6L80 to TH400 Swap
 

Well finally the day is here. Lethal Racing will pick up Whitey and start the next stage of transformation. After 3 years and 2 6L80 transmissions go bust. I am finally going to get rid of those POS 6L80's that love to flare shift. A list of parts for the swap.

RPM Stage 6 TH400 w/Trans brake and rev manual valve body.
Precision custom torque converter (3600 stall)
SFI Bell housing
B & M Pro shifter
B & M trans cooler w/ Fan
Custom drive shaft
GForce 1500 H.P. axles
BMR diff bushings
BMR drive shaft loop

Man that a good set up for the track. I take it that you want be doing much highway driving.

You are right not much highway driving. Won't be to bad though, should turn about 2600 @ 70

That a little better then my 68. I have a 502 in it with the TH400 @55 to 60 am at 2600 rpm.

That's a lot of power on the stock block. Any track times?

Not yet but soon. Been fighting trans problems since installing the YSI. I have it set at 700 RWHP @12 PSI. The 850 RWHP @17 PSI pull was just to see what she would do.

Sounds about right. I had 720 through the 6L at 13psi and lots of issues w the trans. 4L is the way to go

Well TH400 by Lethal Racing is complete. Really looks like a factory install ! Top notch work by Nick and crew. Car drives great and I am having fun shifting the manual valve body. Took her on a hour highway drive to Cars and Coffee an hour away in Baton Rouge the day after picking her up. All went great and turned 2700 @ 70 MPH. Iron out a few more nick nacks and off to the track we go !!!

Looks good that the same trans cooler am using. How did you get it work on the front of the bumper?

I really dont know, Lethal did the install. I can tell you that the fan is only about 1/8" away from the front bumper skin. Really close but it fits

I really dont know, Lethal did the install. I can tell you that the fan is only about 1/8" away from the front bumper skin. Really close but it fits

This is pretty much what I am looking to do with my manual 6 Speed
Drop it and put in the turbo 400.
How much modding do you think there will be to make it work?
Thanx

What gear you running??

3.23's