Help 97 7.3 trans shifts halfway into 3rd? - Ford Powerstroke Diesel Forum
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Old 03-20-2014, 07:18 PM
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Exclamation Help 97 7.3 trans shifts halfway into 3rd?

Looking for some helpful advice please! I have a 97 f250 7.3 powerstroke automatic trans, with a f350 front axle/spring setup. It is pretty much completely stock except for a 4" straight exhaust and 35" tires. I bought the truck last august and do love it. However I have heard about some transmission problems and I am currently feeling a problem (I believe) between 2-3rd gear. It feels like it goes half way into 3rd gear when shifting and after reving to about 2200 or so rpm it completely shifts or locks into 3rd gear. What would cause this and should I be concerned? The speedometer has been replaced, I use all amsoil full synthetic fluids. I have heard of these trucks having bad shift points and was going to get a ts chip for it to help it out a little. Would that do me any good? I've heard people that love a good chip from a good tuner mostly for the shifting alone. Anyway if somebody could please help me out I would be extremely grateful! Thanks
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Old 03-21-2014, 03:42 AM
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Sound like you converter isn't locking right away when it goes into 3rd, what rpm's are you at when it leaves 2nd


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Old 03-21-2014, 04:00 AM
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Thanks for the response! It depends how hard I'm stepping on the pedal, usually it will try to go at about 1700-2200rpm and the revs will drop a little maybe 400 rpm and they will come back to about 2000-2200 rpm to fully get into 3rd gear. Some people have told me that's just how they are.. I don't believe it should I be concerned? Another person told me that by using a chip that increases line pressure it would help it shift better, but I feel like it's either a make it or break it type deal.
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Old 03-21-2014, 05:16 AM
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Random question, does your speedometer jump around alot at higher speeds?

If so try replacing your abs speed sensor. The tranny uses that signal to determine shifting patterns. My tranny was acting weird and then i finally replaced the sensor and it shifts 10x better than before.
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Old 03-21-2014, 06:15 AM
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It doesn't seem to jump around at all, the cluster was changed before I bought the truck. I also heard the 3rd brake light could cause an issue but mine works fine. The truck shifts great in every gear except 2nd-3rd and I don't know much about transmissions or torque converters but would think if it was the converter it would do that in every gear?
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Old 03-21-2014, 06:57 AM
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Quote:
Originally Posted by Evan97powerstroke View Post
It doesn't seem to jump around at all, the cluster was changed before I bought the truck. I also heard the 3rd brake light could cause an issue but mine works fine. The truck shifts great in every gear except 2nd-3rd and I don't know much about transmissions or torque converters but would think if it was the converter it would do that in every gear?
The speedometer doesnt really matter to the trans, its the signal from the sensor that matters to the trans and if you are getting a good reading on the speedometer id say the abs speed sensor is good. If your out of other options id try it just to be sure but i think its fine.

The third brake light only has to do with unlocking the TC because the trans uses the circuit to determine when to unlock so it shouldnt affect upshifting(someone more smarterter than me can correct me if thats wrong)

The E4OD locks the TC in at the end of 3rd and 4th gear and ive heard under certain circumstances in 2nd gear as well. It may make sense that 2-3 is hard if 1-2 is also acting up. Are you sure 1-2 is all good.
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Old 03-21-2014, 09:55 AM
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Thanks for the information, I haven't seen any problems with 1-2 in the truck even towing a trailer. The 2-3 is extremely noticible but once it locks in is fine. I'm new to this locking converter and don't really know anything about it. I've heard of a sensor that could go bad, but I don't know where or what it is. Also if it's lingering halfway into 3rd and I give it more pedal it will lock into 3rd faster so I wasn't sure if something like the chip would help it by increasing line pressure. I work the truck pretty hard it plows snow, tows trailers and whatever else I can make money doing so I'd like to catch the problem now before it leads to losing my transmission
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