Tranny fluid temp light........................

DedDuck · #1 05-24-2005, 07:45 AM

Got a question for all you Toyota peeps...........

First the tech facts on what I have.....
92 Toyota 4 Runner
V6
Auto tranny 340H
AC
4 X 4
35" Thornbirds

As the story onfolds..........
Last Christmas, my tranny went out......no reverse. When I got to my shop monday morning, the truck went on the rack and the tranny came out. After realizing that rebuilding the tranny and transfer case would be around $1000 just for the parts.................decided to take the salvage yard route and get a used one. Got a used one for $500 and replaced the stock "Lexus High Stall Converter" with a new "low Stall". Changed the seals and filter. Put it back in and it runs/shifts fine..................

However.................
Around town isn't a problem but when I get out on the highway for awhile, the tranny "Fluid Temp Light" comes on. I pull over....wait five minutes...........and it goes out. I can get about 30 or 40 miles of highway before it comes back on. My old tranny, the light came on on me mybe once the whole time I had the truck.

I just used the tranny fluid we had on the shelf. Since the tranny and transfer case share fluid, should I use some sort of special high temp fluid...........who makes it? I have heard of tranny fluid for 4x4, but not sure the right/best to use.

Thanks in advance.............. [img]/ubbthreads/images/graemlins/confused.gif[/img]

hupptoy · #2 05-24-2005, 09:47 AM

What type of fluid did you use? If you use the wrong type, you will have problems.

hupptoy

DedDuck · #3 05-24-2005, 07:52 PM

Dextron III

JEFF_S · #4 05-24-2005, 08:35 PM

Maybe your tranny cooler is plugged with mud? Do you have the extra cooler mounted off of the transfer case too?
Jeff

DedDuck · #5 05-25-2005, 06:55 AM

When I was under the truck, I saw the extra cooler off to the side and removed it and cleaned it. I'm thinking that I need a high-temp fluid but don't know what would be the best to use.

hupptoy · #6 05-25-2005, 09:30 AM

Using high temp fluid is not a fix, you need to figure out what is causing the high temps and fix it. Did cleaning the cooler stop it from overheating?

I have towed 5K lbs on the highway for hundreds of miles with my 99 and never had the tranny temp light come on, so I don't think yours should with no trailer.

hupptoy