400 turbo in a 98 t/a?

**heath26** · 12-02-2009, 06:15 PM

thinking about putting a 400 in my t/a tired of smokin 3 and 4 in this weak ass 4l60. i have rebuilt it 3 times and the last time i put everything you can get in it. just wondering how much custom work it will take to install 400

**c5z28** · 12-02-2009, 06:33 PM

People install th400's in there cars no problem, just a few pieces that have to convert over that I don't the specifics on.

**JaycenK** · 12-02-2009, 07:49 PM

Originally Posted by heath26

thinking about putting a 400 in my t/a tired of smokin 3 and 4 in this weak ass 4l60. i have rebuilt it 3 times and the last time i put everything you can get in it. just wondering how much custom work it will take to install 400

What are you breaking and what do you use it for?

**heath26** · 12-03-2009, 05:55 PM

never taken it to the strip but lots of petal to the floor,what can i say i love the feeling of being pushed back in the seat. clutch packs,bands,sunsheel,valve body,tail shaft housing. they usually last about 5000 to 1oooo miles then the slip starts

**JaycenK** · 12-03-2009, 06:24 PM

You will loose over drive if you go the th400 rout. They are tough. For street use the 4l80e might be tough enough for you though

**Hi-Po** · 12-03-2009, 06:33 PM

I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please

A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.

**JaycenK** · 12-04-2009, 07:51 AM

Originally Posted by Hi-Po

I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please

A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.

Yup very true. Ok so back to the original question what all is involved cuase I have not done one personally.

**JaycenK** · 12-04-2009, 07:52 AM

Also to the Original poster, are you running a stock rear?

**Hi-Po** · 12-04-2009, 06:09 PM

Well, I have not done it either. I have read up on the topic for hours as I am always tossing around the idea of kicking the M6. I dont know where else to get this information but these threads. OP, start reading

http://www.ls1tech.com/forums/automa...th400-faq.html

http://www.ls1tech.com/forums/automa...g-diagram.html

http://www.ls1tech.com/forums/automa...questions.html

**heath26** · 12-05-2009, 05:52 PM

the 4l80 wont fit without major mods of chassis it much bigger i have checked into that. my rearend is stock housing but the guts are moser and a moser 9 inch setup is next if i can stop throwing money down the tranny

**JaycenK** · 12-06-2009, 06:20 PM

Yea good idea, cause as soon as you stop breaking the trans that rear is bound to have some problems.

**wheeliE-maxx** · 12-18-2009, 06:13 AM

Originally Posted by Hi-Po

I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please

A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.

Yep, you have to run a seperate trans computer too. A 3-speed is the way to go if it's not a daily driver for sure.

**Smittro** · 12-18-2009, 07:36 AM

The 4l80E and the turbo Hydromatic 400 share some of the same internals too.. Just thought I'd add my .02..

**wheeliE-maxx** · 12-18-2009, 09:20 AM

Why don't people run th350's? Is the length of the 400 similar to the 4l60e? I know the 700r4/4l60e is longer than the th350/200-4r length. The 400 sucks a good bit of power out compared to the 350

**67CamaroRSSS** · 12-18-2009, 06:09 PM

Originally Posted by wheeliE-maxx

Why don't people run th350's? Is the length of the 400 similar to the 4l60e? I know the 700r4/4l60e is longer than the th350/200-4r length. The 400 sucks a good bit of power out compared to the 350

TH400 with a trans brake is the only tranny my buddy could get to work (and not break) behind his 9 second 347 turbo car.

800+ hp and 750 lbs/ft torque tends to put a hurting on 4L60E's no matter how you build it.

**wheeliE-maxx** · 12-23-2009, 02:34 AM

Oh, no questions on why not use a 4l60e. Dey shit. But people with fairly mild street cars, a th350 weighs less and saps a good bit less power than a th400