95 4.3W - transmission/brake fluid in vac line - collecting in vac reservoir??

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- AWN
  
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posted
17 years ago

Sun, Mar 25, 2007 2:22 AM

Here¹s something I don¹t imagine you see every day...

I have a 95 4.3W series Jimmy that has been ?leaking¹ transmission fluid (might be brake fluid but I don¹t think so based on the deep pink colour and smell) - it¹s collecting in the under-the-hood vac reservoir ?ball¹.

Can someone explain to be what might be happening?? Both the motor and transmission are nearly brand new but I¹d like to know what to ?chat¹ about when it goes in for the warranty work if needed.

It seems like it¹s been a little low on transmission fluid lately and I can¹t find any leaks in the pan, cooler, or lines except today when I checked a host going to that vac booster ball and found the pink stuff.

I am stumped but it wouldn¹t be the first time.

Thanks and take care, Andrew.

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posted
17 years ago

Sun, Mar 25, 2007 3:11 AM

I know you¹re all thinking that it¹s just a simple matter of an overfilled transmission... I¹m not sure it¹s that simple. I will triple check it but I don¹t think the fluid level is too high. Maybe some hard braking caused the fluid to travel up the vent line? Is that possible??

Thanks. Andrew.

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- shiden_kai
  
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posted
17 years ago

Sun, Mar 25, 2007 5:15 PM

"AWN" wrote

This is a bit of a guess, but it's not uncommon for the transfer case switch that controls the front diff engagement (I'm assuming this is a 4x4, though you didn't specify that) to suck fluid from the t/case up through the vacuum lines. It's also not uncommon for the transfer case front seal to suck transmission fluid from the automatic into itself. Both the transmission and the t/case in that year use the same fluid.

You might try checking the fluid level of the t/case. If it pours out of the fill hole, then I'd say that you may have two repairs you will need to do. Replace the front seal on the t/case, and replace the switch on the t/case. By the way, the oil coming up through the vacuum lines will often destroy all of the vacuum lines, including the ones in the dash that control your heater and a/c blend doors.

Ian