well yesterday I did just that,, working out the bugs right now. may go to the strip wed to see how she runs,,so far on the street she runs good, only one thing i don't like when i get that fixed, i'll post.

now that is a teaser.. JIM

edit: very soon I may have a srt6 differential with wavetrac installed for sale.

 

I'd actually like to go from a 3.27 to a 3.07. Anybody with an SRT-6 who wants to do the 3.07 to 3.27 can trade me diffs straight up. I'd actually like to go lower if that were possible.

 

first of all let me tell you, the euro charge TCM,, DID NOT WORK , I went to the track, nice and easy the first run, the next four runs the car when the limp mode,,
327 is still in the car, my TCM has been sent to Chicago, I should get it back in about a week, set up for the 327..

To answer your question, if you wanted to put a 307 in your car, and have your TCM retuned 307,, and the person you trade with would also have to get a retuned TCM, simply because your car is a limited, and the car the 307 is coming from is an SRT 6,, I'm saying the TCM out of the SRT 6 has to stay in the SRT six,(any srt6),, the TCM in the limited has to stay in the limited,, now the best way to do it would be, the person with the SRT 6 to have a spare TCM set up for the 3.27 and the person with the limited have a spare TCM set up for the 307,
think I said that right

Let's put it this way I have two differentials and 2 TCM's, one differential has a 307 and a TCU for that,,,
the other rear end has a 327, and I'm having a TCM built for it , both TCU's will work in any SRT 6

the SRT 6 TCm will not work in the limited, ( unless it is retuned to the limited)
and the same goes for the limited TC M will not work in the SRT 6 unless it is tuned for the 6

 

Are there any compatible diffs out there that go even lower?

 

compatible no,, can be made to work yes.
Example: the other day we had a Chrysler 300, v6 with a 267, 247 don't remember the exact number,but we were installing a 2011 Challenger 3.92 differential. we had to change his axles and hubs. But on his car it was a complete bolt in ,,, to put this in a crossfire, you would need the axles and hubs of course, yes the axles and hubs will fit a crossfire,, as for his differential you have to make a bracket, per the back of the differential.,, Or you could just add a hole , well then a couple brackets, set your TCM 392, and you're ready to go..

There are some Mercedes differentials I'm working on to see what it will take to get him the bolt right in,, for example the one out of the chrysler 300,, is a four point yoke ,, change number one,, put our cover on the rear,, on the back of the differential, change number 2,,, use a short bolt. Going up on the front of the differential. you have to use the axles out of the out of a charger because the ones in the 300 are too wide or long ,,and hubs also , And then it's in the car

 

Anybody ever swapped over to a 7 g tronic?

 

Yup, Mercedes did starting back in 2003 with select S500s and people have been hating them ever since.

 

Any idea what they're gonna do differently to make it work this time? Gear swap would be AMAZING in this car!

 

All I can say is that we are working on it, ,,it will happen

 

well, I wouldn't be interested for this slight of change, but if we could get in the 3.55 range....or up...it would be worth the investment....still watching and learning though...

 

Jim;

The difference between the 307 and 327 is the rotational speed of the wheels due to the gearing differences. I did a lot of study on this issue and planned to build a digital counter that could increase the wheel speed count or reduce it so as to make the computer think that the gear was not changed.

This would have solved the issue, but there would be a need to have two such converters to correct each rear wheel and started to look like a bunch of work, I decided to shelve the issue. Since then, when I had a moment to reflect on this problem, I decided to approach this differently.

Jim, you are the man to put my plan into effect; it might get you the rear ratio that you want to run. Have you compared the number of teeth on the NA and SRT to see if they are the same or are the count different. If the " TONE RINGS " have the same number of teeth, then this idea is not workable. IF they are different, then swapping the tone rings would correct the wheel speed pick-ups and make the 3.27 work as the computer would get the correct count that it was looking for.

Changing the computer will be an issue requiring new code to be written, not just a simple swap of parameters that tuners do.

SO let us know if the wheel speed tone rings are the same or different.....inquiring minds want to know.

