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post #1 of 22 Old 05-11-2012, 10:47 AM Thread Starter
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trans issues

okay here is the deal. I have a 97 PSD auto with 157K on it. i have been having transmission issues off and on for a couple of months. I have no clue what it is. Some times it will drive just like it should and others it will shift late and hard from 1-2 and then early from 2-3, 3-4, 4- lockup. I was getting a code for the VSS i replaced it. no change sometime it was fine other times see above. more recently the TC will not always lock up when it should and sometimes it will unlock driving down the road. I am thinking something electrical.

yesterday is change the fluid in the rear diff and inspect the tone ring, fluid is a little dirty tone ring seems fine, clean the vss and put it all back together. check all the brake lights find that the sockets for the 3rd brake light are burnt (though it still works.) swap with one from my other truck. I took it out today and it drove fine for 8 miles then it had the problems it has always had shifting hard and late then early with a flashing OD button. then it got worse hunting for gears not upshifting TC locking and unlocking randomly (sometimes manually shifting solved the shifting issues). got to where i was going turned it off. when i left it drove fine shifting when it should hav the TC locked up like it should. then once i hit about 60 the TC unlocked then relocked a couple times then settled in. as i came to a red light and took m foot off the gas the truck slowed down with the TC unlocked then the TC locked back up then unlocked.

What could the problem be? bad solenoid pack? bad TC? something else? i'm not against rebuilding the trans if i have to, but if there is another idea i'm all for it.

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #2 of 22 Old 05-11-2012, 11:33 AM
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i have no clue terry and my truck has similar issues with it shifting early, and late sometimes but it doesnt unlock abnormally or anything else

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post #3 of 22 Old 05-11-2012, 12:17 PM
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With the converter locking in and out, I'd suspect the lockup solenoid, and or a connection in that circuit.

Will

97 F350 Crew Cab, 5sp 7.3L
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post #4 of 22 Old 05-11-2012, 12:29 PM Thread Starter
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i'm thinking eat the 280ish dollars for a new solenoid pack and see if that helps. but before that i am going to pull the trans harness and inspect it very closely

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #5 of 22 Old 05-11-2012, 01:04 PM
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Good call, check it real close, especially the connections on the outside.

Will

97 F350 Crew Cab, 5sp 7.3L
Toyo Open Country M/T's 285's
Magnaflow SS 4"
3" DP
Rosewood Stage 1's.
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post #6 of 22 Old 05-11-2012, 01:45 PM
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Originally Posted by terryknight View Post
i'm thinking eat the 280ish dollars for a new solenoid pack and see if that helps. but before that i am going to pull the trans harness and inspect it very closely
Eat it, then you know that is covered, would really suck, alot, to get it rebuilt and have a bad solenoid pack still

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post #7 of 22 Old 05-11-2012, 02:45 PM
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Sounds like it could be a solenoid issue. It could also be the pump. OD flash means you are going into limp which increases line pressure, thus the hard shifts. Whens the last time you changed the filter and flushed the cooler?

Agreed on replacing the solenoid pack. Most quaility Trans builders would replace that anyway on a rebuild.

Also check your harness over really good. Just on frayed wire shorting on the Trans or frame could be the issue. My Buddie had his connector lossen up and had som water get in the solenoid socket which caused the same symptoms.





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post #8 of 22 Old 05-11-2012, 04:47 PM
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Im gonna jump on the bandwagon and say solenoid pack as well. Its the most common problem in the transmissions besides the TC. TC's usually will shudder before they die, or just flat out QUIT.

Your shifting strange has nothing to do with the TC.

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post #9 of 22 Old 05-11-2012, 05:06 PM Thread Starter
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so i have two? problems? or you're saying the TC lock/unlock also has to do with the solenoid pack?

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #10 of 22 Old 05-11-2012, 05:14 PM
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so i have two? problems? or you're saying the TC lock/unlock also has to do with the solenoid pack?
Yes there is a lockup solenoid.

Will

97 F350 Crew Cab, 5sp 7.3L
Toyo Open Country M/T's 285's
Magnaflow SS 4"
3" DP
Rosewood Stage 1's.
TS 6POS Chip, PHP tunes
T500
E-Fuel
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