Transmission options

[Leadfoot]

If some machinist could fix the 4th gear problem with the 4L80E; it would blow away the duraflite. The 2/3 shift on the duraflite loses ET by 3/5 tenths. It's still faster than an Allison as far as shifts go. Gear ratio in the duraflite is much better and it doesn't require defuel. The 4L80 would blow it away, if 4th was fixed.

I know there is some very skilled machinists on this board.

What would be involved?

Since it hasn't already been done, I'm assuming it's not a simple process...but you know what assume means.

 

[03badmaxxx]

Mike, Doesn't Pulling the shifter down into manual gear on the 4l80e put the coast clutch on and help hold the Sprag so it's not doing all the work? I've seen the spline strip in the OD planetary and another time the planet itself grenaded when we tested this trans in one of our shop race trucks. But i agree, the 4l80E is the shit

 

[TheBac]

Opinions on 6L90? "Oh Hell No!" or "With the right parts, it might..."?

 

[malibu795]

Opinions on 6L90? "Oh Hell No!" or "With the right parts, it might..."?

6l90 is clutch/clutch

Steel cased roller clutch/sprag for 4th gear would be nice

 

[paint94979]

Nobody wants a manual valve body.

In a race only application you can bet all of your flock that a manual valve body is desirable

 

[03badmaxxx]

In a race only application you can bet all of your flock that a manual valve body is desirable

Manual VB with Precision air shifter controlled by the PCS is that good good set up!

 

[DPC]

I have seen a manual VB setup on a 47RE with reverse shift pattern and two switches, one for converter lockup and one for OD, no PCS. Can this be shifted fast enough?

Any advantage to using an air shifter +PCS over just the PCS?

 

[03badmaxxx]

I have seen a manual VB setup on a 47RE with reverse shift pattern and two switches, one for converter lockup and one for OD, no PCS. Can this be shifted fast enough?

Any advantage to using an air shifter +PCS over just the PCS?

Manual vb is uses no solenoid from 1-3, so you can program the shift exactly when you want it through the PCS with the precision air shifter, OD and Lockup can be programmed through it as well. Don't get me wrong the E-618 full electric is bad as well, and you can get some pretty nasty solenoids for them but theres just something about having that shifter and hearing that noise that i love

 

[paint94979]

I have seen a manual VB setup on a 47RE with reverse shift pattern and two switches, one for converter lockup and one for OD, no PCS. Can this be shifted fast enough?

Yes it can be shifted fast enough.

 

[hondarider552]

Manual VB with Precision air shifter controlled by the PCS is that good good set up!

Exactly what one of my cummins friends here in AZ has.... man it shifts awesome.

 

[DPC]

Yes it can be shifted fast enough.

I could always start with a manual VB and if it does not work out I know there are plenty of 5.9 guys who would buy the manual setup.

 

[Xternal]

I'm with Mike In thinking the 4l80 is the cats meow. I love the gearing on it and am currently in the process of looking into swapping out the built 4l60 for an 80 in my ls rig. Mike what about the limited converter options currently available for the 80e?

 

[Mike L.]

I'm with Mike In thinking the 4l80 is the cats meow. I love the gearing on it and am currently in the process of looking into swapping out the built 4l60 for an 80 in my ls rig. Mike what about the limited converter options currently available for the 80e?

I don't think there are limited options on the 4L80E converter. Between Suncoast and Goerend, the only 2 companies I trust, you can get anything.

 

[Xternal]

I've just been hearing of limited options for converters for the guys needing a large stall and still able to couple nice. Granted this is in an ls vehicle so the size could be the main setback

 

[DieselmafiaLLY]

Subd