Idea for Caddy 500 swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

neonlarry · 09-27-2002, 09:22 PM

I was just thinking that if you wanted to put a 500 in a 4x4, instead of using the adapter for a chevy tranny, in some of the old full size jeeps, they had a buick 350 with a TH400. Does anyone know if that would work? I want to build a 500 powered 4x4 someday, and I was just wondering if i came across one of those TH400s, if it would be worth using.

6869704X4 · 09-30-2002, 10:50 PM

I think so.

Duallie · 10-10-2002, 12:11 PM

Every time the Jeeps came with a THM400, a full-time Quadratrac transfercase was behind it. The Tcase took SPECIAL fluid, had some sort of torque converter in it, and had a chain drive. The THM400 output shaft was an odd Quadratrac-only deal, too.
Just take any everyday BOP transmission and put a 4x4 output shaft to match whatever Tcase you've got, the proper tranny-to-transfer adapter, and you're all set.

srhart71 · 10-10-2002, 10:35 PM

You might want to check and see if the tail area on a BOP T400 is the same as it is on the Chevy T400. I think it is. If so, you could mate it to a NP205.

09-27-2002, 09:22 PM	#1
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Idea for Caddy 500 swap I was just thinking that if you wanted to put a 500 in a 4x4, instead of using the adapter for a chevy tranny, in some of the old full size jeeps, they had a buick 350 with a TH400. Does anyone know if that would work? I want to build a 500 powered 4x4 someday, and I was just wondering if i came across one of those TH400s, if it would be worth using. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

09-30-2002, 10:50 PM	#2
6869704X4 Registered User Join Date: Jul 2002 Location: SE NM Posts: 769	I think so. __________________ The more I learn about women, the more I love my truck.

10-10-2002, 12:11 PM	#3
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	Every time the Jeeps came with a THM400, a full-time Quadratrac transfercase was behind it. The Tcase took SPECIAL fluid, had some sort of torque converter in it, and had a chain drive. The THM400 output shaft was an odd Quadratrac-only deal, too. Just take any everyday BOP transmission and put a 4x4 output shaft to match whatever Tcase you've got, the proper tranny-to-transfer adapter, and you're all set. __________________ Just as if I knew what I was doin'

10-10-2002, 10:35 PM	#4
srhart71 Registered User Join Date: Jul 2002 Location: China Grove, NC Posts: 147	You might want to check and see if the tail area on a BOP T400 is the same as it is on the Chevy T400. I think it is. If so, you could mate it to a NP205.



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