[MR2] More Tranny Oil Stuff
kblake at royalmoore.com
Fri Apr 10 14:24:23 EDT 2009
A couple of points.
1) Toyota variously recommended GL-3, GL-4, or GL-5 at various times, in various documents:
2) Kris is one of the most ham-fisted shifters I have ever ridden with. He's famous with everyone who has ridden with him for
shifting hard. The shifter cable he broke was actually on the road course in Vegas, at the SW2003 MR2/All Trac meet. (not drag
He was using a borrowed E153 from John Santesson's 91T. Prior to Kris borrowing the tranny, it shifted perfectly (for a 91-92
transmission). Afterward it did not. That is when Kris purchased a new 93+ with LSD transmission, which he also proceeded to
wreck with his shifting technique.
3)I exclusively used MT-90, and later Pennzoil Synchromesh in Deuce Coupe's (original) 93 tranny. I owned the car for 6 years,
during which time I put about 60k miles on the car at power levels from stock to 390RWHP. The car shifted as well the day I
sold it as it did when I bought it with 45k garage-queen miles on it.
In short, I would not base my transmission oil decisions on his anecdotal evidence.
Royal Moore Toyota Parts
Direct: (503) 693-6893
kblake at royalmoore.com
20% off list price on Toyota and TRD parts, free shipping, and no sales tax.
No pre-pay requirement for special orders. You pay the day you get your tracking number.
From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On Behalf Of James
Sent: Friday, April 10, 2009 9:52 AM
To: mr2 at mr2.com
Subject: [MR2] More Tranny Oil Stuff
For what it's worth, when I first bought my '93 Turbo I researched engine and gear oil pretty thoroughly before deciding on
what to use, and finally settled on Mobil One Synthetic engine oil, and Royal Purple Gear Oil.
Royal Purple is API GL5 rated, and I believe that Redline is not. Toyota specifies API GL5.
The following is from Kris Osheim of KO Racing. He makes a pretty convincing argument, and that's what convinced me to use
"This is my input on the gear oil for the MR2 Turbo E153: I've used Redline, Synchromesh, conventional, Valvoline, and Royal
purple. Of all the fluids listed, only Royal Purple is API GL5 rated. I believe there is a reason that in the owner's manual
for my car it lists using an API GL5 fluid in the transaxle. It has a higher shock load, and shear resistance.
I purchased the transmission for Loki new from Toyota in 2004. I rebuilt the transmission in 2007 to find out that I had worn
down 3 of the first
4 gears. I also found out that the new transmissions from Toyota don't have a dual cone synchro on 3rd gear (which was the
worst shifting gear prior to rebuilding -- it would NOT go in without significant force and rev matching, and I actually broke
a shifter cable drag racing it this way). In the process of doing my rebuild, I modified a gear on my mill, and ordered the
correct dual cone synchro pieces to repair the transmission. I've also rebuilt several other transmissions locally that
appear to have experiences excessive wear in the last few years who were running synchromesh and redline fluids. I can't
conclude that it was indeed the gear oil that lead to the wear on the gears I've seen, or if it is simply an age issue, but as
Toyota specifies GL5, that's all I will put in a car any more, and I only personally use the Royal Purple Max Gear synthetic."
> We kinda got off on motor oils here; this is for the transmissions,
> and I have decided on Redline MT90 for both cars. What I was asking
> was where to buy. I am in the middle of nowhere in Mississippi, so
> I'll have to order it online.
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