Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

Need help th400 install in a 97 LT1 firebird

Old May 9, 2010 | 11:01 AM
  #1  
SPRAYED Z's Avatar
Thread Starter
TECH Apprentice
iTrader: (4)
 
Joined: Jul 2009
Posts: 360
Likes: 0
Default Need help th400 install in a 97 LT1 firebird

What is needed for the install?

I have the trans, cooler and lines that I can make up for the car.

Can I reuse my stock crossmember a4 for the conversion?

ITs a short tail shaft trans, Can I reuse my stock driveshaft?

What converter will I need to get a sbc standard or does it have to be lt1 specific?

What shifters fit in the stock console, pics and part numbers would be great?

thanks and hope this helps and you can help me
Reply
Old May 9, 2010 | 11:09 AM
  #2  
Wicked94Z's Avatar
10 Second Club
iTrader: (26)
 
Joined: Jul 2005
Posts: 3,725
Likes: 1
From: Spokane, Wa
Default

need an aftermarket, or 6 speed crossmember.

you need a new driveshaft

converter should be a standard sbc

I'm going with either a cheetah or stealth ratchet shift, not using my old console though.
Reply
Old May 9, 2010 | 11:17 PM
  #3  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

Originally Posted by Wicked94Z
need an aftermarket, or 6 speed crossmember.

you need a new driveshaft

converter should be a standard sbc

I'm going with either a cheetah or stealth ratchet shift, not using my old console though.
Yep same as above, the 6 speed crossmemeber can be used But I think you need to shim it a bit and move it back like 2 inches further? Im sure someone will chime in and let you know for sure.
Reply
Old May 9, 2010 | 11:31 PM
  #4  
SuperSlow02's Avatar
11 Second Club
iTrader: (16)
 
Joined: Feb 2006
Posts: 1,865
Likes: 0
From: Cape Girardeau, MO
Default

If its the same as LS1 mounts, all you have to do is add a 1x1 square tube as a shime
Reply
Old May 9, 2010 | 11:33 PM
  #5  
johnrobbins's Avatar
Staging Lane
 
Joined: May 2010
Posts: 53
Likes: 0
From: augusta, maine
Default

ive used a 6speed crossmember in the past for the conversion, but i did have to shim it a little.
Reply
Old May 12, 2010 | 09:07 PM
  #6  
SPRAYED Z's Avatar
Thread Starter
TECH Apprentice
iTrader: (4)
 
Joined: Jul 2009
Posts: 360
Likes: 0
Default

anything else that I need to know.

What about the driveshaft? length? for a stock 10 bolt
Reply
Old May 13, 2010 | 06:35 AM
  #7  
SuperSlow02's Avatar
11 Second Club
iTrader: (16)
 
Joined: Feb 2006
Posts: 1,865
Likes: 0
From: Cape Girardeau, MO
Default

No the th400 is much shorter. Custon drive shaft
Reply
Old May 15, 2010 | 11:33 AM
  #8  
SS MPSTR's Avatar
11 Second Club
iTrader: (1)
 
Joined: Jun 2003
Posts: 1,510
Likes: 1
From: SoCal
Default

Originally Posted by Wicked94Z
need an aftermarket, or 6 speed crossmember.

you need a new driveshaft

converter should be a standard sbc

I'm going with either a cheetah or stealth ratchet shift, not using my old console though.
I'm using the Cheetah, and what a nice unit it is.
Reply
Old May 15, 2010 | 11:39 AM
  #9  
demonpixel's Avatar
TECH Resident
20 Year Member
iTrader: (19)
 
Joined: Jun 2005
Posts: 755
Likes: 0
From: Los Angeles, CA (Burbank)
Default

a friend of mine has an LT1, he was wondering if you needed a spacer if you're using an sbc converter like the Hughes spacer for the LS1 crank, or does the sbc converter sit in the back of the LT1 crank without any problems?
Reply
Old May 16, 2010 | 09:21 AM
  #10  
sschevyss's Avatar
Staging Lane
 
Joined: Jan 2010
Posts: 68
Likes: 0
Default

Driveshaft was mentioned but you'll need Yoke as well.
Reply
Old May 16, 2010 | 10:43 PM
  #11  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

