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Old 06-02-2011, 11:39 AM   #1
TWINRAY
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Default Engine and TH400 install

Hi all

I've heard that you DO NOT install the engine and trans back into the car as a complete unit. This was my idea as I figured it would be much easier to do the measuring of the torque converter/flexplate desired gap with these out of the car that the alternative of me doing this on my back - then having to take the transmission out (again), bolt up the TQ and then reinstall the transmission. I have the complete front end off the car so the installation angle of the complete package isn't too extreme. I took both out together and it wasn't a big deal. So, question being, can I put the engine and drivetrain back in as 1 unit?

Thanks, Fred

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Old 06-02-2011, 11:41 AM   #2
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Of course you can.
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Old 06-02-2011, 11:50 AM   #3
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Well, that's what I thought too but that was the advice given to me by a noted rebuilder in my area. Guess I should have asked more questions "why not" but didn't want to seem to get him pissed off
Thanks
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Old 06-02-2011, 12:37 PM   #4
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I install them together as a unit also. Don't add the trans fluid until after it's in & the drive shaft is installed unless you have the appropriate plug.

Jim
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Old 06-06-2011, 11:23 AM   #5
TWINRAY
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Quote:
Originally Posted by 70BBvert View Post
I install them together as a unit also. Don't add the trans fluid until after it's in & the drive shaft is installed unless you have the appropriate plug.

Jim
10-4 Thanks
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Old 07-14-2011, 10:14 AM   #6
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Finally brought the TH400 in for a rebuild. Only took me 7 months to decide on a shop.

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Old 07-14-2011, 10:26 AM   #7
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will you have to modify the length of the driveshaft to accomodate the 400?
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Old 07-14-2011, 10:45 AM   #8
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The TH400 is original to the car.
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Old 07-14-2011, 10:52 AM   #9
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I see. I'm putting a 400 in mine and a 700r4 came out of it (previous owner) so I was wondering if the driveshaft length would have to change.
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Old 07-21-2011, 10:25 AM   #10
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Brought the trans to Select Performance in West Babylon. Good folks. Thanks to them for taking the time to go over the install. Picked it up yesterday along with a new converter. They said the internals were pretty well used up. Now with my recently received Paragon order, maybe I can start some assembly on this project.




Last edited by TWINRAY; 07-21-2011 at 11:25 AM.
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Old 07-21-2011, 11:05 AM   #11
jackson
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looks like an orange zz4
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Old 07-21-2011, 02:06 PM   #12
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You'll enjoy running that combo down the ole boulevard. Thanks for keeping us posted.
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Old 07-26-2011, 07:44 PM   #13
68/70Vette
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Quote:
Originally Posted by jackson View Post
looks like an orange zz4
My ZZ4 came painted black from the factory, but as it aged before I could get it in the car, it turned orange.

FYI: The T400's transmission output yokes came sized for 1330 u-joints. A 1330 u joint spider is 3 5/8 inch wide with 1 1/16 inch caps.
Prior year driveshafts where sized for 1310 u joints. a 1310 u-joint is 3 7/32 inches wide with 1 1/16 inch caps. When people add a T400 to a prior year, and want to use their standard driveshaft, they have to buy a 1330/1310 U joint spider to mate the T400 to the stock driveshaft. I don't know if GM changed the driveshafts from 1310 to 1330 when they started installing the T400. Anyhow, just a comment.
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Old 07-26-2011, 07:44 PM
 
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