Anyone know what the 4.7 tranny is rated to?

The Assassin · Sep 28, 2010

I think the tranny in the 4.7 and Hemi are the same (key word think). Anyone know how much power they can hold roughly?

RubberFrog · Sep 28, 2010

they are the same

they seem to start grenading around 350 rwhp

The Assassin · Sep 28, 2010

RubberFrog said:
they are the same

they seem to start grenading around 350 rwhp

Don't the Hemi's have 390ish hp?

0212353 · Sep 28, 2010

not at the wheels.........the 09+ has 390 at the crank, but there is a ****load of drivetrain loss on these trucks.

The Assassin · Sep 28, 2010

Gotcha...hmmm I might need a STRONGER trans...

Silverbullet08 · Sep 28, 2010

are u getting the hemi engine i found?

Marx · Sep 28, 2010

get the one they use on the viper truck, isn't it just the diesel tranny with different programing

Silverbullet08 · Sep 28, 2010

Marx said:
get the one they use on the viper truck, isn't it just the diesel tranny with different programing

its strong but its not as strong either. most guys have theirs built esp in a qc...

cheapbeater · Sep 28, 2010

i wouldnt want to put any forced induction in front of one of these slushboxes..

Bad Habit · Sep 28, 2010

depends on the call name i believe...545-rfe...if i remember right i read that somewhere...

truckin151 · Sep 28, 2010

What parts usually blow after 350rwhp? Of course at that point you're looking right at or about 450hp at the crank.... I know I have seen guys with the stock trans (well semi stock, new valve body & converter) pushing more to the wheels than that with little issues.

RubberFrog · Sep 28, 2010

Sure, and you've seen a lot more that WERE having problems.

truckin151 · Sep 28, 2010

But what problems? Curious as to WHAT actually starts to fail after you hit that point..

RubberFrog · Sep 28, 2010

That I can't speak to specifically, but these trannies just weren't rated for that kind of power.

Bad Habit · Sep 28, 2010

this is one of them arguments like the 4.7 arguement i have all the time some last some dont...period....

Hemiguy0302 · Sep 28, 2010

I have taken ***** that were more rugged than the 545...

The Assassin · Sep 29, 2010

Silverbullet08 said:
are u getting the hemi engine i found?

Decided to keep what I have

cheapbeater said:
i wouldnt want to put any forced induction in front of one of these slushboxes..

Well, stay tuned...I'll am aiming to be turbo'd over the Winter.

KGBIGCOUNTRY · Oct 5, 2010

^What PSI boost you plan on putting on stock internals? Or is the engine getting pulled and reworked also?

The Assassin · Oct 7, 2010

kgbigcountry said:
^what psi boost you plan on putting on stock internals? Or is the engine getting pulled and reworked also?

6-8 psi

RubberFrog · Oct 7, 2010

Why turbo and not supercharged?

A lifted truck on 37s is going to take a while to get the rpm's up and get boost.

Anyone know what the 4.7 tranny is rated to?

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