Really nobody knows? WIll it simply be stamped in a certain spot? On some kind of options sticker? When shopping for a used trans it shows these two different options. One is cheap, one is very expensive.
If it does not say on your driver side door, another way to tell is to actually go underneath the vehicle and count how many bolts are in the transmission pan. 18 bolts = U140E ,,, 17 bolts = A541E .
Be clear about this when ordering one, I did my research prior to ordering one, made sure I told them U140E, and they still shipped me the wrong one. It turned into a big hassle considering they supposedly record their conversations but lost mine. And shipping costs for a transmission can easily be $300 to $400.
If you call any Lexus dealer and give them your VIN number, they should be able to tell you over the phone. Your best bet is the parts department, not the service department.
I believe (but am not sure on that one), that the transmission that you have determines the type of transmission fluid that you MUST use. Either Dexron 3, or Toyota Type iV Transmission fluid. So its important to know what you got.
Okay bringing it back again. Transmission type. I have a 94 es300 yet i was told it has a 95 motor. Now i ned to replace transmission and IM at a lost to what it is and what to look for to go with motor. Help a DIY. In need.