Big Block Transmission - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gsharp · 03-19-2021, 06:46 AM

I'm running a BBC 454 with a TH400 transmission with the original rear end and 295/50R15 tires. It runs and drives great but it revs pretty high at 60 mph. I believe the factory gears are 3.73. I want to install an overdrive transmission but I've read that a 700R4 won't hold up to a slightly built 454. So I've looked into a 4L80E which would work great but then comes the issue of not having a controller. They want huge money for a stand alone or you can build some kind of homemade one. Anyone have any experience with this?

Thanks

Thanks

03-19-2021, 06:46 AM	#1
gsharp Registered User Join Date: Jul 2017 Location: Milan, Ohio Posts: 31	Big Block Transmission I'm running a BBC 454 with a TH400 transmission with the original rear end and 295/50R15 tires. It runs and drives great but it revs pretty high at 60 mph. I believe the factory gears are 3.73. I want to install an overdrive transmission but I've read that a 700R4 won't hold up to a slightly built 454. So I've looked into a 4L80E which would work great but then comes the issue of not having a controller. They want huge money for a stand alone or you can build some kind of homemade one. Anyone have any experience with this? Thanks Thanks



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