darksider

one of my friends is in japan and i asked him to get me an LSD for my 90 gxl none LSD. which one of these lsd's are compatible?

some of them might be a mazdaspeed aftermarket 1.5/2 way but he said if the orignal lsd from the exact car worked for the rx7 then he dont see why an after market for the same exact car wouldnt. he said they had, dont quote me. i dont know what these cars are.

x2 323 lsd, if they fit what year?
x2 93 miata lds, i hear this one will fit.
x2 BG8Z 1.6L miata lsd, this one might be aftermarket, if they fit what year?

if none fits can someone specify a unit that will. im looking to just change the pumpkin or LSD unit itself. not a full drivetrain swap.

thanks

darksider

well i guess the only way it would work is if its a 4.3? that way i can swap everthing to the lsd unit correct?

also one of the miata lsd said 90-94. i thought 94 was the start of a new generation? in the thread for the torsen lsd swap he said 94+ lsd from miata would work. my friend said the 90+ is the same as the 94. WFT?

thanks for looking.

Icemark

The 94+ Miata would fit fine (and there have been several people here to swap the Miata Torsen into a non turbo differential. You need a 7 inch gear set differential. The 323 is normally a FWD car, so unless it is the limited edtion 4WD version (GTX) there is no way the differential would work. And it is my understanding (and I may be wrong) that the 89-93 Miata used a 6 inch differntial.

But you do know that the gearing would not be compatible. Just the differential itself. So I am not sure what you are asking about the 4.3.

Swapping in a Miata differential would require you to dis-assemble the existing rear end, remove the differential from the case, remove the gear set, put the gear set on the new differential, re-install the new miata diff, set pre-load on the pinion, and re-asssmble the housings, then re-install the rear end.

darksider

thanks for the reply.

so none of them work? what about the BG8Z 1.6L miata lsd? what year did this come off of?

thanks again

Icemark

No, you would need the 1.8 rear end, again it is my understanding that the 1.6 used the 6 in diff

darksider

my friend also said he the guy at the shop sold a BG8Z 1.6L miata lsd to an owner of a 96 miata and it work out ok for him. ??? im guessing hes trying to make a sale.

is the bg8z the stock motor for pervious 93 miatas?

thanks

Icemark

Well go post on the Miata boards, and ask. They would know for sure.

Like I said, I don't know for sure

kungfuroy

iTrader: (6)

Icemark is correct
Pre 93 Miatas were 6" open or VSLD units
After 94 they were 7" open or torsen units

The 'upgrade' you would have to do is exactly what Icemark said, swap out the center chunk from a 94+ torsen into your open diff assembly.

darksider

is there a way to tell the difference from a VLSD and a TORSEN visually? also how would i measure it to make sure its 7"?

RETed

Why do you need to go to Japan to get an LSD?


-Ted

kungfuroy

iTrader: (6)

the vlsd wont fit so get that out of your head.
The torsen came on the miatas after 94. If you are just buying the chunk, the torsens are easy to spot becuase you can see the worm gears. If you are buying a whole diff assembley dropped out of a miata, the only way to tell is looking at the pinion flange and knowing the difference between an open versus a torsen.

CrypticApathy

Why dont you just buy a rx7 diffrential?

darksider

buying from japan because its way cheaper. i know a VLSD wont work, i just wanted to know the physical difference so i can describe it to my friend to make sure its the right one. they dont have any rx7 diff, plus the clutch types might be worn out by now.

how would i measure to achieve 7"? from dead top to dead bottom?

so you are saying if its a4WD diff it WILL work?

thanks for the replies.