tranny fluid change
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tranny fluid change
I've got a 1999 ford expedition xlt 4x4 4.6L 4r70w- if I remove tranny line and start engine and pump fluid out to do fluid change will tranny put out a dtc error that I'll have to get cleared?
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From: Annapolis, Maryland
Scott- not sure about disconnecting the line or the error, but are you sure your tranny doesn't have a drain plug?
That would make things easier. If not, it's still never a bad idea to pull the pan, replace the filter, and clean the magnets off.
Just my $.02
XXL
That would make things easier. If not, it's still never a bad idea to pull the pan, replace the filter, and clean the magnets off.
Just my $.02
XXL
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Personally I wouldn't "change" my fluid this way, but to answer your question, simply disconnecting the battery for 15 or so minutes will clear the codes.....provided the pcm doesn't read a new code upon reconnection/starting.
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thanks for error code tip- now I know not to trust tranny guy I talked to today since he told me of a lady who comes to him about once a year to get a tranny error code cleared for $25 for 3 years now and told me if it comes on infrequently like this I could do the same- but of course he never mentioned disconnecting battery for 15 min.!! Jerk
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Scott, running the tranny dry, even briefly, is a bad idea. Just change the fluid every 30K and the tranny should be happy. I have a 4R70W in my Expy, and other than a bad 2-3 accumulator spring that I ultimately replaced, has worked well, even though I drive in hilly terrain with a 100-degree weather temperature swing over a twelve-month period.
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Thanks PaulC where could I purchase that part and other pieces around it -I think theres a valve or piston.... I got a PO782 error that just stated 2-3 shift error, tranny mech just talked about unfelt slippage through pressure loss due to a bad factory weld on drum that holds clutches where seal is welded on. Anybody know if this is bs? did not occur to me it could be a HIGH pressure error. Does anybody know if this code validates a high pressure problem as well as a low pressure problem???????
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From: Florida
scottskingdom-
I just did a fluid/filter change on my '00 4R100A tranny. I drained all the fluid including the lines and did not get an error code. I used the tranny pump to clear out the cooling lines. I have always done it this way and never had a problem. I drive the truck a little first to make sure everything is lubed and the pump is not running dry. However, I would take PaulC's advice over mine. You can disconnect both the cooling lines at the tranny and use some low pressure air from a compressor to get the oil out of the cooling lines. Most of it would probably drain by gravity with both lines disconnected anyway. Since you're already in there, get out all the old fluid you can.
Do you have a drain plug? There is some confusion, but my understanding is that 4x4s do have them (atleast with the 4R100A), mine does not (2wd).
I just did a fluid/filter change on my '00 4R100A tranny. I drained all the fluid including the lines and did not get an error code. I used the tranny pump to clear out the cooling lines. I have always done it this way and never had a problem. I drive the truck a little first to make sure everything is lubed and the pump is not running dry. However, I would take PaulC's advice over mine. You can disconnect both the cooling lines at the tranny and use some low pressure air from a compressor to get the oil out of the cooling lines. Most of it would probably drain by gravity with both lines disconnected anyway. Since you're already in there, get out all the old fluid you can.
Do you have a drain plug? There is some confusion, but my understanding is that 4x4s do have them (atleast with the 4R100A), mine does not (2wd).
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no drain plug with my puny engine/tranny combo! (just deeelux 5.4L) 
And they have the nerve to demand a fluid change every 30000. Next they'll remove our oil pan drain bolts on our engines and demand an oil change every 1000 miles!!! 
And they have the nerve to demand a fluid change every 30000. Next they'll remove our oil pan drain bolts on our engines and demand an oil change every 1000 miles!!!
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From: Annapolis, Maryland
Originally posted by scottskingdom
no drain plug with my puny engine/tranny combo! (just deeelux 5.4L) And they have the nerve to demand a fluid change every 30000. Next they'll remove our oil pan drain bolts on our engines and demand an oil change every 1000 miles!!!
no drain plug with my puny engine/tranny combo! (just deeelux 5.4L)
And they have the nerve to demand a fluid change every 30000. Next they'll remove our oil pan drain bolts on our engines and demand an oil change every 1000 miles!!!
Just drill a hole and and you're done. It's worth a shot.
Where did you hear about pulling the line to your tranny? These things are so tempermental, I'd imagine it would cook itself in a hurry. Then again, maybe it's one of those odd tricks that only our grandfathers know about...
XXL
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definately planing on getting pan bolt kit- they carry them at advanced auto too -for next time.
heard of that tranny line drain procedure of course right here- on this site. I'd never heard of doing that either and Im not a youngin' either , always got nice and dirty under there like everyone else. The thought scares me cause we all know a tranny can slip just being a few ounces low.
heck on the site they even say put it in gear halfway thru draining! -- ya know its slipin'.... I still might cheat and drain 3+ quarts out (to lighten pan) leaving it in PARK- and just use compressor to clear lines. I drained 1 quart out to add a quart additive in this fashion-- It took less then one second (no exageration) for one quart with hose I used! amazingly quick and easy but whats safe?
heard of that tranny line drain procedure of course right here- on this site. I'd never heard of doing that either and Im not a youngin' either , always got nice and dirty under there like everyone else. The thought scares me cause we all know a tranny can slip just being a few ounces low.
heck on the site they even say put it in gear halfway thru draining! -- ya know its slipin'.... I still might cheat and drain 3+ quarts out (to lighten pan) leaving it in PARK- and just use compressor to clear lines. I drained 1 quart out to add a quart additive in this fashion-- It took less then one second (no exageration) for one quart with hose I used! amazingly quick and easy but whats safe?
Last edited by scottskingdom; Dec 19, 2003 at 01:53 AM.
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My R4100W ('00 EB) holds 16 qts. Draining the pan via the pan drain bolt only yields 4 qts. I've decided that using the tranny fluid exchange machine down at my local Jiffy Lube (etc.) is the only effective way to exchange all 16 qts at one time. Somewhere on a forum I read that there is a drain plug for the torque converter, but I can't figure out how to get the new fluid back into the converter??? If I start the engine with the converter dry, will it damage it??
