B&M external cooler install underway. Need help!

jaredking733

New member
Hey all,

I recently had my transmission fluid flushed at my local transmission shop, just like I do every 30k.

I told them to do the usual inspection along with the flush and let me know if there is anything that needs attention. After completing the flush and inspection, I was told that everything looks unusually well maintained and running great for a vehicle with this age and miles (97 T4R SR5 4x4 w/ 230k). The only thing they mentioned that may need attention is the external cooler. It is the older style which is just metal tubing curved back and forth through some metal fins and was in pretty rough shape.

Since then, I have ordered the B&M 70264 (I think) and am attempting the install as we speak.

Everything has come along fantastically until it comes to removing the old 3/8 rubber line from the steel transmission send/return lines.

Is there a trick to removing these from the steel nipple? I have pulled and tugged every which way and cannot get them to budge. I'm afraid that I may bend the steel lines if I pull much harder. Not sure if that should be a concern or not.

I have attempted to get a utility knife up there to cut the old line, but there's just not enough space to work with. I even considered just cutting the lines off closer to the steel lines, then attempt to cut what is left off, but I'm afraid I won't have enough to work with then and will be screwed.

Anyone have any suggestions? If I could just get those off, I'd be about 30 minutes from a complete install.
 
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Pliers use pliers around where the line meets the pipe. Pinch it just enough and move it side to side hopefully it will give
 
I bought extra rubber hose from part store.

I'll try the side to side method in the morning.

I bought new hose too. I could have got by with doing just the cooler, but I have no idea how old the current hoses are, and they seem to have been spliced in a few places so I want to just replace them for peace of mind.
 
I couldn't get mine off so I just cut a slit with a box knife to loosen them up a bit.

I tried that, but only had a full size box cutter on hand so it didn't give me much room to work with.

I'm going to swing by home depot tonight and see if I can find a smaller one. Also, my blade probably isn't the best.
 
Is getting the new hoses back on as hard as getting the old ones off?

I was thinking about dipping the end of the new hose down in a bottle of transmission fluid for lubrication to make it easier.
 
Got one of them off.

Ran out of light and will tackle the other tomorrow.

Does anyone know which steel line is the send and which is the return? I'm talking about laying under the truck, looking at them from the front.

Thanks all!
 
Got one of them off.

Ran out of light and will tackle the other tomorrow.

Does anyone know which steel line is the send and which is the return? I'm talking about laying under the truck, looking at them from the front.

Thanks all!

Here you go.
 

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I'll try the side to side method in the morning.

I bought new hose too. I could have got by with doing just the cooler, but I have no idea how old the current hoses are, and they seem to have been spliced in a few places so I want to just replace them for peace of mind.

You are replacing the hoses with transmission hoses correct? Trans hoses will handle the higher pressures from the transmission.
 
You are replacing the hoses with transmission hoses correct? Trans hoses will handle the higher pressures from the transmission.

Yes. I made sure to buy specifically transmission hose. From my research here, I learned there is a difference. Never really knew that before hand.
 

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