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Old 09-10-2007, 09:39 PM
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700R4 Problems only has rev.&1st

I have a 1984 Chevy Silverado, 305, 700R4. The tranny has reverse, and when driving, 1st gear is the only gear. It shifts from 1st to nuetral.
I understand that this a weak transmission off the get-go.
Does anyone may know what causes this, and also what 4l60 can I put into this truck with little modifications? I got the truck in this condition.
Thank You

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Old 09-10-2007, 10:33 PM
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Quote:
Originally Posted by chevy_2007
I have a 1984 Chevy Silverado, 305, 700R4. The tranny has reverse, and when driving, 1st gear is the only gear. It shifts from 1st to nuetral.
I understand that this a weak transmission off the get-go.
Does anyone may know what causes this, and also what 4l60 can I put into this truck with little modifications? I got the truck in this condition.
Thank You
The 700r4 is weak if stock...if you get a good rebuild kit..the 700r4 will do the job and save you gas in the long run.just i would put all new thrust washers,backing plates,bearings...my 1st rebuild was a 700r4 it was easy but i was told i didn't need these parts well the trans shop was wrong.....$200.00 gone..rebuilt it the 2nd time i changed any parts that i thought might be bad...the 700r4 is still in my buddies truck.....the 4l60e is a up grade from 700r4. what do you use the truck for?
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Old 09-10-2007, 10:48 PM
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It will be used for transportation, no pulling trailers. Local drives only.
I've never rebuilt a trans before, using a video from ATSG, what would the difficulty level be? I'm mechanically inclined, and also pay attention to details.

Last edited by chevy_2007; 09-10-2007 at 10:55 PM.
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Old 09-10-2007, 11:17 PM
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Quote:
Originally Posted by chevy_2007
It will be used for transportation, no pulling trailers. Local drives only.
I've never rebuilt a trans before, using a video from ATSG, what would the difficulty level be? I'm mechanically inclined, and also pay attention to details.
I used a haynes tech book#10360 it covers the 700r4 but there is 3 types of 700r4 just see if your tran is a k if so your good to go. the turbine shaft oil seal rings HAVE to be put on with a tool ..i would take it to a shop just make sure they use the right tool...if the seals are not right it will be a waste of your time.the book will help you ,just take your time. that 700r4 was my first..if you need help let me know!
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Old 09-11-2007, 01:35 PM
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Quote:
Originally Posted by chevy_2007
I have a 1984 Chevy Silverado, 305, 700R4. The tranny has reverse, and when driving, 1st gear is the only gear. It shifts from 1st to nuetral.
I understand that this a weak transmission off the get-go.
Does anyone may know what causes this, and also what 4l60 can I put into this truck with little modifications? I got the truck in this condition.
Thank You

What is the history of this trans? Mileage , recent repair or service?



If this trans is going to neutral while in first gear, there is a problem with the forward clutch or roller sprag....

When this trans shifts to 2nd gear a band comes on and the forward clutch stays applied.

You could have a broken accumilator for 2nd gear and it blows off pressure... then the trans acts like it goes to neutral.

Many items could be the problem here.

A later 700 / 4L60 will bolt into the truck. The lock up wire harness would need to be addressed for proper operation of the converter clutch.

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