7.3 diesel e4od trans problems HELP!!!!

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Jun 19, 2010 | 10:25 PM

rotralisabe

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7.3 diesel e4od trans problems HELP!!!!

Hey guys, Im new here and I am kind of stumped. i have a 1991 f-450 super duty box truck. It has the e4od trans and will not take off in 1st gear. i have to manually shift everytime I take off also. Once in a great while it will go from second into what seems like neutral. when this happens I suddenly have 1st gear back as long as this is happening. but I still have to manually shift everytime. I just changed the trans filter and and the mlps unit. I had very high hopes that changing the mlps would solve the problem but it didnt change anything. I have tried to search the forums but havent found another with the same problems.

Jun 20, 2010 | 06:51 AM

Lazy K

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Not an expert but I think I would check for trouble codes.
Do the tach and speedo both work properly? When you fitted the new MLPS did you align the marks before tightening the bolts?

Jun 20, 2010 | 10:04 AM

rotralisabe

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yes, I aligned the marks before tightening. the speedo works fine but doesnt have a tach. Can i get the codes read at an autozone?

Jun 20, 2010 | 01:48 PM

Lazy K

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even if you don`t have a tach on the dash I would think there is a tach sensor for the E4OD. It is like a big hex nut with two wires to it on the housing beside the engine oil filler cap. Make sure that the wires are good at the sensor and that the plug is clean and tight.
It is unlikely that Autozone would be able to read the codes but you could try.
You would need an OBD1 code reader (can be got for under $30.00) or it may be possible to read them using the self test method.
Alternatively a decent trans shop should be able to read them.
However check the tach sensor first.

Jun 20, 2010 | 01:53 PM

wickedklown83

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From: Washington County, Penna

last time i checked autozone's website they do carry the OBD1 tester, but from what i can tell it aint no better than just running a self test yourself, and the self test is free versus the 30... i know that everyone recommends a different brand but i dont remember what it is, anyways if you dont know how to run a self test then just follow the link for a full description

Ford Fuel Injection How To Run a Self-Test

Jun 21, 2010 | 03:33 PM

rotralisabe

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Ok, I just had a chance to check for the plugs involved in testing and Im pretty sure I found them but the 6 pin plug only has 2 wires going to it and the sti plug doesnt have a insulated end. I did try to ground out the sti plu and do the test but nothing happened. I tried to include a pic but apparently Im too stupid to figure it out.

Jun 22, 2010 | 04:32 AM

Lazy K

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A problem may be that, with yours being a diesel, you may not have a malfunction indicator light (MIL). So if you look again at the link for the self test you could put a small test light in the circuit or a meter to get the codes.