tranny swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71gmcfanatic · 04-27-2003, 12:55 AM

I currently have a turbo 350 in my truck but soon plan to swap to a turbo 400 because im going big block. My question is which Turbo 400 will be the easiest to swap in the place of my original t350? What will I need to do to swap from a t350 to a turbo 400?

Thanks

Longhorn Man · 04-27-2003, 03:24 PM

If your big block is stock, you can run a TH350 with no problems at all, even some big blocks with light mods push TH350 without killing them.
However, in reality, the 400 will last longer.
Are you aware that you'll probably have to convert to a high hump floor on your cab?

04-27-2003, 12:55 AM	#1
71gmcfanatic Registered User Join Date: Dec 2002 Location: Marysville, WA Posts: 101	tranny swap I currently have a turbo 350 in my truck but soon plan to swap to a turbo 400 because im going big block. My question is which Turbo 400 will be the easiest to swap in the place of my original t350? What will I need to do to swap from a t350 to a turbo 400? Thanks __________________ 1971 gmc 3/4 ton, 350, t350

04-27-2003, 03:24 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	If your big block is stock, you can run a TH350 with no problems at all, even some big blocks with light mods push TH350 without killing them. However, in reality, the 400 will last longer. Are you aware that you'll probably have to convert to a high hump floor on your cab?



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