kromberg

With the new power level I will be at, the build 4L60E I have now will definitely not survive the season coming up here. I am starting to look at other transmission options. I would like to get people's feedback on the following transmissions that actually have them installed and running. Here is what I have researched so far:

• 4L80E - Has overdrive which is a super nice option. Can be built to have 1000+ rwhp. Requires a lot of cutting to fit.... downside.
• TH400 - Three gears and can be built to handle 1000+ rwhp.
• Powerglide - Can be built to handle any rwhp thrown at it. Downside two gears.

At this point I want to keep the IRS since the car is not back halved yet...... yet

The car is basically about 90% track dedicated, but I do run it around town from time to time so I would like a 'litttle' street manners.

ysb02

Glide or TH400, unless it's a mostly road car skip the 4L80E.

Arun@Dasilvamotorsports

If it's 90% track then just do the glide.

I'm still on my 4L60, hasn't let me down yet.

racerrob333

Th400 or the glide are great choices, alot of the guys in the drag world are making 2 speeds out of the th400. I went with the glide

AZZ-KIKR

I'd go for the TH400.. My engine builder has one in his race car which makes 12xx on 18psi.. With that and his 3.23 gears, he can still street it when needed and on his shake down runs up here he is in the 9.0x range at almost 160..

It was built by a shop up here in Ft Collins who has done several of mine and has a great reputation for well built transmissions..

PM me if you want contact info, Keith..

mdaniel

The 4L80 conversion will exceed the cost of the car.
The fastest IRS Vettes are running T400s.
Can't argue with the Glide either for the 8 second cars.

DOUG @ ECS

The power glide is the only one out of those choices that does not need body modifactions to fit it, so going back and forth from say a six speed to a glide is very easy and something we have done for customers more then once since it's a day job to swap.

IE, street cars 9 months a year, track car for the best 3 months of the year.

Best of both worlds.

racerrob333

I bet a glide will make it in the 6s this Year

kromberg

With 3.15 gears in the diff, what MPH would a powerglide shift at?

road pilot

I like the glide for alot of track time. If you are going to use
your vette on the street why not build what you got. There
are several good performance tranny builders-Performa, RPM,
Finish Line , they can build to what ever hp you have or dream
of having. Explore all of your options.

kromberg

The 4L60E is built has much as it can be. I just do not see it holding 1000 rhwp long.... if at all.

4DRUSH

what ever you shift it at (manual valve body)

That's part of the fun

TH400 & PG are both 1:1 in high gear, same as 3rd in auto or 4th w/stick

0rodney@rpmtransmissions

road pilot

I understand but have you talked to performance tranny builders???

robert miller

Now why did you go do this for man. Just a work of art in that piece.. Robert

kromberg

Nice, that just made my pants dance a little bit PM is sent your way.