Question about 1990 Ford F150

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I have a 90f-150 and i just had the torque converter rebuilt 8 months ago and now it shift hard when changed into 1 gear what is the problem with ford transmissions.

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  • adrianr1 Nov 09, 2010

    it's a automatic transmission not a manual

  • adrianr1 Nov 09, 2010

    this is a automatic transmission i was inquiring about when it shifts into 1st gear it jerks and you have to press on the gas pedal for it to go.

  • adrianr1 Nov 12, 2010

    yes thank you.

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This sounds like the problem is still in the torque converter. It sounds like the torque converter is locking up too early. And causing the jerking. It also could be the PCM. But if the torque converter has been a problem then I would look there first. Take the truck back to the company that rebuilt the torque converter and have them repair the problem.

Posted on Nov 09, 2010

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Hi, i suggest you check the fluid level of the transmission first. Remove the fill plug, and see if it is Below the proper level. Do Not fill at this time! There is a reason for this. Then I would suggest draining the fluid. You are also looking for brass fragments in the fluid. Drain into a three quart metal, or plastic drain pan. (They are approximately 18 inches across, and 4 inches deep)
Manual transmissions use Synchronizer's made of a brass alloy. The synchronizers have tapered teeth, that the nose of the teeth can be worn down. Also a tapered surface on the synchronizer, that can be worn down. Brass fragments in the transmission fluid is a sign of this wear. Some brass 'dust' will occur as normal wear. A large accumulation means you have problems. Transmission is hard to shift, is one of those symptoms due to this.

Summation? 1.Low fluid will cause hard shifting. It will also cause abnormally high wear of the synchronizer rings, (Synchronizer Rings are also referred to as 'Blocker Rings')
2.Worn Synchronizer Rings, Broken or worn Detent 'buttons', Broken Detent Springs, and worn Synchronizer Hub's, will cause hard shifting.
Should you not have an abnormal amount of brass shavings in your transmission fluid, and found the fluid to be low, you may want to just replace the fluid to the proper level, and see if this works first.
If so, I suggest contacting your Ford dealer, and see what the proper transmission fluid is for YOUR Ford. They will go by THE transmission is used in your truck, and will have any updates if better fluid has been developed since your truck was made.
I know dealers are expensive to buy from sometimes, but I implore you to use the transmission fluid they recommend. It will have special additives.

Posted on Nov 08, 2010

  • Tunde Autos
    Tunde Autos Nov 09, 2010

    The transmission bands need to be adjusted, as they have worn a bit.A quick $80.00 should cover it.

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I loked at JC Whitney just a few minutes ago and it cost about 100 bucks. here it is
HIGH-PERFORMANCE SUPER STREET TORQUE CONVERTERS
For GM and Ford vehicles.

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