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08 3500 Not Shifting to OD and downshifting at 30MPH

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08 3500 Not Shifting to OD and downshifting at 30MPH

  #11  
Old 08-18-2011, 09:41 PM
horatio102
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Did the shop tell you what they found when they tore down your trans the first time? Were clutches worn/warped? Anything out of the ordinary?

Did they record your CVI numbers?

9. Converter
16. Torque converter

??
What about the pump? Did they do anything with that? Why only 1 filter? Did they replace both? There's a spin on pump-return filter and the flat pan sump filter.

I'm not suggesting that either of those would be the cause, just curious.



If I were you, I'd get on the phone with someone who really knows these transmissions, and see what they have to say. Suncoast Converters has been outstanding with their tech support for me. But really, you're somewhat married to whoever did your trans unless they're willing to refund your investment.
 

Last edited by horatio102; 08-18-2011 at 09:54 PM.
  #12  
Old 08-19-2011, 11:54 AM
6wheelworld
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I took the truck back to the TRanny shop this morning. It actually ran fine the whole way there but check engine light was on. The mechanic spent about 45 minutes making sure nothing was wrong with transmission but then tried clearing codes. He ran the scanner after trying to clear codes and found a ton of codes in the codes per CUT. I have attached picture as well as pictures with Clutch index volumes which he said were fine.

Before I left he asked me if I was buying truck from a lot which I am and he asked me o call them and see if they had a tracking device in it which they do. He said he thinks there is also a power chip that was installed in the truck that's not been updated but he cant find it or the tracking device could be causing errors.



 
  #13  
Old 08-19-2011, 10:25 PM
horatio102
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It is my understanding that the CVI numbers are basically the clearance values for the different clutch packs, given in thousandths of an inch.

Your specs should be: (yours)

2C = 39-65 (44)
4C = 30-55 (59)
L/R= 46-82 (85)
OD = 30-63 (23)
UD = 40-68 (42)


So your 2c and Underdrive clutches are within spec, but the 4c and low/reverse are looser than spec, and your Overdrive clutches are tighter than spec.

In my case, my OD was 21 because I had 7 clutch discs with no friction material left on them, but they heated up so much that they were all warped and taking up the extra space.


How many miles have you put on it since rebuilding it? Did the shop clear the memory and all codes after sticking the trans back in?
 
  #14  
Old 10-27-2011, 12:58 PM
6wheelworld
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So after the tranny rebuild and the valve body I had it towed yet to another Dodge dealer claiming to have the top Diesel mechanic around. He stated it was merely a cracked boot in the turbo causing all of my issues. 100 miles after that I had the same issue...then they said it needed an egr etc and did that...still same issues about 120 miles later...next they claimed turbo was seized up so i picked up truck and after 100 feet the turbo worked fine and drove it a few weeks doing my key trick from original problem but now 3 weeks after truck is not longer going into 5th or 6th gear.

I Have over 7500 in repairs and a truck that sits while we rent Ryder and Penske weekly.

It is funny as I have seen about 11 2008 3500 trucks fro sale locally and Ebay that have sellers claiming the truck will not shift to 5th or 6th gear and they are dumping them
 
  #15  
Old 10-27-2011, 09:34 PM
horatio102
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Top diesel mechanics may not know crap about a transmission that's only 4 years old. It's based upon (and uses many of the same special tools as) the 45/545rfe, but it also has significant differences.

I would be throwing a MAJOR fit if I were $7500 in the hole from throwing parts blindly at a problem. That's lawsuit material right there. I'm not a fan whatsoever of litigation, but if a shop diagnoses a problem multiple times incorrectly, they need to eat the parts and labor and they need to find someone who can actually diagnose the real problem.

Blind guesses are hack attempts at diagnosis.

What are your current CVI numbers? Did the shop do a quick learn? It's not rocket science here, the CVI numbers are basically the TCM telling you what the clutch tolerance is, if it's outside of spec there needs to be a reason why - either it was assembled incorrectly or the steels are warped or the frictions are missing. The CVI numbers will tell you exactly where to look when tearing the trans down. Then basically you have to inspect for leaking seals.

Get your money back for everything they didn't fix. Call Chrysler and open a complaint.
 
  #16  
Old 11-20-2011, 03:35 PM
wheelz
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Default sometimes o/d

01 1500 1/2 ton 2 wd
 
  #17  
Old 11-20-2011, 08:13 PM
horatio102
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Originally Posted by wheelz View Post
01 1500 1/2 ton 2 wd
What trans?

It's still probably worn out overdrive clutches.
 
  #18  
Old 05-13-2012, 10:05 PM
cottonman
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I have a 2008 ram 2500 6.7 same tranny same problems...Ive heard its the Overdrive Clutch pack going out and i am going tomorrow to the dealer to confirm it. If it is the O.D. pack, Im really gonna bitch since i only have 75,000 miles on it.
 
  #19  
Old 08-01-2012, 06:24 PM
legRAM
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Default 2008 Ram 3500 6.7 tranny issues

I have this similar problem. I have a 2008 Ram Diesel 6.7 with 60,000 miles. I will go to pass a vehicle, and when it goes into passing gear it shifts down into 4th gear and stays there, RPMs redlining.. I will pull over, shut truck off, start it back up and it will shift fine.
Dealer can't duplicate. any suggestions?
 
  #20  
Old 04-19-2013, 08:08 AM
grant9628
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Hi legram I got the same truck and the same problems did u sort yours out? A lot of these issues sound like poor connections or bad earthing issues especially when it can be temporarily rectified by turning ignition off or removing battery terminals
 

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