IS DEXRON III COMPATIBLE WITH T-IV TRANS FLUID???

have a recient bought 2003 AC 4X2 Tundra,want to drain and fill trans pan,are these fluids compatible?

 

No

 

have dealer paperwork 4 a trans flush in 08 at 60K ,now at 126K want to drain and fill,or should I leave it alone and drive on??I saw a thread on this board in 2003 toyota went to T-IV fluid,dealer paperwork says ATFB whatever that means????Thoughts???

 

ATF bulk. I think your ? key might be sticking...

 

contact the dealer

 

i am in cincy, they r in evansville ind.they cant help 4 info B 4 2019

 

any sugestions from the board members? THANKS TO ALL!

 

Courtesy of @bfunke via Toyota's own TSB, NO they are not compatible in Toyota's eyes if we go by their TSB.
'00-'02 uses Dex3 (or higher, All DEX fluids are reverse-compatible).
'03-'04 uses T-IV.
'05-'06 uses WS.
Stick with what Toyota recommends.

 

so I am hopeing in 2008 the dealer used type T-IV 4 the FLUSH........

 

Rock Auto has Aisin T-IV for nearly as cheap as the universal Dex IIIs

 

No need to scream using all caps on your title.

 

Thanks 4 the tip....

 

He did get our attention.

 

would u as the owner ,go ahead and drain and fill with T-IV not knowng 100% certain what is in the tranny now? THANKS

 

If it's running fine today, yes.

But if you're really that concerned, and you - being in Ohio - are confident your frame is actually intact and in good shape, which is rare for rust belt trucks, then you may want to find a BG "gold" level shop (locator here) and have them do a full BG transmission treatment. Not only will BG fully warranty the transmission for a period of time after treatment (years, but I forget how many), but their fluids exceed Toyota spec, and contains additive packages that (supposedly) has been shown to prolong the lifespan of the transmissions Toyota used in their trucks and SUVs. At least it's the case for my sealed 5spd.

 

I appreciate your suggestion,Thanks shifty!

 

NP.

And if you haven't already, do yourself a favor, read this: https://www.tundras.com/threads/so-you-wanna-buy-just-bought-a-1st-gen-tundra-eh.115928/

 

went thru my approx. 300 page 2003 Tundra owners manual today,on page 297 transmission fluid only T-IV,Thanks to all the board members!

 

One option for you to consider is disconnecting a cooler line and catching the old fluid and every couple quarts replacing an equal amount. Do that with until the fluid looks new. Then set the level correctly. Someone recently did that but it might have been in one of the other Gens threads.

 

on the trans cooler (radiator) is the line on the drivers side, the inlet side frm the trans?