03 expedition 2wd was only going in reverse not drive so i swapped the tranny from a 04 expedition (4r70w) now speedo maxes out to 100 mph even though im only going 30 mph and car wont shift at all like if its in limp mode already swapped vss and tps and still no change what can i also check for ?
Swapped trans from a 04 expedition to a 03 expedition and now speedo maxing out to 100 mph
- Thread starter CJ117
- Start date
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S20Workstation4
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Any codes? The CEL won't light up for transmission issues, unless its a big issue.
Speedometer maxing out probably means its getting a short circuit somewhere/bad connection.
I would check the wiring for the main TCM connector that's on the back of the transmission.
Did the TCM get programmed to the car after the tranny swap was done?
Speedometer maxing out probably means its getting a short circuit somewhere/bad connection.
I would check the wiring for the main TCM connector that's on the back of the transmission.
Did the TCM get programmed to the car after the tranny swap was done?
No codes at all and no the tcm did not get programmed after the swap will check the wiring to see if i find anything
whtbronco
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Do you have an OBDII scanner or ForScan to read the transmission codes from the PCM and to watch what the transmission is doing? Just a cheap code reader is not gonna do it for this.
On my 2004 the TCM is the transfer case module.
On my 2004 the TCM is the transfer case module.
DieselMonk
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You probably won't find anything in the wiring. The speed sensor is different between these two transmissions. You need someone that programs the PCM for the newer speed sensor. That also explains weird shifting situation. Next question is after all this is; Will be the shift timing be correct?
the transmission you are talking about is a 4r75w/e i didnt swap it with one of those i know those transmissions have a different ring gear but i doubt ford changed the 4r70w ring gear just for one year
whtbronco
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Several of us compared the transmission ID tag recently and identified that our 2004 models had the 4R75 which certainly surprised me. My tag is 4L1P-DA. Anyway this list of model numbers might help if there's any question on the trans identification.
whtbronco
Full Access Members
Ugh that sucks, but at least it's answer.
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