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Discussion Starter · #1 ·
I'm doing a trany flush at 38k on my 2002 Tundra, Ive been reading a lot, and decided to do it myself, I'm trying to justify using synthetic over conventional fluids, synthetic is way more than conventional, is it just a feel good thing will it make any difference they claim it lasts longer. At $7 per qt for Mobile 1 times 16 =$112 vs $25 to $30 at Sam's club for the reg stuff its Generic. Even name brands Pennzoil ATF is around $40 for 16 qts.

The Tundra takes 16 qts to do a flush.
1. Mobile 1 $7
2. Amsoil $10.99
3. Royal purple $9.99 JCWhitney
4. Red line $10.95 amazon price

What to do, suggestions.
 

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The transmission is a weakness for our vintage Tundras. I have been doing a drain-and-fill with Mobil 1 every 15-20k miles. The fluid should be much more resistant to high temperature oxidation and varnishing up. I feel it is good insurance to use a good fluid. The money is peanuts when considered over the life of the vehicle.
 

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If ur vehicle is speced for DexronIII, then any Multi-Vehicle ATF would be step up. On my maxima, it is speced for DexronIII and I am presently running Mercon V and I must say there is a world of difference between Dexron/Mercon vs MerconV.

If you have deep pockets go for syn, Mobil1 is now a Multi-Vehicle ATF and it is a good choice. Amsoil is another favourite.

BTW, does ur tranny hold 16Q, check it may just be 12Q.
 

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Discussion Starter · #4 ·
I'm going by whats been posted for the quantity of fluid, my Haynes manual wont say they list 1.7 qts for 2wd no way that can be right even for just the sump sounds low.
 

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I did the switch a few years ago. I used Redline and rented a special
machine that used the transmission cooler lines to drain and fill
simultaneously. I got my money's worth. I get better heat protection,
crisper shifts when cold, and no tranny problems from a first year first
gen Tundra. My transmission gets a fair amount of abuse from
towing and running a supercharger and has been rock solid. Another
"upgrade" I recommend is a tranny cooler with a dedicated fan like
the Sequoia, it really helps to keep the temps in the green on those
long grades when hauling or pulling.

dogger
 

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I did the Mobil1 flush in the 20's.
Truck just turned 89k.
I usually drain and refill spring and fall.
It is stock.
Ocasional heavy load.
I noticed it shifted smoother.
I do long trips so the higher heat resistance is a plus.
The cheapest price I found this spring was $5-6 qt at Walmart.
 

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I am having the same issue, i have 77k on my truck tho have been doing the drain and fill for about every 2 oil changes, i want to run full syn now you just now its better. But i have 77k on the truck tho so i was just thinking to my self hmm... But i say go for the full syn it would be the best. Sure you can go longer on the changes but i say still change it ever 10k drain and fill. But its just an idea. ... Better to spend $20 on a drain and fill then 2k on a new tranny
 

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About every 3rd or 4th oil change I do the mini-change. i.e. the 3 quart Mobil 1 ATF change... I now have 166,000 trouble free miles and the transmission is as new shift-wise.. And yes, Mobil 1 provides for a cooler running transmission, no oxidation, etc.. Highly recommend even the mini change.. It works......... And I regularly pull a Ski Nautique boat, am off-road in coal mines in my work, etc. so it has not been easy highway miles.
George Morrison, STLE CLS
 

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Discussion Starter · #9 ·
About every 3rd or 4th oil change I do the mini-change. i.e. the 3 quart Mobil 1 ATF change... I now have 166,000 trouble free miles and the transmission is as new shift-wise.. And yes, Mobil 1 provides for a cooler running transmission, no oxidation, etc.. Highly recommend even the mini change.. It works......... And I regularly pull a Ski Nautique boat, am off-road in coal mines in my work, etc. so it has not been easy highway miles.
George Morrison, STLE CLS
Thanks thats what I like to hear :tu: I don't tow but I do give it hell :devil: any chance I can.
 

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Try looking for a local ExxonMobil distributor. You might get a better rate buying in bulk. There is a locator on their website.
 

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Discussion Starter · #11 ·
Just did the Mobile 1 atf flush 16 qts. It went easy the last 3 qts were pretty clear. I had to go to three walmarts to get 16 qts for $5.92 each

Call me cheap but I kept the last four qts that came out of the Tundra, reason the fluid in the Tundra was very clean with 38k miles, and the last four were a mix of new synthetic and old very clean fluid, I used them as part of an 18 qt flush on the Jeep my son owns, I used reg atf on it, the Jeeps fluid looked black like used motor oil, it dates to 1993 eek..

Anyway, the transmission runs great, only one thing I notice it shifts smoother or is it slipping? Could it be the friction modifiers in the mobile? Is this how they make it run cooler, all I know is it shifts smoother feels like it slips, before it engaged solid sometimes with a bang it always ran like that when new, I never liked that about this truck.

Now its smooth shifting like a GM transmission, you cant hardly feel the shifts well worth the trouble and $.
 

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Yes the smooth is nice I changed over at 30k and it's like butta...butta. Mobil 1 multi vehicle ATF is magic.
 

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I did a full flush with 16 quarts of Mobil 1 Synthetic ATF at 37K miles ( 2002 Sequoia). Today at 81K miles I did a simple drain and refill with Mobil 1 ATF.

My other vehicle is a 1995 Volvo 850 Turbo with 119K miles. The tranny is a known weak leak on this high horsepower Volvo (300HP modified) - mine is all original.

Always flush with Mobil 1 ATF - seems to keep it running like new . My Volvo specialist mechanic will only use Mobil 1 ATF.

But then I guess I am partial - I have been using only Mobil 1 synthetic products in my cars since 1988.:) The stuff is cheap versus the alternative - and I maintain and generally keep my cars many years.
 

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I'm doing a trany flush at 38k on my 2002 Tundra, Ive been reading a lot, and decided to do it myself, I'm trying to justify using synthetic over conventional fluids, synthetic is way more than conventional, is it just a feel good thing will it make any difference they claim it lasts longer. At $7 per qt for Mobile 1 times 16 =$112 vs $25 to $30 at Sam's club for the reg stuff its Generic. Even name brands Pennzoil ATF is around $40 for 16 qts.

The Tundra takes 16 qts to do a flush.
1. Mobile 1 $7
2. Amsoil $10.99
3. Royal purple $9.99 JCWhitney
4. Red line $10.95 amazon price

What to do, suggestions.
FWIW, BimmerWorld - Race Proven BMW Performance Parts and OEM Parts has Redline D4 ATF for $8.55/qt if you buy 12 or more qts. I use Redline in both of my BMWs (one is a 165k mi heavily tracked 88 M3), but decided on the Mobil 1 for the Tundra due to the mantra that some people have when they hear the words "Redline fluids."
 
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