Can anyone tell me if this is a USDM or JDM transmission? Did it come with a factory LSD? I can't check since it is installed on my vehicle. Thanks!

 

It could be either one. The Y21 was used in the 1994-1995 USDM Del Sol without LSD and also in the JDM B16 transmissions with Viscous 14 bolt LSD and without LSD. If you pull the axles and look inside you will see a diff pin for the open diff or straight through (no pin) for the LSD model.

 

Thanks for the info!