Trans stuck in 4th gear - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 04-13-2012, 11:09 AM Thread Starter
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Trans stuck in 4th gear

Yesterday I was going down the road doing 55mph and my trans(torqshift) dropped into 4th and wouldn't down shift. I had to use a jumper wire to start it even. We're thinking a stuck solenoid or something but not sure. Anyone help shine light on the subject?

Thanks


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post #2 of 9 Old 04-14-2012, 07:33 PM Thread Starter
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Anyone?


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post #3 of 9 Old 04-14-2012, 08:03 PM
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What do you mean that you had to use a jumper wire to start it? Are you sure that your shift cable didn't break and stick the trans into manual 3rd?

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post #4 of 9 Old 04-15-2012, 05:39 AM Thread Starter
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I can shift the trans into reverse but it's stuck in 4th when forward. Basically I had to jump the starter bc the computer thinks its in 4th.


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post #5 of 9 Old 04-15-2012, 06:02 AM
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Try Unplugging the fan clutch.
I know it sound weird but try it
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post #6 of 9 Old 04-15-2012, 06:55 AM
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Any codes? Does your tow/haul light flash on and off? Could also try disconnecting the batteries for a couple of minutes.

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post #7 of 9 Old 04-15-2012, 07:46 AM
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If you had to jump it then I would be suspecting an issue with the transmission range sensor. You need to get it on a scanner, check codes and see if your range sensor reading matches the indicator on the dash.

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post #8 of 9 Old 04-15-2012, 10:05 AM Thread Starter
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Another twist is that I did a cummins swap so I have a pcs controller so no fan clutch either.


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post #9 of 9 Old 04-15-2012, 04:43 PM
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Quote:
Originally Posted by drmisherre View Post
Yesterday I was going down the road doing 55mph and my trans(torqshift) dropped into 4th and wouldn't down shift. I had to use a jumper wire to start it even. We're thinking a stuck solenoid or something but not sure. Anyone help shine light on the subject?

Thanks
Technically speaking, if it shifted out of overdrive, it's in 5th gear. The TorqShift is actually a 6 six speed transmission that only uses 5. More confusing is that it shifts like a semi:
1st___ 3.10
1stOD_2.20 (2nd)
2nd___1.53 (3rd)
2ndOD_1.09(4th)
3rd____1.0 (5th)
3rdOD_0.71(6th)
But because 2ndOD (or 4th gear) is 1.09, it skips to 3rd (or 5th gear), 1:1. Unless is like below zero, then it uses 4th, but shifts to 6th. This is why the SCT programmers ask for 3-5 and 5-6 shift pressure preference.

Depending on pedal pressure, if it only down shifted once, it could have just unlocked the converter because my converter is usually locked by the time I hit 55 and it feels like a gear shift.

Speculation aside, you should be able to manually shift between 1st and 3rd on the column, if not, you have solenoid and/or transmission issues. I bought a rebuilt valve body off eBay for $250 that included all 7 solenoids and wiring harness. Ultimately my clutches were shot, but this may be a place for you to start.

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Last edited by Karls03; 04-16-2012 at 04:12 PM.
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