RE: E58 LSD's - Definitive way to determine if LSD or not?

**PooJou** · 05-11-2007, 09:11 PM

Originally Posted by motormad

I dont want to disagree with anyone here, but i have 3 Honda, 1 Escort, 3 Toyota fwd transmissions kicking around my workshop and they all have crosspins except one which is a JDM Starlet turbo lsd box. With no driveshafts in you can clearly see right through the diff.

See that's the thing, The Witzl tried to figure out a definitive answer, and I'm fairly sure he couldn't figure the damn thing out either!!

I wonder if my mechanic knows, or if anyone at toyota knows....

**Mr Revhead** · 06-11-2007, 08:33 AM

so much mis info around i keep forgetting which it is! lol
however....
EPC shows a bar through the ae101.
the ae92 has a cross shaped spider with what appears to be a hole through it.
so i say:
all 101 GTZs had factory LSD. with bar
NO ae92 GTZs had factory LSD. no bar

ae101 is a viscous LSD. so when turning by hand it wont turn the other wheel the same way.

**quiksilv** · 16-08-2008, 06:15 PM

Another thread dig...

Ok I supposedly have an E58 gearbox. I recently picked up some AE101 driveshafts, and the splines fit in the box which is a start.

Now I can see straight through the diff and there is definitely no bar across it which should indicate non-LSD right? But with the gearbox out on the ground and the two shafts in either side, turning one shaft also turns the other - I sure hope its LSD!

**TERRA Operative** · 17-08-2008, 08:21 AM

Originally Posted by Mr Revhead

ae101 is a viscous LSD. so when turning by hand it wont turn the other wheel the same way.

Um, mine does..... ???

**quiksilv** · 17-08-2008, 02:32 PM

Seems there are so many combinations there doesn't seem to be a definitive way to tell. If only they just stamped something on the box that would make it a whole lot easier.

**Mitchee** · 19-08-2008, 06:01 PM

Originally Posted by TERRA Operative

Um, mine does..... ???

Mine does too. Up in the air, both wheels turn the same direction when turning one by hand.

Havnt had my shafts out to see the center, but i need new CVs soon so ill take a look when the time comes

**SillyCarS** · 19-08-2008, 06:05 PM

Originally Posted by quiksilv

Seems there are so many combinations there doesn't seem to be a definitive way to tell. If only they just stamped something on the box that would make it a whole lot easier.

how bout you jack the car up and pull it out!

just putting it out there

it would have been quicker than posting this thread up and waiting for a bunch of crappy replies

after checking the dates out i dare say he came to this conclusion anyways

**terryo** · 19-08-2008, 08:50 PM

All E code boxes except the 4wd versions, could be factory fitted with a viscous limited slip diff centre. If you look down the holes where the axles go, the VISCOUS LSD version can be identified by:
• A pin being seen that travels across the opening (rather than a disc occupying the entire hole. The axles bottom out on this pin
• 2 separated internal splines on the left -hand (long axle) side

All factory viscous LSD’s require special axles with longer splines on the double-spline side (short stub axle), and different sizes on the opposite side. The non LSD axles cannot be successfully modified. The factory LSD diff centre has a different speedo gear fitted to it and it won’t swap with non-LSD speedo gears.

Looking down thru the speedo gear hole wont tell you stuff-all, unless you know exactly what to look for. there are so many versions, that this method would be doubtful for an amatuer

The viscous LSD's dont always respond like plate type, where both wheels turn the same direction, by just turning one wheel

It is possible to fit an aftermarket plate-type LSD that uses standard (non LSD) axles. TRD however, offered a plate type LSD kit for open diffs, plus another version for replacing the factory LSD, so you did not have to swap axles. If you happen to get the rare TRD diff designed as a replacement for the factory LSD, then be aware it will require the long stub axle on one side, otherwise the stub will push in too far and the dust slinger on the stub axle will cut the oil seal.

**quiksilv** · 20-08-2008, 10:42 PM

Found some more info on another thread over at twincam, not sure how correct it is but might as well post it here...

AE101 gtz is a E58 box with a viscous LSD, this has a hex bar running through the centre, also another way to tell is look into the hole on the passengers side and you will see an extra spline seprate to the main spline to the diff, this drives the viscous.

AE92 gtz, early model didnt come with lsd, just a plain E58, late models some came with LSD these have a 5mm hole through the centre off the diff, the open diff has a 10mm hole. (these holes arent accurate measurements but you get the idea that open diff hole is much bigger than lsd)

E58 boxes can be identified with the black tin cover over 5th gear
E51 boxes have the cast alloy cover over 5th gear and the gears are 30% wider, therefore can handle alot more power, I had a E58 ae101 box and i stripped the gears!

Some ae92s came with the alloy end cover over 5th gear meaning they had the big gears.

AW11 gze came with E51 boxes, early model not being lsd and having a 10mm centra hole, late models some came with the TRD lsd which has a small 5mm hole through the centre of the off.

Some LSDs in all these boxes can have no hole at all, meaning this is a diff made by either Kazz or Cusco etc.

So the basic rules:
ae101 viscous E58- hex bar, extra spline
ae92 non lsd E58 - 10mm hole through centre
ae92 lsd E58 - Plate lsd 5mm hole through centre
aw11 gze non-lsd - big 10mm hole
aw11 gze E51 - plate lsd 5mm hole through centre
Anything with 5mm hole or no hole is LSD in all these boxes.
Cast alloy end cover means beefier gears over the tin cover.

The C series boxes from a n/a 4age has a hex bar through the middle like an ae101 E58 box, but this is not lsd!.