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TH 400 install from an m-6?????????

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Old Sep 9, 2007 | 07:49 AM
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Default TH 400 install from an m-6?????????

I did not have time to read all of the sticky because it is just full of questions and not a lot of good writeups. Anyway. I have a TH 400 with a vig converter. I also bought a 98 flexplate with a spacer. I have a tranny mount from a 4l60e. I need a shifter.

I am new to automatics so here are my questions.

First of all, Will this work?

Do I need the spacer on the flexplate?

Will the trans mount work?

What kind of shifter? cheap?

I dont care about the speedo so I dont need to know how to install one.


How to install converter?

Will the stock m-6 driveshaft work? I have a 10 bolt rear.

Thanks for any of your input.
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Old Sep 10, 2007 | 01:44 AM
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Of course it will work, its not a hard swap.

You will need a converter matched to the LS1 motor, the pilot needs to be longer to engage with the crank. I don't mess with LS1s too much so someone correct me if I am wrong.

The transmission mount will work but have you thought about how your going to connect the torque arm? I suggest the BMR TH400 transmission crossmember with TA relocation. This piece will solve alot of issues.

I use a B&M Pro Stick shifter. Not real expensive and a quality product. Have you thought about what you are going to do with the big hole in your trans tunnel? going to have to cover that up plus your shifter is going to mount to it.

The stock DS will not work, your going to have to have a custom one made.

This is a great conversion for a weekend warrior street/strip car. I would not reccomend it for a daily driver though unless you run like a 2.73 gear.
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Old Sep 10, 2007 | 10:05 AM
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Any questions you have regarding our torque arm relocation bracket please feel free to ask.

http://www.bmrfabrication.com/F-bodyChassis.htm

Lee Spicher
lee@bmrfabrication.com
(813)986-9302
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Old Sep 10, 2007 | 05:33 PM
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Originally Posted by BMR Fabrication Inc.
Any questions you have regarding our torque arm relocation bracket please feel free to ask.

http://www.bmrfabrication.com/F-bodyChassis.htm

Lee Spicher
lee@bmrfabrication.com
(813)986-9302
I had one of the torque arm relocation crossmembers when I swapped over to the TH400, it is an awesome piece.
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Old Sep 11, 2007 | 07:40 AM
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thanks for the info guys.
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Old Jul 20, 2008 | 11:52 AM
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Do you have any pics of the th 400 going in or mounted up???
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Old Jul 22, 2008 | 02:18 PM
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https://ls1tech.com/forums/automatic-transmission/815618-th350-th400-frequently-asked-questions.html
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Old Jul 24, 2008 | 10:04 PM
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dude you are a bad *** and thanks I am going to hit the f quick up...
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Old Jul 25, 2008 | 09:32 AM
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You can also get a TCI flexplate so you don't have to spend the money for a LS specific converter
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Old Jul 25, 2008 | 03:51 PM
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I went with a billet flex plate by meziere but it was $$$
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Old Aug 4, 2008 | 09:07 AM
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Your F Quick is amazing
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Old Aug 4, 2008 | 09:08 AM
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Originally Posted by Z28/2002
You can also get a TCI flexplate so you don't have to spend the money for a LS specific converter
Do you have a link for that flex plate and convetor???
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Old Aug 4, 2008 | 09:08 AM
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Originally Posted by Z28/2002
You can also get a TCI flexplate so you don't have to spend the money for a LS specific converter
Originally Posted by XpEdItIoUs
I went with a billet flex plate by meziere but it was $$$
How do you guys like having a th 400???
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Old Aug 4, 2008 | 09:31 AM
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Here is a link to the Flexplate. With it you can run any TH400 converter

http://www.speedinc.com/cont.cfm?cid=C0000125



I have a TH350 and love it
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Old Aug 4, 2008 | 03:20 PM
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Originally Posted by 99Ls1fever
How do you guys like having a th 400???
I love it, Here is the link to the Meziere True Billet Flexplate. It's one peice (No welds to break)
http://www.byunspeed.com/product_inf...40ff1ebb1d5b95
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Old Aug 4, 2008 | 04:19 PM
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Originally Posted by Z28/2002
Here is a link to the Flexplate. With it you can run any TH400 converter

http://www.speedinc.com/cont.cfm?cid=C0000125



I have a TH350 and love it
Thanks Man

How is your sixty foot???
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Old Aug 4, 2008 | 04:21 PM
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Originally Posted by XpEdItIoUs
I love it, Here is the link to the Meziere True Billet Flexplate. It's one peice (No welds to break)
http://www.byunspeed.com/product_inf...40ff1ebb1d5b95
Ouch thats a lot of dough.... what is your sixty foot with your th 400?
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Old Aug 4, 2008 | 04:41 PM
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I am really liking my th400. I'm really happy I upgraded from the th350, and I still need to figure out why I cracked the case on my th350 and get the thing rebuilt as a backup. My best 60' is a 1.45 but I have a lot more to go on it.
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Old Aug 4, 2008 | 07:40 PM
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Originally Posted by 99Ls1fever
Ouch thats a lot of dough.... what is your sixty foot with your th 400?
I havn't taken it to the track yet.
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Old Aug 5, 2008 | 05:58 AM
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Originally Posted by Z28/2002
You can also get a TCI flexplate so you don't have to spend the money for a LS specific converter
If you ran the TCI flexplate.

Wouldn't the pilot on the SBC turbo 400 converter still
be off or not the same for use on an LS1?
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