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02-01-2008, 12:14 AM
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#1 |
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Registered User
Join Date: Feb 2007
Location: MI
Posts: 214
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Th400+ Np205
I am looking for a Adapter selve to take a large out put shaft from a 400 tubo hydromatic and link it to the Np 205 on my 72 chevy.
How much longer is the TH400 than the Th 350. I think its only 2 inches longer but I could be wrong. What else is nessecary to do the swap. I will be pushing the motor mounts forward to get clearance for my BBC. Anyone try swaping a TH400 with a small block. Am I in for a surprise? Thanks |
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02-01-2008, 02:16 AM
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#2 |
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I do everything twice, so what
Join Date: Mar 2004
Location: To the Right. One may go as far to say WAY to the Right
Posts: 378
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Re: Th400+ Np205
If the th350 is mated with the currect 205. I think you need a different adaptor and you need to change the input shaft on the 205
__________________
www.hilbillytruckpulling.com |
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02-01-2008, 02:51 AM
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#3 |
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Registered User
Join Date: Sep 2006
Location: New Haven, MO
Posts: 1,243
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Re: Th400+ Np205
A NP205 behind a turbo 350 has a 27 spline count. A NP205 behind a th400 has a 32 spline count.
__________________
-Lincoln 1987 GMC S15 (soon to be a chevy clone)  2.5l, 4 speed, no ps, no pb, no ac Silence is golden, but duct tape is silver.  Spoken by Cletus the hillbilly I like stickers... a whole bunch. |
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02-02-2008, 10:34 PM
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#4 |
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Everything is work in progress
 
Join Date: Apr 2006
Location: Denver Colorado
Posts: 326
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Re: Th400+ Np205
You can fine the chevy cast th400/ 205 adapter on ebay, but you'll pay $150 to $200.
Look in the boneyard for one
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Good luck with your truck! How much?! It's just an old truck part!! 49 International on a 80 GMC 3/4ton 4x4 chassis 48 International KB-5 2 ton dump bed 04 Honda CRF "500" 09 Honda CRF450 fuel injected rocket 03 Suzuki hayabusa carbonfiber wheeled monster. 02 Ford diesel stretch van (toy hauler) 01 38' Monaco diesel pusher motorhome |
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