how to flush trans lines?
Thread Starter
Joined: Jul 2005
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how to flush trans lines?
Just downloaded the manual from lil (thanks again). I have a suspicion someone may have put the wrong trans fluid or additive in my transmission (long story involving x-mechanic who "rebuilt"the transa few years ago). I've since heard dodge automatic transmissions are very sensitive, and I thoughtI'd try and flush out the entire system. Is this possible without dropping the transmission? Will I need to remove the torque converter? I have a few days off from workwant to do this myself. I have rebuilt a transmission before, but that was 30 years ago.
Thanks ya'll,
Zeb
Thanks ya'll,
Zeb
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Joined: Dec 2003
Posts: 4,119
Likes: 5
From: Sycamore, Illinois (displaced to Arkansas)
RE: how to flush trans lines?
How I've done it is just disconnect the line going from the radiator/cooler back to the transmission. I don't know which line it is exactly, however, so maybe someone can chime in, but it isn't too hard to figure out.
Anyways, it wouldn't be a bad idea to also replace the filter. Drop the pan, clean the magnet (and pay attention to any debris found in the pan or magnet). Install new filter, and put the pan back on. Fill transmission to acceptable level (do not start motor yet).
Than, disconnect the line going from the radiator/cooler back to the transmission (versus disconnecting the line going from the transmission to the radiator/cooler, so that you can flush the fluid thats in the radiator/cooler) After thats disconnected and aimed into some kind of container, have a helper turn the truck on and put the transmission in neutral. Now its as simple as pouring in new fluid at the same rate as the old fluid is coming out. You know your done when you see clean fluid coming out.
After that, turn the truck off, and reconnect everything. Check the transmission fluid level again (with the truck off) just to make sure it registers on the dipstick, than take her for a drive to warm it up, and check the fluid level again. (Transmission warmed up, in neutral, engine running, and on a level surface)
This will take in the neighborhood of 11quarts of fluid. (Remember [well, you probably know], while the pan only holds about 4 quarts, the torque convertor holds about 5 quarts and all the plumbing holds maybe another quart or so).
Anyways, it wouldn't be a bad idea to also replace the filter. Drop the pan, clean the magnet (and pay attention to any debris found in the pan or magnet). Install new filter, and put the pan back on. Fill transmission to acceptable level (do not start motor yet).
Than, disconnect the line going from the radiator/cooler back to the transmission (versus disconnecting the line going from the transmission to the radiator/cooler, so that you can flush the fluid thats in the radiator/cooler) After thats disconnected and aimed into some kind of container, have a helper turn the truck on and put the transmission in neutral. Now its as simple as pouring in new fluid at the same rate as the old fluid is coming out. You know your done when you see clean fluid coming out.
After that, turn the truck off, and reconnect everything. Check the transmission fluid level again (with the truck off) just to make sure it registers on the dipstick, than take her for a drive to warm it up, and check the fluid level again. (Transmission warmed up, in neutral, engine running, and on a level surface)
This will take in the neighborhood of 11quarts of fluid. (Remember [well, you probably know], while the pan only holds about 4 quarts, the torque convertor holds about 5 quarts and all the plumbing holds maybe another quart or so).