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01-12-2015, 11:18 AM
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#1
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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390BH-60 Fifth gear issue
When I am taking off from a stop or accelerating from 30mph, I have an issue when the coach shifts from 4th to 5th. Once it shifts to fifth, the turbo boost drops to 5-8lbs and the Berk stops accelerating. No matter how much as I press the pedal, it barely maintains speed in the 55mph range on flat ground. Once I go downhill and get to 60mph it shifts to 6th gear and the boost kicks back in. I can manually put it in 4th and get to 60 and then put it back in auto and it does better.
Does anyone have this issue? Have you noticed anything similar?
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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01-12-2015, 11:39 AM
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#2
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Senior Member
Join Date: May 2013
Location: Virginia
Posts: 619
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I personally have not had that issue ever with my 2014 390BH (340).
Jason
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01-12-2015, 11:44 AM
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#3
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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Quote:
Originally Posted by JTN8
I personally have not had that issue ever with my 2014 390BH (340).
Jason
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Ok.
I am just checking before I take it to Freightliner.
Thanks!
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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01-12-2015, 11:45 AM
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#4
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Fault codes?
Fuel filter/s replaced?
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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01-12-2015, 11:50 AM
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#5
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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Quote:
Originally Posted by Ford Idaho
Fault codes?
Fuel filter/s replaced?
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No Fault codes and I replaced the fuel filters 2k miles ago. It has been doing this since I bought it. It pulls like a freight train until it hits 5th and then you almost experience weightlessness as the acceleration stops.
I have been telling myself it is some kind of transmission program to protect 5th gear, but we went to the Orange Bowl in Miami and it was very annoying.
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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01-12-2015, 11:50 AM
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#6
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Senior Member
Join Date: May 2013
Location: Virginia
Posts: 619
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It almost sounds like your computer needs to be re-flashed or programmed. If it's working fine in all the gears except 5, then I would think the computer is cutting your turbo back in 5th gear for some
Reason.
Jason
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01-12-2015, 11:52 AM
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#7
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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I tend to agree with you.
I just wanted to see if anyone else had this issue before I take it to Freightliner. It's only 30-45 minutes from me, but it is a hassle to take it in.
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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01-12-2015, 11:58 AM
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#8
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by baddmann
No Fault codes and I replaced the fuel filters 2k miles ago. It has been doing this since I bought it. It pulls like a freight train until it hits 5th and then you almost experience weightlessness as the acceleration stops.
I have been telling myself it is some kind of transmission program to protect 5th gear, but we went to the Orange Bowl in Miami and it was very annoying.
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If you pull the dipstick for the transmission and sniff the oil does it smell like it is burnt?
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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01-12-2015, 12:58 PM
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#9
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Senior Member
Join Date: Dec 2014
Location: SD
Posts: 172
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Quote:
Originally Posted by baddmann
No Fault codes and I replaced the fuel filters 2k miles ago. It has been doing this since I bought it. It pulls like a freight train until it hits 5th and then you almost experience weightlessness as the acceleration stops.
I have been telling myself it is some kind of transmission program to protect 5th gear, but we went to the Orange Bowl in Miami and it was very annoying.
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It sounds to me like turbo-under boost sensor is faulty
__________________
2006 Gmc
2016 Forestriver Sierra 376 BHOK
Full Timers
Dick,
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01-12-2015, 01:00 PM
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#10
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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I have not smelled the fluid. I'll go the storage and check it.
Looks like I need to take it to Freightliner.
Thanks for the replies.
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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01-12-2015, 09:32 PM
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#11
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Senior Member
Join Date: Mar 2013
Location: Cut Off, La.
Posts: 1,830
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390BH-60 Fifth gear issue
I would call the FL hotline, see if they can recommend anything, then take it to an Allison shop and have them check the CPU on the transmission.
I didn't have this problem but I had a communication issue with mine. It was covered under warranty.
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2013 Berkshire 390BH
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01-27-2015, 11:23 PM
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#12
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Junior Member
Join Date: Dec 2012
Posts: 14
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I had the identical problem in mine. All boost would drop in my 4 to 5 shift. Freightliner was able to diagnose it in about 10 minutes back to a simple programming error. Call freight liner corporate for assistance because my local service center was confused until they got direction from FL. Once FL was involved, my coach was ready in minutes. Glenn Collins at FL was the one who helped me. 800-385-4357. Hope this helps. Call me if you need my info so Glenn can pull up my case for reference. I'm at 3102613443. -brian
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01-28-2015, 12:16 PM
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#13
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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Excellent. Thanks! I will take it in next week and report back
__________________
Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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03-21-2015, 09:52 AM
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#14
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Senior Member
Join Date: Aug 2012
Location: Madison, MS
Posts: 154
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Quote:
Originally Posted by bborder
I had the identical problem in mine. All boost would drop in my 4 to 5 shift. Freightliner was able to diagnose it in about 10 minutes back to a simple programming error. Call freight liner corporate for assistance because my local service center was confused until they got direction from FL. Once FL was involved, my coach was ready in minutes. Glenn Collins at FL was the one who helped me. 800-385-4357. Hope this helps. Call me if you need my info so Glenn can pull up my case for reference. I'm at 3102613443. -brian
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Brian: Thanks for your help. It was a simple programming error. "Powertrain Protection" was enabled and should be disabled on motorhomes. Once that was corrected, it drives like a champ. Boost in 5th gear is back!
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Brian and Kelly
2016 Entegra Anthem 44B
2013 Jeep Wrangler Sahara Unlimited
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