Full Throttle, No Downshift
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Freshman User
Joined: May 2004
Posts: 28
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From: Morehead, KY
Full Throttle, No Downshift
:-x09 1999 Ford Xlt 4.0 Sock(sohc).i Changed The Tp Sensor And No Luck. What Could Be The Culprit. From A Full Pedal Exceleration From A Dead Stop It Shifts Through All Gears Properly. And Can Down Shift When Using The Shift Lever. Full Pedal Stomps From Any Speed Will Not Make A Downshift Happen. Can I Fix This Myself Or Do I Just Need To Take It Into The Shop. According To The Chilton Manual On Troubleshooting It Says There Is No Adjustment That Can Be Done Or Do It Yourself Service That Can Be Done. The Manual Even Says Take It To The Dealer. The Trans Don't Slip, Buck, Kick, And From A Stop Shifts Through All Gears Great. Please Help.:-x01
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Joined: Aug 2003
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wow...you typed each word with capital letters, how long did that take you? anyway i had a problem like this a little while ago with my 2000 XLT 4.0 and all i did was change the ATF fluid with the mobil1 synthetic ATF mercon substitute (had the ford dealer find me that). it works like a charm
Senior User
Joined: May 2004
Posts: 392
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From: Las Vegas, NV
Mobil 1 is not rated for Mercon V. If you have the five speed it requires Mercon V and not Mercon. If your '99 XLT 4.0 SHOC has the 5R55E transmission ("D" code on driver's door sticker under "TR") like my '99 XLT 4.0 SHOC 4WD does, then it requires Mercon V.
I used Valvoline's synthetic blend in mine because Amsoil was too expensive.
I used Valvoline's synthetic blend in mine because Amsoil was too expensive.
Thread Starter
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Freshman User
Joined: May 2004
Posts: 28
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From: Morehead, KY
As far as my capital letters go I am having a glitch with my mircocrapword and apparently affects typing on forums and chats. Anybody know a forum for my broken software now that I know where one for my broken truck is at.
Took the "BURDEN" today to a friends trans shop. Guy told me he has fixed this type of problem a lot recently. Said one or more of the switchs that control the valve body inside the transmission isn't within range on voltage and a scan picked it up. Said it will cost me $115 including a filter change, fluid change, and the switch its self. The dealer already told me something similiar to this but when they said $600 I no longer wanted to believe them(I'm cheap), but they wanted to replace the entire valve body. This local guy said he would be his shop that the one possible to switches fixes the problems and that it would not need a whole new valve body. Transmission has no other side affects and shifts with the shift lever.
Took the "BURDEN" today to a friends trans shop. Guy told me he has fixed this type of problem a lot recently. Said one or more of the switchs that control the valve body inside the transmission isn't within range on voltage and a scan picked it up. Said it will cost me $115 including a filter change, fluid change, and the switch its self. The dealer already told me something similiar to this but when they said $600 I no longer wanted to believe them(I'm cheap), but they wanted to replace the entire valve body. This local guy said he would be his shop that the one possible to switches fixes the problems and that it would not need a whole new valve body. Transmission has no other side affects and shifts with the shift lever.
