Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 02-18-2019, 08:40 PM   #1
Senior Member
 
Brand: Thor Motor Coach
Model: Windsport 35 M
State: New York
Posts: 109
THOR #6832
Tran problem 2018 windsport

Noticed when traveling from Yuma to San Diego coming down from 8000 ft that the tranny shifts down into a very low gear pinning the rpms. To get it out I have to either hit the gas or put in neutral. Pretty scary when coming down. Next week I have to go back to yuma and am a little worried. Called Ford they were no help. The Ford 150 was just recalled because of something similar. Ford says not my Triton v 10. Called my mechanic back home in NY who said try unhooked negative cable on battery to reset factory setting. The rig seems well on flat land.
Any suggestions. May have to come back to San Diego for family and then 2 weeks later back over that nasty mtn for NY. Cannot take it to Ford here.
THANKS in advance
__________________

__________________
gary d is offline   Reply With Quote
Old 02-18-2019, 08:55 PM   #2
Senior Member
 
Long & Winding road's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Axis 25.4
State: Arkansas
Posts: 2,368
THOR #12231
Thats not too uncommon. You can find a few thread on tranny shifting if you look. Many will upgrade to the 5 star tune... it adds more HP and TQ but the shifting is great inpoved (from what I hear.... I have not pulled the trigger yet on this mod).

What RPM's are you talking about? 4000? 5000?. Does It only happens on steep long grades? The more you press on the break the more it will down shift to help slow you down. I noticed this myself. Drives me crazy.

You may not have any issues.
__________________

__________________
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, Fresh water surge tank, Black Tank Tornado flush, 4999 zip ties.
Long & Winding road is offline   Reply With Quote
Old 02-18-2019, 09:04 PM   #3
Senior Member
 
The Gritz Carlton's Avatar
 
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,785
THOR #11130
Also, if you are on "cruise control" the transmission will try to hold the set speed which could result in downshifts way lower than you would do if not on cruise control.
__________________
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
The Gritz Carlton is offline   Reply With Quote
Old 02-18-2019, 09:38 PM   #4
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 1,542
THOR #6411
Quote:
Originally Posted by gary d View Post
Noticed when traveling from Yuma to San Diego coming down from 8000 ft that the tranny shifts down into a very low gear pinning the rpms. To get it out I have to either hit the gas or put in neutral. Pretty scary when coming down. Next week I have to go back to yuma and am a little worried. Called Ford they were no help. The Ford 150 was just recalled because of something similar. Ford says not my Triton v 10. Called my mechanic back home in NY who said try unhooked negative cable on battery to reset factory setting. The rig seems well on flat land.
Any suggestions. May have to come back to San Diego for family and then 2 weeks later back over that nasty mtn for NY. Cannot take it to Ford here.
THANKS in advance
The Triton V-10 is an overhead cam engine and as such is able to stand much higher rpms than push-rod, overhead valve engines. The the ECU (engines computer) limits the V-10 in the motor homes to 5,200 rpm. This engine can sustain operation in the 4,500 to 5,200 rpm range without any damage. Should the coach still continue to accelerate in the present gear the transmission will up-shift rather than over-rev the engine. Unless you see the tachometer go above 5,400 rpm just enjoy the noise. Of course you can disengage the cruise control, show down shift into second and motor down the mountain with all the heavy trucks. This is what I do when out west, as I feel 40 mph on a 6% grade descent is the max speed I feel safe in my 23,000 lb rig.
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 02-18-2019, 11:23 PM   #5
Senior Member
 
halfprice's Avatar
 
Brand: Thor Motor Coach
Model: Hurricane 29M
State: California
Posts: 2,344
THOR #3156
Sounds like the tranny is working how it should. By dropping down in gears it saves your brakes. I drive the Cajon and Tehon passes regularly. I let the tranny do the work to keep my speed under control.

Jerry
__________________
https://www.thorforums.com/forums/f2...mods-4609.html
Jerry, Maria, and Sasha 6lb Yorkie
2017 Thor Hurricane 29M
2016 Jeep Wrangler Unlimited Sport
FMCA # F464385
halfprice is offline   Reply With Quote
Old 02-19-2019, 12:15 AM   #6
Senior Member
 
Brand: Thor Motor Coach
State: Texas
Posts: 176
THOR #8139
Hopefully your using tow/haul and not cruise coming down (or up)a mountain .

