Thread: O/D Tranny for a BBC

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That is not true. A whole lot of it depends on what kind of HP the big block is pulling. A stock 700R4 should be good for a bit over 400 HP and can be modified to hold up to well over 600+. You can go to a parts yard like Pull-A-Part and buy a complete transmission/transfer case assembly from a Chevy 4X4 for around $200. It would bolt to the engine without the hassles of adapters and such. You can buy a kit that will let you operate a 700R4 without the use of a computer. You can even buy a "Built" 700R4 for around $1200 that is already set up for as much as you can throw at it, plug and play.
Most of it is going to be determined by your ability and desire to get it done. Is there even room for a big block in a Scout without major modifications? Then again, modifications are no big deal, it is all mind of matter. If you don't mind, it don't matter.

Originally Posted by Hurst01

That is not true. A whole lot of it depends on what kind of HP the big block is pulling. A stock 700R4 should be good for a bit over 400 HP and can be modified to hold up to well over 600+. You can go to a parts yard like Pull-A-Part and buy a complete transmission/transfer case assembly from a Chevy 4X4 for around $200. It would bolt to the engine without the hassles of adapters and such. You can buy a kit that will let you operate a 700R4 without the use of a computer. You can even buy a "Built" 700R4 for around $1200 that is already set up for as much as you can throw at it, plug and play.
Most of it is going to be determined by your ability and desire to get it done. Is there even room for a big block in a Scout without major modifications? Then again, modifications are no big deal, it is all mind of matter. If you don't mind, it don't matter.

I disagree. Every weak link you fix opens the next weak link in line to contend with.

You can even get the 300M billet shafts, then you have to worry about the input drum. Then you can get the new Sonnax drum with the bolt on retainer, but it is still a cast aluminum drum. We have built 100s of 700s and 4L6X transmissions and they flat out don't last. So in the end you will have at minimum 1500 in just parts in a 700 without labor or a converter and you are rolling the dice.



Now the way I would go is a 4L80E and have just a small amount more than a top of the line 700 and it will live just fine behind a 1000HP+ Big block.