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NAG1 Transmission Behavior
This is a discussion on NAG1 Transmission Behavior within the General Sprinter Forum forums, part of the General Sprinter Van Forum category; Took a test drive in a 2006 / 2500 Sprinter today, and I have a question about the way the ...
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12-30-2009, 09:12 PM #1Junior Member
- Join Date
- Dec 2009
- Location
- Hastings, MI
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- 7
NAG1 Transmission Behavior
Took a test drive in a 2006 / 2500 Sprinter today, and I have a question about the way the transmission operated. I couldn't take this unit out on the highway, since the owner only has "parking" insurance - so I drove it around the apartment complex several times. What was noticeable was a definite "slippage" when shifting from either 1st or 2nd (not sure which) into 3rd, with the engine momentarily revving up to around 2,500+ RPM. I was able to repeat this multiple times, when accelerating from a stop. My question is whether or not this is "normal" for this unit when cold, or should I walk? It was about 25 degrees at the time. This unit has 122K miles on it, and otherwise looks in very good condition. Since the owner has no liability insurance, it can't be taken to a shop for checkout/evaluation without him being at risk. Thanx in advance for any feedback . . .
Last edited by jhamlin; 12-31-2009 at 10:33 AM.
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07-13-2010, 01:05 PM #2Junior Member
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- Jul 2009
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- 10
flare shift
This is an old post, but I'll respond since I had a similar problem with my van. It sounds like what they call flare shifting. One dealership wanted $11,000 for a new transmission. I found another dealership willing to research and find all the parts for a rebuild. It was a $2300 job to replace the f1 and f2 overrunning clutch, hollow shaft and k2 retainer.
eb
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07-14-2010, 10:06 AM #3Junior Member
- Join Date
- Dec 2009
- Location
- Hastings, MI
- Posts
- 7
Thanx for the note. It was a private seller, and I quietly walked away. Since then I bought a 2007 / 2500, and it's run like a charm. Maint. is a little expensive but I guess you somehow have to pay for all those miles @ 25mpg! Lovin' it so far . . .


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