As mentioned above 5200rpm is OK for the V10.
We're on our 2nd v10, f53 and now a E450, coming down Raton pass New Mexico and Colorado border puts us at 5200 coming down in both directions.
Once I turned the tow/haul off pinched a new button hole in the seat getting the f53 slowed down. Turned it back on and hit the brakes firmly 2 times and back at 5200.
__________________
abjbrtd is offline   Reply With Quote
Old 02-19-2019, 04:23 AM   #7
Senior Member
 
Long & Winding road's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Axis 25.4
State: Arkansas
Posts: 2,368
THOR #12231
I for one hate to hear my engine rev higher than 4200 - 4500..... thats why im working on my Twin RV parachute system.

I try to scub off the speed as best as I can with the brakes then let them cool for a few minutes (I never ride them). But I have not taken mine into real mtn yet (like CO).
__________________
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, Fresh water surge tank, Black Tank Tornado flush, 4999 zip ties.
Long & Winding road is offline   Reply With Quote
Old 02-19-2019, 12:25 PM   #8
Senior Member
 
The Gritz Carlton's Avatar
 
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,785
THOR #11130
Quote:
Originally Posted by Long & Winding road View Post
I for one hate to hear my engine rev higher than 4200 - 4500..... thats why im working on my Twin RV parachute system.

I try to scub off the speed as best as I can with the brakes then let them cool for a few minutes (I never ride them). But I have not taken mine into real mtn yet (like CO).

Same here...go slower and let the wind help. I have an engine brake that helps but a slower speed and occasional press of the brakes keeps RPM's low, the engine sleeping and the ride very smooth. With engine brake engaged trans only drops down one gear and holds speed.
__________________
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
The Gritz Carlton is offline   Reply With Quote
Old 02-19-2019, 02:26 PM   #9
Senior Member
 
Long & Winding road's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Axis 25.4
State: Arkansas
Posts: 2,368
THOR #12231
Yeah rub it in.... Jake brakes and diesels engines are awesome for going up and DOWN mtn's. LOL

Maybe one of these days I will get a small (35 foot) DP and have robots serve me pizza at the fire side. LOL.
__________________
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, Fresh water surge tank, Black Tank Tornado flush, 4999 zip ties.
Long & Winding road is offline   Reply With Quote
Old 02-19-2019, 03:07 PM   #10
Senior Member
 
The Gritz Carlton's Avatar
 
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,785
THOR #11130
Just call Uber....they can toss you one "Frisbee" style out the window as you coast down that hill.
__________________
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
The Gritz Carlton is offline   Reply With Quote
Old 02-19-2019, 04:54 PM   #11
Senior Member
 
Long & Winding road's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Axis 25.4
State: Arkansas
Posts: 2,368
THOR #12231
Hey, I think your on to something.
__________________
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, Fresh water surge tank, Black Tank Tornado flush, 4999 zip ties.
Long & Winding road is offline   Reply With Quote
Old 02-20-2019, 06:53 PM   #12
Senior Member
 
Brand: Thor Motor Coach
Model: Windsport 35 M
State: New York
Posts: 109
THOR #6832
Tranny

Thanks to all for advice. I donít use cruise when I tow. My only concern is when Iím at bottom of mtn the Tran stays in low gear and I have to either hit the gas real hard or slip into neutral and then back to drive. Is that normal. I keep the shifter in drive and it auto slips to lower gear which is normal I believe. Just dont like when it doesnít upshift auto. Thanks guys
__________________
gary d is offline   Reply With Quote
Old 02-21-2019, 01:11 AM   #13
Senior Member
 
Brand: Thor Motor Coach
State: Texas
Posts: 176
THOR #8139
Sounds normal and not normal.

Sounds normal for tow/haul and cruise control, they are both very aggressive about holding a lower gear. They both get on my nerves so I turn them OFF let shift happen then turn which ever one I'm using back on.
I HATE cruise... set at 65, shifts down at 64 will not shift up till 70 .

