FourWheelers1987
A 2017 2500 144” Crew 4x4 High
After Google searching this phenomenon, I guess it's my turn to report this problem.
The 1st time this happened was a month ago while going almost nowhere for 30 minutes in San Diego area traffic. As I passed the accident causing the back up, I shifted my '17 Crew 4x4 OM642 from crawling in 1st gear to 2nd then 3rd to begin getting back up to highway speed. Before I could tap the Tiptronic again into 4th gear, it suddenly downshifted ON IT'S OWN into 2nd with the accompanying rpms almost redlining. I quickly tapped it back into 3 but felt a noticeable lack of power.
I manually shift the 5 speed Tiptronic 99.9% of the time, happily using a Scangauge II. I drove cautiously for a few miles finally getting up to my typical 2800-3200 rpm shift range and made it into 4 and 5th gears. After making it back to the east coast without a reoccurrence, I forgot about this odd event . . . until today.
After pulling away from a red light in 1st gear and manually shifting into 2 in no hurry to get to 3rd gear, the transmission abruptly downshifted back into 1st jarring me and my 2 passengers. I thought I accidentally done it until it occurred with BOOM again a mile or so later after another 1st-2nd shift from a red light stop.
We had a long trip ahead of us and after entering the highway, I noticed that power was lacking again. I drove it home gingerly, cancelling our travel plans. When I came to a stop, I noticed the engine temp was reading 200F+ which is above it's normal 175-180F range even after extended driving.
I've read the other posts on this topic with some great suggestions most of which are above my knowledge base. I'm most interested in how to handle this issue with the Sprinter dealer service dept after I have it towed there tomorrow morning.
Any suggestions would be most helpful.
Puzzled, but ready to insist (nicely) on a fix,
FW1987
The 1st time this happened was a month ago while going almost nowhere for 30 minutes in San Diego area traffic. As I passed the accident causing the back up, I shifted my '17 Crew 4x4 OM642 from crawling in 1st gear to 2nd then 3rd to begin getting back up to highway speed. Before I could tap the Tiptronic again into 4th gear, it suddenly downshifted ON IT'S OWN into 2nd with the accompanying rpms almost redlining. I quickly tapped it back into 3 but felt a noticeable lack of power.
I manually shift the 5 speed Tiptronic 99.9% of the time, happily using a Scangauge II. I drove cautiously for a few miles finally getting up to my typical 2800-3200 rpm shift range and made it into 4 and 5th gears. After making it back to the east coast without a reoccurrence, I forgot about this odd event . . . until today.
After pulling away from a red light in 1st gear and manually shifting into 2 in no hurry to get to 3rd gear, the transmission abruptly downshifted back into 1st jarring me and my 2 passengers. I thought I accidentally done it until it occurred with BOOM again a mile or so later after another 1st-2nd shift from a red light stop.
We had a long trip ahead of us and after entering the highway, I noticed that power was lacking again. I drove it home gingerly, cancelling our travel plans. When I came to a stop, I noticed the engine temp was reading 200F+ which is above it's normal 175-180F range even after extended driving.
I've read the other posts on this topic with some great suggestions most of which are above my knowledge base. I'm most interested in how to handle this issue with the Sprinter dealer service dept after I have it towed there tomorrow morning.
Any suggestions would be most helpful.
Puzzled, but ready to insist (nicely) on a fix,
FW1987