1994 3.0 Auto 4Runner, 178K. When the truck is sitting, no tranny leak. If I reverse down our long driveway and drive back fluid is dumping from the rear of the tranny. It appears to be coming from a weep hole located about 3 inches forward of the rear drive shaft, drivers side. From the time I place it in park and jump under the truck there is a stream of fluid coming off the bottom skid plate. I can't say I've ever seen a worse leak.

Any help would be appreciated.

 

are you properly checking the fluid level? Maybe you overfilled it?

 

Nope, not overfilled, and yes I have checked it in the past. I dug a bit deeper in to the forum this afternoon and found a post that made me smack my forehead...there should be no tranny fluid coming out of a weep hole in the transfer case...

Question is, how is it getting back there? Anyone see this happen before or know which seal needs to be changed between the tranny and the diff?

Thanks in advance.

 

dont hold me to it but i thought the tcase and trans are mated and share fluid

 

Well, that blows a hole in my theory...does anyone know for sure? What is this weephole for?

 

take a picture of the weep hole, and we will go from there.

 

OK,
Sorry for the delay in getting back but I'm building a 3,000 square foot shop and it has taken away from my toyo project. Today I had a break in the building due to an incoming storm and thought I'd get a bit deeper into why the tranny was leaking...it took about ten minutes to find the problem.

I removed the aft transfer case skid plate and violla...a 3 inch hole in the bottom of the transfer case....nice.

I removed the back of the case to find the internal chain was busted in half and balled up under the front wheel driveshaft spline shaft....little pieces of linkage all over the place. Now I know why the front driveshaft was missing when I bought it at auction.

Needless to say I am going to need another transfer case. If you know of anyone who has one please let me know. The local junk yard has one for $250 (they pull)...problem is that the truck has 200K miles on it; it doesn't give me a warm fuzzy. I'll put out an ad on the parts wanted page as well.

 

Yes, you're right, they do share tranny fluid; found that out when I split the case.

 

Wow you do know how rare that is right? I've only ever seen that happen one time before due to lack of fluid in 4L. That sucks the 3.0 T-cases are very strong too.

 

I wouldn't be scared of the 200k t-case. Just call the yard and tell them another yard has one for $200 and ask if they will go $175 or at least match the price. Works evertytime for me!

 

I was trying to think of what the PO was doing to bust a 6 link wide chain. There was 1 inch of metal shavings in the transfer case but oddly enough the tranny had none; I drained the oil to be sure. I plan on flushing it and changing all the seals/filters/gaskets to make sure I get it all out.

Not getting any love on anyone with a transfer case...anyone know of one lying about?