sktn77a

iTrader: (2)

Probably asked and answered in different posts before but the search function didn't answer my specific questions......

I need to change all of the fluids in my 1999 AWD RX300. Engine oil and transmission fluid, I get. Then I believe the front differential is part of the transmission and shares lubrication with the transmission? Then i gets a little blurry. Is the transfer case separate? What about the rear differential? What is the special "torque sensing LSD fluid" I need and where does that go? I'm not changing the fluids myself but I just want to make sure the independent I'm using knows the ins and outs of the RX300 transmission and drivetrain system.

Thanks,

salimshah

Partial answer:

The transmission fluid is one fluid (filled through dip-stick), and drains out at two locations ..1) transmission pan 2) front diff-hump (both being lowest points of the system and the full system drain can not happen as fluid is left in the torque converter. What you drain is essentially the sediments. Make sure Toyota type IV (better or equivalent is used and should not be confused with Dexron type IV). It will take you number of drain and fills to get close to 100% fresh. [IMHO not necessary as contamination does not happen].

Rear diff: I have FWD so my information is limited. Only advice I can give is ... the filler plug has a tendency to freeze. So make sure you can budge it before you open the drain plug.

Salim

hypervish

The transfer case is separate, and it takes gear fluid.

Also the rear differential is separate, and that too takes gear fluid. As far as the LSD fluid, it depends on whether or not you have the LSD. If you do have the LSD it has a special fluid with friction additives that goes through the same fill hole.

sktn77a

iTrader: (2)

Yes, I do have the LSD. I wasn't sure where the limited slip mechanicals were (front diff, transfer case, or rear diff) but it sounds like it's the rear diff.

Thanks.

hypervish

Yeah, the LSD is only for the rear differential.

You're welcome!

NyCrAzY

Also, I reccomend drain & fills only since flushing can lead to problems including the infamous 1st gen RX300 transmission failures.

sktn77a

iTrader: (2)

Yep, seen all the sob stories of folks' transmissions crapping out on them just after a flush!