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

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.

"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