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5R55W transmission slipping.

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Old 08-15-2009, 06:53 PM   #1
zerodevil
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5R55W transmission slipping.

So i just passed 108,000 miles on my 2003 explorer 4.6L 4x4. and my transmission has begun to slip. EX: rpm goes from 2k to 4K and my speed increases by about 3 mph, not typical of my truck at all. I Did a brown wire mod a while back(and havnt realy dont much tire roasting, not even a burn out). im not sure how these T-cases are made, but i think it just goes straight through in 4x2 so im probably 90% sure its my transmission failing. I was wondering if at this early phase (done it twice in the last week), if it is still fixable, or if i am looking at a rebuild / replacement. Also, has anyone else had this fixed? about what did you pay for the repair or rebuild.

Thanks guys
Jared.
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Old 08-15-2009, 08:44 PM   #2
shadowless127
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Originally Posted by zerodevil View Post
So i just passed 108,000 miles on my 2003 explorer 4.6L 4x4. and my transmission has begun to slip. EX: rpm goes from 2k to 4K and my speed increases by about 3 mph, not typical of my truck at all. I Did a brown wire mod a while back(and havnt realy dont much tire roasting, not even a burn out). im not sure how these T-cases are made, but i think it just goes straight through in 4x2 so im probably 90% sure its my transmission failing. I was wondering if at this early phase (done it twice in the last week), if it is still fixable, or if i am looking at a rebuild / replacement. Also, has anyone else had this fixed? about what did you pay for the repair or rebuild.

Thanks guys
Jared.
could be a solenoid pack.




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Old 08-15-2009, 10:33 PM   #3
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god i hope not, i just had that put in when i did my engine swap last month...i may be returning to that trans shop with some compaints
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Old 08-15-2009, 10:46 PM   #4
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The solenoid blocks tend to act up around 60K miles so it might be a problem with over 100K miles. Do you get a flashing overdrive light or a check engine light?
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Old 08-15-2009, 11:20 PM   #5
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negative, and i just had NEW sylenoid blocks put in all of 5 thousand miles ago.
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Old 08-17-2009, 12:55 PM   #6
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My rebuild cost me around $1800. I am not completely satisfied with the end results, but it is better than it was before.




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Old 08-17-2009, 03:21 PM   #7
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wow, i have a line on a 6r60 for around 1500 bucks, and if im out 300 bucks for drive shaft modification i may just come out ahead...i might upgrade rather than rebuild...thanks for the help guys.
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Old 08-17-2009, 10:16 PM   #8
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wow, i have a line on a 6r60 for around 1500 bucks, and if im out 300 bucks for drive shaft modification i may just come out ahead...i might upgrade rather than rebuild...thanks for the help guys.
Do tell more? Are you hinting that there is a replacement tranny that can be installed?




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Old 08-17-2009, 10:51 PM   #9
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because the new 4.6L's have the same engine block, im VERY sure that a swap from our 5r55w' and s's can be made to the 6r60 and the gen 4 explorers. my only question is that if i will need new drive shafts, and a different wiring harness, im going to examine one later this week, i may also need the lines from the trans to the trans cooler, im sure they could be fabbed up if they arnt the same ones used on mine already...if my trans repair bill is going to be around 2 grand, im just going to do the swap and call it another upgrade on my long road to a sport truck with 550 rwhp.
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Old 08-17-2009, 11:54 PM   #10
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Originally Posted by zerodevil View Post
So i just passed 108,000 miles on my 2003 explorer 4.6L 4x4. and my transmission has begun to slip. EX: rpm goes from 2k to 4K and my speed increases by about 3 mph, not typical of my truck at all. I Did a brown wire mod a while back(and havnt realy dont much tire roasting, not even a burn out). im not sure how these T-cases are made, but i think it just goes straight through in 4x2 so im probably 90% sure its my transmission failing. I was wondering if at this early phase (done it twice in the last week), if it is still fixable, or if i am looking at a rebuild / replacement. Also, has anyone else had this fixed? about what did you pay for the repair or rebuild.

Thanks guys
Jared.
My tranny did the same except it threw a OD light code. Dealer had to change the solenoid pack and torque converter. She shifts fine now when on accelerator. Seems sluggish at time when being light on gas. both fixes the dealer charged just over 1k for. They should have just rebuilt the whole tranny for little more.

Any codes?




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Old 08-17-2009, 11:58 PM   #11
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The dealer should have flashed the PCM to install a new tune for the transmission. This would get rid of the sluggishness.
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Old 08-18-2009, 12:06 AM   #12
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The dealer should have flashed the PCM to install a new tune for the transmission. This would get rid of the sluggishness.
I will give them a call.

I bet they will want to charge me though.

Thanks for the info.




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Old 08-18-2009, 12:36 AM   #13
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no codes, no lights, just slipping every now and again...i just had a sylanoid pack put in now 2 months ago...so if its those im going to be pretty upset.
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Old 08-18-2009, 12:41 AM   #14
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When I called my warranty company to check on why they were taking so long to approve my torque converter, they said that they wanted the dealer to find the real issue and that 2-3 slip was very common for my truck with claims.

When I spoke to the Ford tech who was working on my truck he said adding friction modifier to the trans usually fixes slip issue. Maybe you can try that.




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Old 08-18-2009, 01:34 AM   #15
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its even done a 2-5 slip and i got like 5 mph out of that one. Im not so sure about adding friction mod to the tranny fluid, but i can look into it. thanks for the heads up.
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Old 08-18-2009, 09:44 PM   #16
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Keep us informed

We'll be happy to hear about your results.




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Old 08-27-2009, 08:53 PM   #17
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5r55w slipping too

I have an 02 explorer xlt and we just changed the solenoid pack after getting error code P0755. O/D light was flashing and has now stopped but the tranny just doesn't shift properly. It took me 5 minutes just to get out of my parking space!!!!

The 4x4 lights haven't come on in the truck once since we have it and I read at the beg of this thread that they should....any insights?
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Old 08-27-2009, 09:00 PM   #18
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P0755 Shift Solenoid B Malfunction. Check the internal electrical harness, the solenoid, and the bulkhead connector.
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Old 06-26-2010, 05:45 PM   #19
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Correct me if I am wrong but I beleive the ecu went through a major change in 05. I think that the electronics between the 5r and 6r might be rough!
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Old 06-27-2010, 08:21 PM   #20
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Swapping Trannies?

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Correct me if I am wrong but I beleive the ecu went through a major change in 05. I think that the electronics between the 5r and 6r might be rough!
No expert, but I do know that having worked with PCM harnesses extensively, actual connections, as well as wire color codes, often change, even year-to-year.

This suggests that unless someone positively confirms having replaced an electrically-shifted transmission with some other trans. designation with acceptable results, it would in my opinion be folly to expect that sticking in a different trans. will work properly. A whole lot of labor is at stake here.....imp
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