ENJOY< WDY

 

When discussions of dyno on the BEGi project were going on.. I had read an article about sharing the front wheel signal to feed the rear wheels input. Is this feasable?

 

TO parrot the front signal to the rear is to invite total loss of control of the car when the ESP kicks in the brakes to correct errors the computer might imagine.

Further, the BAS could not operate safely, like pulling the fuse - I did it at autocross once and slid thru an on course gate brakes locked.

Also turning would generate codes for the crazy lateral sensor versus wheel speed and steering angle sensor.

I could not see it at this time. Already considered it and the front wheels operate at a different rotational speed anyway, further issues to deal with..........

Yuckkers, I had started to consider up down counters to mimic a ratio of the wheel speed to solve this but the safety of the car could be glitched and kill someone it the 3000 pound car had a hick-up. Peoples lives are at risk and needs to be considered on a dual purpose car application. Safe is safe..........Woody

 

Doc, it has been done already, in a few mercedes cars, they have gone from 2.65 to 3.46 and it is working ,, the work that i got done by euro charge, just did not work. I have now gone to the person that made the TCM change to begin with,, being that my car is a Crossfire, SL 55, E 55, mixture.it's a little harder to do unless you have a history of the car,. The reason the crossfire, meaning myself only has one other gear set that fits, the one from the limited which is a 3.27. Then 327 is what has to be. For now

Woody answered your question above on why I am only going with a 3.27 that's why I'm doing this work to see what Chrysler 300 or Magnum or what other rear and I can get to fit in the car that will give me a different ratio, once this is accomplished, we can run any year we want, because we can buy the years, we can have the TCU reset, and it's ready to go.

ps I ran the car for well over a week with 327 in the car, on the street it seemed to work pretty good, I only had one problem and that was between second and third, I had little transmission slip, when I called Jerry at euro charge,for the second time,, he told me that he was tired of holding people's hand and told me that he had told me how to fix it and being that I didn't do that, for me to send it back to him,, ( I had taken the car over to Nemo's and we followed jerry's instructions, and it still didn't work) so guess what I sent it back.
now I'm getting the TCM done correctly. the first thing I was ask by this person, WHAT GEAR DO YOU WANT THE TCM SET FOR,, my answer was I only have a 3.27 gear set.. Woody I think you got a good idea but is no longer necessary to do all that work, all you need is a TCU from an SRT 6 it can be reset whatever gear you want, if you have a limited, all you need is a TCU from a limited, and it can be reset whatever gear you want,you are

 

I didn't realize you were looking at street-ability. Thought this was primarily as a racing application. Even if you manage to "lie" to the computer and engineer a true rear wheel signal.. isn't the computer going to be trying to compensate at "stock configurations" and therefore make erroneous compensations?

 

ok look at it like this the factory made the limited with a 3.27 ratio ans set the transmission to monitor the input and output of the transmission and the speed of the rear wheels, and they did the same with the srt 6 with 3.07 ratio,, what was found could be done was to tell the transmission that the speed to the ratio would now be 3.27 for this transmission,, we know a srt6 tcm will not work if you just put it into a limited car but if you told the tcm that this is going to be it's new ratio then it will work, it;s the same as,, if when the car was built you could get either rear ratio you want, the factory would set the tcm for what ratio you ordered,,
the 3.27 happens to be a bolt in swap otherwise i would be running a 3.73 with 28" tall tires.

as far as racing, yes that is why i want it done but i also drive to the track so it has to work on the street and the track

 

I would love a 2.65 with an SRT-6 engine and trans. Get the motor up around 500hp and go for the highest top speed run that any Crossfire has ever seen

 

Good luck with that. LOL You're gonna need way north of 500 at the tires once you hit 5th gear if you wanna keep the needle moving.

 

An SRT motor at 500+ HP? OK, what have I been missing? I dream of winning the lottery but realize it probably will not happen. Is there an SRT 3.2L up wards of 500 HP now? If so, I surely don't have the $ to afford it or replace the tanked parts when using it.