A different engine, different mounts, different body structure, different TCM w/different torque converter clutch lock and partial lock(slippage mode) maps and on goes the list. I would be surprised if RSN was back. Remember-the NAG1 transmission is utilized in several DC product lines and I am not aware of any reports of RSN from those. Doktor AndyAh interesting Andy!
Does that mean that our ol' friend RSN is included or did they fix that with reprogramming or new internal hardware or fluid?
This is actually good news to me because if they fixed it, we could actually find out if we could do a retrofit to 06 and earlier NAG1's.
Thanks,
Seek
Do a google on "nag1 shudder." It's there from a leaking fill tube TSB (which supposedly is cancelled) to shifting complaints from Jeep owners to Crossfire owners. While the complaints of the problem might not be the same, they sure sound like.
'07 models of the above may be included as well. My source was pre-'07 model introduction. Doktor Andy
I've written many times before that words can mean different things to different people - the info of the attached looks like RSN to me.
Talkinghorse43 is right.
That's an excellent find.
The different suffixs on the NAG1 type numbers pertain to detail differences between the same basic NAG1 transmissions. In the case of the Sprinter it is a NAG1 with a Sprinter engine specific bellhousing, clutch discs unique to the Sprinter, drain plugs in the pan and torque converter, etc. The clutch dics in the other DC ( not Sprinter and xfire) NAG1 applications-apparently are designed to survive a diet of ATF+4. Doktor Andy
An interesting thread which yields two significant pieces of info. The first is a high priced passenger car(but very low production #'s) apparently displaying our RSN symptoms and the second is that P-27 60-43 MBenz passenger car TSB. This TSB addresses TCC rough engagement and/OR DRONING. Thats the first time I've seen MBenz label what appears to be RSN (as droning). Keep in mind this TSB concerns the 722.6 Transmissions- which are NOT NAG1s but are the MBenz passenger 5 speed electronic controlled auto sticks, similar to NAG1. I quizzed my contacts at MBenz and they provided some interesting info-namely that the simple adaptation procedure for the TCC(offered as a solution in this TSB) was a temporary solution and the final fix came with replacement TCMs which probably featured revised maps for the TCC operation. I surmise that his problem, affecting large numbers of high priced passenger vehicles, apparently warrented some engineering time for a fix. The Xfire production numbers and Sprinter numbers (and/or its commercial application) apparently do not. It will be interesting to see if they have addressed the droning issue in the '07 model. Doktor Andy
Not really the first time. I'm sure you remember the "grumbling, DRONING, jerking" tranny problem description in that "schiess" '03 service manual (purchased from DC). There, the recommended fix was to replace the TCC PWM valve, which would require replacing the valve body (@~$1000 per).