Not normal for plain ol drive.
__________________
abjbrtd is offline   Reply With Quote
Old 02-21-2019, 01:52 AM   #14
Senior Member
 
airforceret's Avatar
 
Brand: Thor Motor Coach
Model: Four Winds 26B
State: Indiana
Posts: 311
THOR #6414
I've found in both my past and current V10 when in tow/haul mode that if I gently depress the brake to scrub a couple MPH then gently roll into the throttle to accelerate at the bottom of the mountain it will generally upshift as normal and continue to upshift as normal as I regain speed.
__________________
Roger, Dawn, and Roxie
airforceret is offline   Reply With Quote
Old 02-21-2019, 06:14 AM   #15
Senior Member
 
Brand: Thor Motor Coach
Model: Windsport 35 M
State: New York
Posts: 109
THOR #6832
Yeah my problem is it stays in low. I have floor the pedal for it to come back
__________________
gary d is offline   Reply With Quote
Old 02-21-2019, 09:32 AM   #16
Senior Member
 
Brand: Thor Motor Coach
Model: 25.2 axis
State: South Carolina
Posts: 182
THOR #3992
Trans

Mine does the same thing especially with the cruise on .tries to slow you down no worries as long as it doesn't go past the red line. Would never shifted it up in neutral putting a lot of strain on your brakes going downhill get them things hot you are in trouble. Not saying there's something wrong with your transmission .Iet the engine whine but it sounds like it's going to come through the floor. Want to get a diesel with a jake brake then you still got the same trouble steep inclines are bad on anything.
__________________
nautiquecowboy is offline   Reply With Quote
Old 02-21-2019, 01:20 PM   #17
Senior Member
 
The Gritz Carlton's Avatar
 
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,785
THOR #11130
Quote:
Originally Posted by nautiquecowboy View Post
Mine does the same thing especially with the cruise on .tries to slow you down no worries as long as it doesn't go past the red line. Would never shifted it up in neutral putting a lot of strain on your brakes going downhill get them things hot you are in trouble. Not saying there's something wrong with your transmission .Iet the engine whine but it sounds like it's going to come through the floor. Want to get a diesel with a jake brake then you still got the same trouble steep inclines are bad on anything.

Last statement...not true. There's a huge difference in how they work vs. transmission and it only shifts down one gear. The slower you go, the more it will downshift, but one stage is enough to maintain controlled speed.
__________________
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
The Gritz Carlton is offline   Reply With Quote
Old 02-21-2019, 01:44 PM   #18
Senior Member
 
Brand: Thor Motor Coach
Model: 25.2 axis
State: South Carolina
Posts: 182
THOR #3992
Quote:
Originally Posted by The Gritz Carlton View Post
Last statement...not true. There's a huge difference in how they work vs. transmission and it only shifts down one gear. The slower you go, the more it will downshift, but one stage is enough to maintain controlled speed.
Not sure if you're understanding me or not I know that the engine is not slowing the coach down put the transmission gearing down and on a diesel Jake brake releases compression on the engine which slows it down trucks I drove straight drives you always put it in a lower gear going downhill and hope it never popped out ex truck driver use Jake brake plenty of times
__________________
nautiquecowboy is offline   Reply With Quote
Old 02-21-2019, 02:23 PM   #19
Senior Member
 
16ACE27's Avatar
 
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 3,124
THOR #7035
Quote:
Originally Posted by nautiquecowboy View Post
Not sure if you're understanding me or not I know that the engine is not slowing the coach down put the transmission gearing down and on a diesel Jake brake releases compression on the engine which slows it down trucks I drove straight drives you always put it in a lower gear going downhill and hope it never popped out ex truck driver use Jake brake plenty of times
It would be easier to understand you if you used punctuation, didn't post in a single run-on sentence, and proof-read your post before posting it.

__________________
The USER Formally Known As TFryman
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
16ACE27 is offline   Reply With Quote
Old 02-21-2019, 02:29 PM   #20
Senior Member
 
The Gritz Carlton's Avatar
 
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 3,785
THOR #11130
Quote:
Originally Posted by nautiquecowboy View Post
Not sure if you're understanding me or not I know that the engine is not slowing the coach down put the transmission gearing down and on a diesel Jake brake releases compression on the engine which slows it down trucks I drove straight drives you always put it in a lower gear going downhill and hope it never popped out ex truck driver use Jake brake plenty of times

I do understand these systems. Class A CDL for many years (all endorsements). Jacobs Brake works completely opposite of exhaust brakes. My motorhome doesn't have a straight shift. The exhaust brake will cause the transmission to downshift as it decreases/restricts (traps compression vs, release) engine speed. I speak from current "butt in the seat" experience.
__________________

__________________
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
The Gritz Carlton is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 06:36 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×