There are a # of ways which you can tell if your car has a VLSD transmission.
1)Tranny code on the VIN plate.If it list the tranny code pictured Below then you have a VLSD.
2)If your drivers side axle seals looks like the one pictured below. VLSD trannies have a much larger drivers side axle seal than Open differential trannies.
3)You can also follow the check outline in the FSM.
This is what the VLSD drivers side Axle seal looks like.
POSTS FROM OTHER USERS:
It is not really clear in the photograph of the FSM above, but the transmission MUST BE IN NEUTRAL to perform this check.
If the transmission is in gear, the wheels will turn in opposite directions regardless of what type of differential you have..
and all I30T's have the VLSD tranny, both in automatic and manual transmissions.

FSM, pdf format. everybody should have it
Jae
Quote:
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Originally Posted by C3nthusiast
I have a 1999 Max with Traction Control. Does that have anything to to with having a VLSD? Someone told me I did.
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TC is not the same as VLSD. VLSD id mechanical (based on fluid). TC is electronically-controlled.