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08-28-2020, 03:16 PM
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#1 |
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Registered User
Join Date: Oct 2012
Location: cedarown georgia
Posts: 9
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72 Chevy 4x4 auto 400 turbo
Can anyone help? I have a 72 Chevy 4x4 and want to install a 400 turbo. Some have said I have to move the cross member? Just would like to know what all is involved to install a 400 turbo in a 72 4x4. Any help would be appreciated. Thank you.
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08-28-2020, 04:40 PM
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#2 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: 72 Chevy 4x4 auto 400 turbo
I believe there are differences in the transfer case so the TH400 doesn't bolt directly to a NP205 that came with a TH350 in front of it.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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08-28-2020, 04:53 PM
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#3 | |
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Registered User
Join Date: Oct 2012
Location: cedarown georgia
Posts: 9
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Quote:
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08-28-2020, 05:35 PM
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#4 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,714
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Re: 72 Chevy 4x4 auto 400 turbo
The spline count on the output shaft is different on the TH400. You will need a different input gear on the NP205. You will have to move the cross member back. You will need to shorten the rear driveshaft and lengthen the front shaft.
This gets expensive and you need to really have a need/want to go through with this IMO>
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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08-28-2020, 09:26 PM
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#5 |
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All about them K’s
 
Join Date: Jun 2014
Location: Farmington, New Mexico
Posts: 6,238
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Re: 72 Chevy 4x4 auto 400 turbo
If you don’t have a turbo 400 or late style sm465 np205 you’ll have to machine the transfer case to accept the turbo 400 input bearing.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 
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08-28-2020, 10:14 PM
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#6 |
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Registered User
Join Date: Oct 2012
Location: cedarown georgia
Posts: 9
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Re: 72 Chevy 4x4 auto 400 turbo
I had no idea there was that much involved to make the 400 work. I would be better off money wise to use a th350 it sounds like.
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08-28-2020, 11:04 PM
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#7 | |
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Senior Member
 
Join Date: Jul 2015
Location: Fairfax, Missouri
Posts: 1,051
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Re: 72 Chevy 4x4 auto 400 turbo
Quote:
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08-28-2020, 11:29 PM
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#8 | |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,333
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Re: 72 Chevy 4x4 auto 400 turbo
Quote:
Yes , a kickdown switch. The '72 would be located on the accelerator pedal bracket, inside the cab. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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