Rear Differential & Transfer Case - Page 2

chenxingha · 05-14-07, 02:31 PM

Thanks, Lexmex. Yes, it is.

Now it explains the following: I drained the ATF through the drain hole on with the transmission pan and replaced the fluid with Toyota ATF Type T-IV from my local Toyota dealer (4 Qt., $5/pQ) two weeks ago, not knowing there is another box needs to be dained. The old ATF was black and thick. I was so glad that I changed the ATF. But a week after the change I checked the level, only to find the new ATF is dark again, with about 50 miles of driving. I was puzzled. Now this second drain plug at the front explains it all. I will do another ATF change next week - this time taking off both drain plugs!

Many thanks,

wing0 · 05-14-07, 03:03 PM

You'd have to do a drain and fill around 3-4 times in a roll just to get most of the old fluid out. You can't expect to get ur fluid back to cherry red just by doing the front diff too..

Gomer1 · 05-14-07, 05:47 PM

what he said. you will need to do it a few times (3-4)
I just did it a couple of weeks ago, and i will be doing it three more times when i drain the oil.

Lexmex · 06-11-07, 07:26 AM

shawnst, it does use metric. I have run into the same issue where I pick up an english system tool and it doesn't quite fit.

shawnst · 06-11-07, 11:00 AM

Thanks .. I will try 24mm.

Lexmex · 06-12-07, 09:46 PM

Quote:

Originally Posted by shawnst

Thanks .. I will try 24mm.

When you get it off let me know if you have a lot of accumulation on the rear differential drain plug and an awful smell from the old fluid on the transfer cases.

shawnst · 07-18-07, 07:21 AM

Quote:

Originally Posted by Lexmex

When you get it off let me know if you have a lot of accumulation on the rear differential drain plug and an awful smell from the old fluid on the transfer cases.

I know I still owe you this, Lexmex. That drain plug is too low profile and not being able to jack the car up, I really don't have much space to work with. I was afraid to strip the plugs, so I decided to have a shop do it. From about 20 feet away, the drained oil looked dirty. I believe the oil would smell bad although I wasn't close enough to tell. After the front transfer case oil change, the car does feel lighter for about 5 mins. And then it went back to the feel of same daily driving.

Lexmex · 07-18-07, 08:07 AM

Quote:

Originally Posted by shawnst

I know I still owe you this, Lexmex. That drain plug is too low profile and not being able to jack the car up, I really don't have much space to work with. I was afraid to strip the plugs, so I decided to have a shop do it. From about 20 feet away, the drained oil looked dirty. I believe the oil would smell bad although I wasn't close enough to tell. After the front transfer case oil change, the car does feel lighter for about 5 mins. And then it went back to the feel of same daily driving.

The transfer fluid is the one that usually smells bad. Some members over in the GS forums were confirming much the same, but of course the accumulation usually occurs on the rear. The good thing is that it has been changed out.

This past Saturday I attempted to deal with my little leak on my transfer case. Not much had gone out (it is a leak on the top), but I having no more Royal Purple (they make you buy the whole case here) I went over to BMW to get some of their synthetic 75W-140 differential fluid (Toyota has non-synthetic). Higher weight which can help in a seal leak and added what I could in there and my uncle took his hand and added some sealant he uses to seal engine blocks/transmissions. So far no leaks.

edbro · 06-13-07, 07:40 AM

Edit: Disregard

edbro · 06-13-07, 10:17 AM

If the reservoir directly behind the transmission fluid pan is correctly called the front differential, why does the chart show that it hold gear oil? We've been saying that it is interconnected with the transmission and drains transmission fluid.

Lexmex · 06-13-07, 10:29 AM

Quote:

Originally Posted by edbro

If the reservoir directly behind the transmission fluid pan is correctly called the front differential, why does the chart show that it hold gear oil? We've been saying that it is interconnected with the transmission and drains transmission fluid.

I agree with you, this is strange and I never understood this misstatement. Both the front differential (the one behind the tranny pan) and the transmission both use Type-IV ATF, not gear oil.

However, the transfer case for those of you with AWD shows transfer oil on its fill plug, and this without a doubt uses 75W90

Meetya · 06-13-07, 10:46 AM

Quote:

Originally Posted by Lexmex

I agree with you, this is strange and I never understood this misstatement. Both the front differential (the one behind the tranny pan) and the transmission both use Type-IV ATF, not gear oil.

However, the transfer case for those of you with AWD shows transfer oil on its fill plug, and this without a doubt uses 75W90

I know this is strange. I agree with you, front differential should use ATF, since it shares it with transaxle, not 75w90. It is another mistake in Lexus specs.

Lexmex · 06-13-07, 10:56 AM

Quote:

Originally Posted by Meetya

I know this is strange. I agree with you, front differential should use ATF, since it shares it with transaxle, not 75w90. It is another mistake in Lexus specs.

I have the 99 manual, and have been looking at scans from a later RX300 manual and have been finding all sorts of goofs. One of the biggies was the misplacement of the Bank 1 and Bank 2 A/F sensors and some terrible diagrams of coolant drain plugs. Yeah, that one you found with the MAF sensor and oil pump was priceless.

Meetya · 06-13-07, 05:48 PM

Quote:

Originally Posted by Lexmex

I have the 99 manual, and have been looking at scans from a later RX300 manual and have been finding all sorts of goofs. One of the biggies was the misplacement of the Bank 1 and Bank 2 A/F sensors and some terrible diagrams of coolant drain plugs. Yeah, that one you found with the MAF sensor and oil pump was priceless.

I just bought a new manifold from PPPP. It looks different. Heavier and has multiple layers of grid metal inside (for burn canalization, heat or sound suspension?). I will post photos of it installed. Also, thinking of welding the old one and selling it for $50.
PS: I so regret I did not have my camera with me when mechanics showed me the engine with head covers removed. I have seen my cams. Everything is so clean and sparky now... Btw, they are replacing two cams with OEM because aftermarket ones are causing timing lags. I think it was you who said there are no aftermaket cams for 1MZ. I guess there are, and they suck.

TunedRX300 · 06-13-07, 11:40 PM

Quote:

Originally Posted by Lexmex

I have the 99 manual, and have been looking at scans from a later RX300 manual and have been finding all sorts of goofs. One of the biggies was the misplacement of the Bank 1 and Bank 2 A/F sensors and some terrible diagrams of coolant drain plugs. Yeah, that one you found with the MAF sensor and oil pump was priceless.

Yes, I remember the 2nd coolant drain plug. I will replace my coolant soon and see whether that 2nd drain plug can release additional fluid inside the engine.