SVT THIS

iTrader: (27)

I'm looking to get 450-500rwhp NA with my H/C setup spinning to 7k rpms. I will also spray a 150 shot at some point. I know the stock tranny hates huge power and high RPMs so I've begun planning a tranny swap as well. I'd like to see what my options would be for a good DD tranny. Does the TH400 have OD? Is the stock 4L80e tranny strong enough? Should I just go with a built 4L60e? I want something that will hold huge power and not restrict anything I may do in the future (ie more spray, FI, more cubes, etc etc). I'm not looking to spend a fortune here, but I do want to do it right ONE time. I want it to have good street manners and it needs to have OD. Throw your opinions at me!

natronathon

FLT stage 4 or 5

98NBMZ

iTrader: (6)

The TH400 does not have OD. It is a 3spd tranny.

IMO...you are looking way to high with what the numbers you are expecting.

SVT THIS

iTrader: (27)

Is that not a reasonable goal with full bolt ons, 90/90 and ET 215 heads and a TRex cam? Oh well, either way its going to be much more power than my tranny can handle. I saw a post on a stage 5 4L65e tranny (I think it was FLT)-would that be fine? Is it pretty much a bolt in replacement or would it require new mounts, etc?

GregWS6&z28

iTrader: (8)

id go with a built 4L80E, should give you what you're looking for

gettinthere

iTrader: (3)

I'm running an RPM Stage 5 4L60E and I wouldn't have it any other way. I've got the strength of a TH400 and an overdrive.

94greencamaro

iTrader: (8)

Yeah man, i would say your hp expectations are a bit high for just a t-rex, heads, and bolt ons. But i would recommend a built 4l60e from either rock-on or pro built. Your going to be spending around 2000, but it will hold the power and you will still have overdrive for the streets

GregWS6&z28

iTrader: (8)

i've got about $1700 into my built 4L60E with other upgraded 4L65E features and my builder swears I can throw all kinds of power to it with no problems. so agreed with the others, you can find a good built 60E to hold 500rwhp no questions asked

CrawlinWS6

iTrader: (41)

There is a company that sells an overdrive set-up for a th400. I sae it on hptv. Look around it does exist.

darrensls1

It was called gear vendors overdrive.

http://cgi.ebay.com/ebaymotors/NEW-G...spagenameZWDVW


There is one on ebay for $2395.00 (ouch)

strokedls1

iTrader: (1)

A built 60e will handle the power on motor, but if you plan to spray I would go with an 80e. There is no way a 60e is as strong as a th400. A th400 and a 80e are essentially the same beast. The 80e is an electronic version with an overdrive gear. I got sick of pulling the 60e after my fifth time in one year and went to a 80e. Haven't had a problem since. It does have a taller first, lower overdrive, heavier and eats up more power. It is fine with me to have the car running all the time though.

SVT THIS

iTrader: (27)

Is the stock 4L80e fine or do I need to have one built? I imagine since its a different tranny it'd be best to get a donor car with all the hardware-what car/truck did they come in?

eric01ss

iTrader: (13)

what there website

gettinthere

iTrader: (3)

I PM'd it to you b/c he's not a sponsor yet. If you need any references, come check out the Midwest forum on LS2. Most of us are running Rodney's transmissions.