I know people like the diablo sport and superchips, But I have a 2004 with hemi.
I would like a better shifting trans. and need to change axle ratio option or tire size. I installed a srt-10 dana 60 with 4.56 gears and my speedo is off 10 mph.

 

Superchips, either the 3865 or the Cortex. I don't believe anybody else has tranny support for an '04.

I have a fairly laid back shift schedule programmed (still a good bit more aggressive than stock though) and have my torque management reduced 80%. Some pretty good aggressive shift schedules out there you can use though...

 

which one do you use Hammer?
and can you change axle ratio or tire size?

 

Nice rearend there. If your speedo is off then must have to do with the difference in tone ring size. With SC3865 you can enter different tire OD, so as a last resort if you cannot figure out an easy solution you can enter a bigger or smaller tire size to make up the 10 MPH (Just a thought) Good Luck..

 

I have the 3865. The Cortex has the same tunes, but the added benefit of coming with a powertrain warranty (which is void IF you download the tranny recalibrations). So I personally see no benefit in spending the extra coin on the Cortex.

The speedo is read off the ring gear, so re-calibration is not necessary for a gear change. On vehicles that require this, the corresponding SC unit has axle ratio options. You only need to recalibrate the speedo for tire size diameter changes and yes, the SC has that option...

 

I understand the want for trans support but it also is going to depend on IF you ever plan on doing a big enough cam where you will NEED a tuner that can custom tune. However, it is easy enough to sell or trade a SC3865 and pick up a Diablo U7137

 

It would be nice if SOMEBODY would offer BOTH tranny support and custom tunes for an '04, wouldn't it?

But selling off an SC, buying a Diablo for a larger cam and giving up tranny support doesn't have to happen though. A good many guys are now piggybacking a Superchips with an SCT.

Although I've heard talk of "Off-Road Only" tuners in the works at SC, so lets hope...

 

the funny thing about that is sct knows it works good too i talked to them at the PRI show thursday and they know people are having luck with it....i dont understand why your speedo is off i put 456 in my truck and my speedo is fine...its gotta be something the tech did wrong or the rear being a d60...pop for the 3865 superchips it should help if not you may need something else done...

 

Totally agree. Its amazing no company out there offers this setup. Each has their own specialty but neither have 100% to offer. So for us we have to choose the lesser of two evils.

 

Just ordered A Christmas present for my truck. SC 3865

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