Transmission lines leaking.

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Dec 16, 2004 | 05:19 PM

Yoshi

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Transmission lines leaking.

Hi,

I have a '90 Aerostar with a 4.0 and the transmission lines seem to be leaking, especially near the front right before the radiator. They are leaking a little by the tranny but only sweating a little. Does anybody know how hard they are to replace or is this something I should leave to a tranny shop?

Dec 16, 2004 | 05:49 PM

cbr900

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From: brooksville, florida

you don't need to replace them unless the pipes them selfs are leaking, most times it is the joints to the rad or tranny, undo the joints and put some plumbers teflon tape around the pipe just after the nut that connects the pipe to the tranny or rad and do them back up again, make sure you dont put the tape over the ends of the pipes or you will block the flow of fluid.

Dec 16, 2004 | 05:53 PM

Yoshi

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I'm not sure, it almost looks as though they are leaking from the pipes themselves, but I could be wrong. By joints you mean the rubber ones, right?

Dec 16, 2004 | 06:01 PM

Yoshi

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So if the actual metal pipes are leaking, what kind of job is it to do?

Dec 16, 2004 | 06:49 PM

cbr900

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From: brooksville, florida

well I just mean the connections on the ends of the pipes were they connect onto the rad and tranny, if the pipes are leaking get another set from a wreakers yard, very easy to do, hardest part is getting to all the clips that secure the pipes to the engine, I think there is only two or three though.

Dec 17, 2004 | 05:58 PM

bertha66

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From: Central Oregon

If the leak is at the rubber, check the clamps or replace the rubber line. While you are in there you may think about putting on a trans cooler. just something to think about.

Dec 17, 2004 | 08:07 PM

copper_90680

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From: Southern California

Are you sure it's the tranny line that's leaking. I had the same thing and I thought the same way, until I found out that the red fluid actually comes from the busted high pressure power steering hose. If it's leaking from the line going into the radiator, that's easy. Take off the line, unscrew the two big fittings on the radiator, clean them up well and replace the O-ring inside the fitting. Yes, there is an O-ring inside that flared-tubing fitting you can take out with a small flat screwdriver. When you put the fittings back on the radiator, use a little permatex thread sealant on it, nothing much, just the first one or two threads, and don't over-tighten them. Then you can put the tranny lines back on those fittings. The lines going into the tranny are the same way, with O-rings inside the fittings.

If the leak is where the rubber hose meets the metal line, you can buy rubber tranny hoses and replace them. When you put the hose clamps on, buy the kind of hose clamps used for fuel injection lines. Those can put quite a bit of clamping power on the hose without chewing it up like the regular worm-drive hose clamps.

Good luck