had a G series 4pinion clutch type LSD beside a G series torsen type LSD and the clutch type requires a decent amount of effort to turn the axles against each other. but the torsen spins freely like a open centre

[mullett]

Easy way to tell: Select a nice, open peice of bitumen. Select 1st gear. Dial up 5000+ RPM, wheel turned to full lock. Sidestep clutch. If it goes halfway around then tries to push straight, you've got a torsen. If it just pushes straight, you've got an open diff. If the car dissapears into clouds of smoke and spins around its axis, you've got an aftermarket LSD.

Worked for me

RM

[JustCallMeOrlando]

If I've got on full lock, the car would be quite happy to disappear into clouds of smoke, and I have a Torsen...

[Norbie]

could have been changed, but more likely its still got the 4pinion clutch type LSD in there (code G_ _4).

Actually the 4 means 4-pinion open centre... no LSD at all. I'm surprised a JZA70 came out like this - is it an actual JZA70 though, or another model with a 1JZ conversion?

[MR 1JZ]

well the code indicates it came with an R154 which means it had to be at least an MA70 w 7MGTE and most of them came with LSD...

but yes it is quite odd...

[brett_celicacoupe]

Actually the 4 means 4-pinion open centre... no LSD at all. I'm surprised a JZA70 came out like this - is it an actual JZA70 though, or another model with a 1JZ conversion?

sorry i meant 5

[urantia]

I had a 7mgte/auto ma70 with an open diff stock. Was sure all turbo versions had the LSD.

[lumpy]

Code is r154 g294. so no torsen for me. unless it has been changed. Right

Are you sure that 4 isn't another 9? Which would make sense if a real jza70.

[Mr Revhead]

toyota use 2,3,4,5 for diff codes...
2 = 2 pinion open
3= 2 piniion lsd
4= 4 pinnion open
5= 4 pinion lsd.

the exception is FWD which at some point used letters.
a= open
c= lsd

[Norbie]

Correct but incomplete; they also use 9 for torsen centres.

This only applies up to the 80's though, from the early 90's they switched to a completely new coding system.

[jzed ay]

Defenatly factory 9/92 jza70. Some diff info from todd here if interested. I'll just have to put it to the test. Build plate sez open so i rekon the guy i bought it off is telling porkies.