TH400 to700R4 swapdriveshaft question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 K20 · 04-15-2015, 09:18 PM

Hi every body !! I have a question !!
I have a 72 C20 with a big block ,,, I am swapping the big block out for a small block. The truck has a TH400 in it now and I am putting in a 700R4.

My question :
If I install the small block frame mounts in the stock location will the original driveshaft from the TH400 work with the 700R4 ?

Thank you in advance for any and all information !!!

Have a great day !
Tom

04-15-2015, 09:18 PM	#1
72 K20 Registered User Join Date: Mar 2011 Location: Brandon,Iowa Posts: 391	TH400 to700R4 swapdriveshaft question Hi every body !! I have a question !! I have a 72 C20 with a big block ,,, I am swapping the big block out for a small block. The truck has a TH400 in it now and I am putting in a 700R4. My question : If I install the small block frame mounts in the stock location will the original driveshaft from the TH400 work with the 700R4 ? Thank you in advance for any and all information !!! Have a great day ! Tom



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