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Old 03-13-2009, 10:04 AM
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700r4 or turbo 400

I know there is a lots of threads about this already, but I am going to ask anyway. I don't like the 700r4s because I haven't had good luck w/ them on high performance applications, but I am not sure that I have had a well built one to do a good comparison on. So my main question is there a 700r4 out there that anyone has tried that works well, if not I think I will swap w/ a turbo 400. any input would be helpfull. It is going in an 85 chevy 4x4 406ci 1/2ton (np208 I think) this truck is a toy so gas mileage is not so much an isue, woried more about keeping it simple and better bang for buck.

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Old 03-14-2009, 03:15 PM
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hi there

well '87 and up 700r4 are the good ones and the best you can have as far as the 700's go

but 82 to 84 are the worst of them all by far.

th400 will require different trans case adapter and so on because the 400's are 32 spline output- unlike all the others( except 4 speed top loader 465 and 420 and 435 and such before '83) that are 10 spline

'83-up the 4 speed 4x4 were changed to 32 spline like the 400's are(just for trivial info purposes only)

what do you have right now ?

Last edited by fast68; 03-19-2009 at 06:39 AM.
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