Automatic conversion help

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Bsoninja84

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Dave
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1984
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1500
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250 4.1
Id like to put an automatic transmisson in my truck. Im not sure what transmisson to buy my truck is a 1984 1/2 ton with an inline 6 4.1 what trans is best? What did these come with stock?
 

1987 GMC Jimmy

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Id like to put an automatic transmisson in my truck. Im not sure what transmisson to buy my truck is a 1984 1/2 ton with an inline 6 4.1 what trans is best? What did these come with stock?

You could do a 700R4. I think that would work well with your six banger. I'm not completely sure if you could get a 700R4 optioned with the six cylinder, but the only other option would have been a TH350 three speed. The 700R4 is four speed overdrive so your truck would cruise well.
 

HotRodPC

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Turbo 350 or 700r4 as stated. I'd let me rear end gear ratio decide that. If I were 3.42's or higher, I'd go 700r4. If It were 3.08 on down I'd go Turbo 350.
 

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