It's only been a 1.55 on a 125 shot but the new trans, converter and some suspension should drop it some.

It won't seat in the flexplate but they make a spacer to solve the problem. I didn't run it with my old converter but PTC custom built my new nitrous one specific to my setup(including a extended pilot).

 

How many of you guys are running the th 400 and what are your track times? my buddy went to wyo tech and tells me I would run slower if I ran a th 400? is this true from my M6? Cause I want the power but definatley dont want to go slower......

 

yo buddys a fool... your th400 will eat up more power, yes... but your will be 10x more consistent than any 6 speed...

 

second that nobody can shift better than an auto

 

I also have a few questions what are all the nessacary parts to complete the install from m-6 to T-400 I know I know theres a sticky but its so spread out. I want to do it the right way

 

So, it wont eat up ET. right???

 

OK can someone make a list here, am thinking of doing the same thing! Here is my attempt somebody correct me if am wrong or add anything that is missing.

1. New or Used Flexplate,
2. LSx specific torque converter (which means longer pilot bearing?)
3. Any th400 or th350, If using th350 get the one with the 9 inch tailshaft so you can resuse you stock driveshaft.
4. New chassis mounted torque arm
5. New Shifter and maybe console.
6. New big tranny oil cooler
7. Some speedo and abs light removal mods

Anything else guys?

 

The link dlove posted is very helpful

https://ls1tech.com/forums/automatic-transmission/815618-th350-th400-frequently-asked-questions.html

 

your ET will drop and im guessing along with a few MPH's...

 

I have a thread somewhere around here....try a search T-56 to TH-400
Don

 

You are out of colorado right man, I think I met you at pinks all out...

 

Quick 98 ring a bell?

 

O yes you sexy devil I met you at pinks i was with Chad in the Jeep when we drove up and met you, I work at bandimere for the past 7 years and knew that car was fast. I just needed to match a face to the car

So you think there would be real no ET loss switching to a TH 400 application cause people I have be around tell me it is not worth it unless i am using a trans brake....?

 

When I had a Th400 in my TA, it slowed down .1-.2 tenths and lost 4-5mph in the 1/8 mile. This was launching off the foot brake. I did read somewhere on this forum that using a transbrake would gain maybe .2-.3 But I can't support that with any of my experience.

 

Thanks man thats what I was woundering...