Toyota Tundra Forum

Working on 2000 4wd Tundra It has trany fluid getting into the radiator. Any idea how this could happen? It causes the overflow to run all over the front of truck. Had to add 3 qts trany fluid.

only tranny problem i ever ran into was on a drunken night in Thailand. Sorry i cant help

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Do you have a transmission cooler? Usually a transmission cooler uses the radiator for the cooling.

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Good Gawd Squid that is one ugly Tundra.

On the new Tundras, doesn't the truck use the engine coolant to warm up the 6 speed transmission fluid to operating temperature faster? Wonder if they did that in the 5 speed as well. A blown gasket maybe? Is there a gasket anywhere between the two fluids?

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Any questions about truck mods I have done need to be asked in the forums. Don't send me a private message about mods cause I probably won't answer that PM unless there is money involved.

2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, 3M clear bra, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI, Llumar tint, CompuStar Pro alarm, ProComp 6066 20" wheels, Cooper Zeon LTZ 275/60/20 tires, OME HD coilover lift, Firestone helper air bags, 55w reverse lights, stereo cable lock, Tekonsha P3 brake controller, colormatched exterior parts (de-chromed truck), eDead sound proofing, CDT Audio speakers, Custom made speaker brackets, Weathertech floor mats
All mod descriptions and pictures © 2007-2009 by Toxarch. They may be copied only for personal use and the mods may be done for non-profit only.

almost all automatic trans use the radiator as a cooler or in some cases a warmer . the rad, has a holding tank or tube or can for trans fluid . i think yours has sprung a leak inside the rad.You can go to a outside cooler cheaper than replacing the rad.just close off lines in the rad so anti freeze dosent leak out.

Sounds to me like a bad radiator. I am a toyota tech and im pretty sure that the cooler is built into the radiator on the 2000 models.

^^ What he said.... radiator likely has a leak between the tranny cooler portion and antifreeze/water portion.

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2007 Tundra Limited Double Cab 4x4 Super White
Volant CAI
Pioneer AVIC Z-2 (hard drive upgrade to AVIC Z-3)
Key FOB Tailgate Lock (courtesy of Toxarch)
OEM back-up camera w/flip down monitor microswitch mod
Sirius Satellite Radio
WeatherTech Floor Liners
20" OEM alloy wheels
Line-X Bed liner
UWS Black Powdercoat Low Profile Toolbox
DU-HA underseat storage unit
JC Whitney Black Nerf Bars
Lund Interceptor II Bug Shield
Tekonsha Voyager Brake Controller

I pretty sure they didn't do that on the 1st gen tundra...........I belive the only trans Warmer/ Cooler is in the 6 speed.....The 5 speed dosen't have it on the current 4.7...it is just a cooler.

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08 CrewMax, SR5, 5.7L, 4x4, OEM fog lights with ECU logic bypass, tow pakage,
ProCoat spray-in liner, low profile tool box, nerf bars,
2.5 inch Ready lift front level kit, 1 inch super lift rear blocks,
and BF Goodrich All-Terrains 305/65/18....Oh, a little skid plate trim too!

Slowhogg...............a.k.a. DEXTER, the CANADIAN RedNeck....