My transmission cooling lines are leaking due to rust. It is dripping right at the spot the lines pass by the oil drain pan. Hope to be able to cut the rusted part out and repair with some compression unions. It is not leaking where the lines go in the radiator or transmission. My question is: Due I need to drop the transmission pan to do this? Looks to me that the only fluid that would come out when I cut the line would be from the cooler in the radiator. Also understand these lines are 5/16?

 

i been fixing them a lot lately on envoys. and have done s10s in the past, theres no reason to have to drain the fluid you will lose maybe at the most a half of quart. i dont know the size of the lines, if you want to be safe, cut out a bad section and bring it with you when you go buy the fittings.

 

That is what I figured. Now just have to get at and do the job......

 

I got new lines for under $20 a piece on Amazon. But you have to lower the transmission to install them from what I was told.

 

If you have the time and money?Replace both transmission cooler lines with stainless steel lines.That way you know they won`t leak.I still don`t know why GM put steel lines under the blazers..I had an 81 chevy malibu.It had all stainless steel gas lines, brake lines, transmission cooler lines.I had that car for 25 yrs.I`ve never once had a leak at all from any of these area`s.

 

kinda. its just a pain in the butt to get your hand up there. what i used to do, and what i been doing with the envoys, though it might be a bit harder as i have access to a car lift, is just support the transmission and remove the transmission crossmember, take a big ratchet strap and just ratchet the transmission to the driverside a inch or so so you have more room

or cut a big access hole in the floor would probably work too