Originally Posted by sschevyss
Driveshaft was mentioned but you'll need Yoke as well.
Why wont the yoke on the 400 work? I coulda sworn peeps all over use a stock tailshaft yoke on their f body.
Reply
Old May 16, 2010 | 11:05 PM
  #12  
Wicked94Z's Avatar
10 Second Club
iTrader: (26)
 
Joined: Jul 2005
Posts: 3,725
Likes: 1
From: Spokane, Wa
Default

Originally Posted by SS MPSTR
I'm using the Cheetah, and what a nice unit it is.
Well, I liked the cheetah that robs ss has, but I decided a rachet shifter would be cool, so I got the stealth pro ratchet. I like the feeling of it so far on the bench, I'll probably be throwing it in the car tomorrow.


Originally Posted by robsquikz28
Why wont the yoke on the 400 work? I coulda sworn peeps all over use a stock tailshaft yoke on their f body.
no.... th400 uses a different yoke.
Reply
Old May 18, 2010 | 01:47 AM
  #13  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

interesting, so what yoke do you need then?
Reply
Old May 18, 2010 | 03:22 AM
  #14  
Wicked94Z's Avatar
10 Second Club
iTrader: (26)
 
Joined: Jul 2005
Posts: 3,725
Likes: 1
From: Spokane, Wa
Default

a th400 yoke! lol

http://www.jegs.com/i/TCI/890/965350/10002/-1
Reply
Old May 18, 2010 | 07:45 AM
  #15  
sschevyss's Avatar
Staging Lane
 
Joined: Jan 2010
Posts: 68
Likes: 0
Default

What tranny is in your LT1 4L60?
Originally Posted by robsquikz28
Why wont the yoke on the 400 work? I coulda sworn peeps all over use a stock tailshaft yoke on their f body.
Not famaliar with Fbodies but I did grow up on small blocks and played with many 200's 400's and 350's and one thing that is always a problem is that damn 400 yoke. I believe the splines are spaced further an the actual shaft that slides onto the main shaft is larger than majority of other yokes. Check the 12th post this link.
https://ls1tech.com/forums/conversio...available.html

Originally Posted by robsquikz28
interesting, so what yoke do you need then?
You could get either your 400 yoke in a bolt on style or fixed to driveshaft style if you have driveshaft made.
Reply
Old May 18, 2010 | 12:39 PM
  #16  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

OK, cuz all I remember is th400s with yokes already on them and I grew up with old school hotrods. So I was too wondering how the driveshaft would fit when the th400 has a bolt on style yoke. You then can just get a custom driveshaft and bolt up to the yoke and the differential then huh?
Reply
Old May 18, 2010 | 03:11 PM
  #17  
sschevyss's Avatar
Staging Lane
 
Joined: Jan 2010
Posts: 68
Likes: 0
Default

Originally Posted by robsquikz28
OK, cuz all I remember is th400s with yokes already on them and I grew up with old school hotrods. So I was too wondering how the driveshaft would fit when the th400 has a bolt on style yoke. You then can just get a custom driveshaft and bolt up to the yoke and the differential then huh?
Correct. What tranny did your camaro have in it?
Reply
Old May 20, 2010 | 02:59 AM
  #18  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

mine stock 4l60e? But what would be needed for a 400 swap then with that yoke.
Reply
Old May 21, 2010 | 08:53 PM
  #19  
Wicked94Z's Avatar
10 Second Club
iTrader: (26)
 
Joined: Jul 2005
Posts: 3,725
Likes: 1
From: Spokane, Wa
Default

there's a guy on yellow bullet selling a th400/9" shaft, the yoke was modified by denny's for a bolt on yoke TH400. fire67 i think is his name.
Reply
Old May 22, 2010 | 07:19 AM
  #20  
sschevyss's Avatar
Staging Lane
 
Joined: Jan 2010
Posts: 68
Likes: 0
Default

Originally Posted by robsquikz28
mine stock 4l60e? But what would be needed for a 400 swap then with that yoke.
Wish I knew. I am not famaliar with the specifics of your vehicle. What are you building this for just a daily driver or an all out car your willing to have a drive shaft made?
Reply

Thread Tools
Search this Thread

All times are GMT -5. The time now is 03:33 PM.