Crawled under my truck today to do some prelubing for zuk mod and BJ spacers this weekend. I had noticed some old dried grease in this spot before but noticed today it has some fresh stuff on it now to. What do you guys think its coming from? one of the joints? yoke? driveline? Learning more about my truck everyday but still not sure on this one? Everything looks clean besides what "It" has thrown up on the under carriage.

 

hey i got the same thing, my guess is grease from the u-joint

 

I'd guess too much lube in the slip yoke combined with a weeping tcase.

 

Is it GREASE or GEAR OIL? Looks too wet and spread out to be just grease. My t-case output seal is leaking and it has thrown gear oil like that on the underside of my 4runner...

 

leaking tcase. there is a seal behind the flange for the prop shaft, change that and double check your fluid level on your tcase.

 

Grease your driveline and have a look at the pattern thrown by fresh excess grease.

 

Degrease and pressure wash clean. Then see where it's coming from easily.

My bet is leaking tcase.

:wabbit2:

 

I had/have the same thing, my t-case yoke was loose and probably causing the seal to leak. I tightened mine back to spec and no more leaks but it's not like I can tell 100% because of all the mud under there. lol. I got lucky if it's not leaking any more and you may or may not need a new seal and/or bearing. That reminds me I got to check my t-case fluid level when I get my truck back from the frame shop.

 

Thanks for the tips guys, ill investigate further this weekend and let ya'll know