6 Speeds 800Ft.Lbs. Rear Drive FULL ELECTRONIC!

[MCummings]

Hey guys.



Anybody wanna throw some brains together and shoot some poop on the new possibilities of the new 68RFE?



I'm thinking of stand alone controllers, converter lockup in any gear, adjustable shift points, extremely adjustable shift firmness, and the ability to control shift points, shift firmness, and speed limiters, just like th E4OD in the Ford...



What do yall think?



Merrick

 

[KCJackson]

Just to clarify, the "8" in 68RFE does not mean 800 lb-ft. It's just a relative strength value compared to the other transmissions Mopar builds. If that digit was torque rating, 12-valve engines could have used the 46RE - instead, they were detuned for the 47RE.

 

[MCummings]

Hmm,



THanks KCJ. I was told by a fwe guys that the second number was teh torque rating number. Maybe I just misunderstood (obviously :-laf )



Merrick

 

[Nate]

Nope. If that was the case, the 42RE in my Jeep would only be good for 200 ft/lbs. Motor makes more than that.

 

[PVanderlugt]

It would be very interesting to see how this transmission works, my worry would be that it is newly designed, electronic and completly computer controlled, it be interesting to see what inputs this transmission gives to the pcm and what inputs the pcm uses to make decisions on shifting, im sure it is at least looking at TPS, RPM, temp, load and probably a couple dozen or so more factors, something tells me a stand alone box would be a pain to develop. now if somebody would get on that bandwagon, I am sure there would be a good sized marked for it, there are a lot of 2nd and 3rd geners, that would love to have a 6 speed auto.

What would be realy cool if they could make a stand alone box that would be accessable with a laptop so you can customize shiftpoints etc.

Maybe we all should get together and pitch in a couple of $$ to get this ball rolling

pete

 

[KCJackson]

It would be very interesting to see how this transmission works, my worry would be that it is newly designed, electronic and completly computer controlled

If this was a clean-sheet transmission, I'd be worried. But it is based on the existing (and proven) 45RFE and 545RFE, so I'd have the same confidence with the 68RFE as I did with the 48RE.

 

[tmacc]

So, just out of curiousity, What vehicles use the 45RFE and 545RFE? I've got just under 200K on my 47RE w/o any major problems. I put a VB andd TC from DTT when it had 90K on it only because of the engine upgrades. The tech that took it apart, checked every part in the transmission and found that a $50 thrust washer had a little wear and replaced it. I have no complaints.

 

[KCJackson]

For the last 3 years, every Ram/Durango/Dakota/Grand Cherokee/Commander with either the 4. 7L OHC V8 or 5. 7L Hemi V8 has the 545RFE for an automatic. The 45RFE was used a couple of years earlier in the Grand Cherokee/Durango/Dakota with the 3. 7L V6 and 4. 7L V8.

 

[MCummings]

The Full Electronic part is going to be so much fun...



Merrick

 

[Garry Verheyden]

Does anyone know if the input and output shaft are thicker than the 47 re. Also what other parts are heavier duty. Or is it just more gears and similar strength??

Garry

 

[ilovetrains]

For the last 3 years, every Ram/Durango/Dakota/Grand Cherokee/Commander with either the 4. 7L OHC V8 or 5. 7L Hemi V8 has the 545RFE for an automatic. The 45RFE was used a couple of years earlier in the Grand Cherokee/Durango/Dakota with the 3. 7L V6 and 4. 7L V8.

You can add every 300/Charger/Magnum with the HEMI to that lsit for the 545RFE. It was used with the 4. 7 for the last 2 model years of the WJ Grand Cherokee only, earlier 4. 7 got a different transmission. It is now used for all V8 applications in the Grand Cherokee and Commander.

 

[KCJackson]

You can add every 300/Charger/Magnum with the HEMI to that lsit for the 545RFE. It was used with the 4. 7 for the last 2 model years of the WJ Grand Cherokee only, earlier 4. 7 got a different transmission. It is now used for all V8 applications in the Grand Cherokee and Commander.

The LX sedans use the Mercedes W5A580 5-speed (option code DGJ), not the 545RFE (DGQ).