Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
Members
Registered members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
RAM TRX - TRX-Forum.com
Bronco Raptor - BroncoRaptorForum.com
Forums
GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2017 lurching in and out of 8th gear after long drive cycle
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="teamster" data-source="post: 1823318" data-attributes="member: 56176"><p>Hey folks, I have a weird issue that has come up a few times now, so it's time to do some digging. I've searched through as best I can and can't find anything that speaks to this specific issue.</p><p></p><p>After about 8-9hrs of driving, of which about 5-6hrs is uninterrupted engine running time (i.e. straight interstate driving, no auto-off or other engine stops), my 2017 transmission starts to run into power and shifting issues going in and out of 8th gear. </p><p></p><p><strong>Context:</strong></p><p>Issue only appears when vehicle has been operating without break for several hours at highway speeds. Shorter interstate trips of less than 4-5hrs does not seem to induce the issue. Long trips with interruptions where the vehicle is power cycled seem to forestall the issue. Issue only seems to present after segments of 4-5hrs without break.</p><p></p><p><strong>Behavior:</strong></p><p>Truck will be driving steadily at 70-75mph, and accelerator is depressed (e.g. to pass a vehicle). The truck pauses a moment before hard shifting down into or past 8th, with a distinct "bump" or lurch feeling before power is applied. The acceleration is not even, and is noticeably reduced compared to regular acceleration. The bump/lurch can be replicated by manually shifting in or out of 8th gear, both up into 9th and down into 7th.</p><p></p><p><strong>Temporary Resolution:</strong></p><p>Stopping the vehicle and cycling the ignition with a short (less than ten minutes) break before resuming operation seems to resolve the issue. This issue has come up twice, both times in the last two weeks.</p><p></p><p>Any thoughts on what this might be? The fact that I can get temporary resolution by cycling the ignition suggests to me that it's likely a software issue. This is a frustrating issue to try to troubleshoot because it only comes up after several hours of uninterrupted driving.</p></blockquote><p></p>
[QUOTE="teamster, post: 1823318, member: 56176"] Hey folks, I have a weird issue that has come up a few times now, so it's time to do some digging. I've searched through as best I can and can't find anything that speaks to this specific issue. After about 8-9hrs of driving, of which about 5-6hrs is uninterrupted engine running time (i.e. straight interstate driving, no auto-off or other engine stops), my 2017 transmission starts to run into power and shifting issues going in and out of 8th gear. [B]Context:[/B] Issue only appears when vehicle has been operating without break for several hours at highway speeds. Shorter interstate trips of less than 4-5hrs does not seem to induce the issue. Long trips with interruptions where the vehicle is power cycled seem to forestall the issue. Issue only seems to present after segments of 4-5hrs without break. [B]Behavior:[/B] Truck will be driving steadily at 70-75mph, and accelerator is depressed (e.g. to pass a vehicle). The truck pauses a moment before hard shifting down into or past 8th, with a distinct "bump" or lurch feeling before power is applied. The acceleration is not even, and is noticeably reduced compared to regular acceleration. The bump/lurch can be replicated by manually shifting in or out of 8th gear, both up into 9th and down into 7th. [B]Temporary Resolution:[/B] Stopping the vehicle and cycling the ignition with a short (less than ten minutes) break before resuming operation seems to resolve the issue. This issue has come up twice, both times in the last two weeks. Any thoughts on what this might be? The fact that I can get temporary resolution by cycling the ignition suggests to me that it's likely a software issue. This is a frustrating issue to try to troubleshoot because it only comes up after several hours of uninterrupted driving. [/QUOTE]
Insert quotes…
Verification
Post reply
Staff online
Griffin
Administrator
Members online
CSP
riodecolumbia
Mossy 150
Rednose
Pnwrider
MagneticScrew
Harry P Ness
Badgertits
Blakelabate
willwwright
MarkOne
Raptor R
Tornink
Hultzger
MCJEFE
BadWRP
sambhutta
Wristdoc
GilzWetTrain
Corsarych
tcm glx
poofyo101
Braaaaptor
kyle117
VJDWashington
TwistAir
jdm_sixtwo
Kronos2300
Aird_outSRT
Griffin
HighwaySentinel
tor
RiskTkr
valley3
BoostCreep
alecb354
shigman
dalejrthecat
CDN_Raptor
never_summer
Utexmed
someday
krmzn
Dbone
Swifty
bobbyph1
WRalstonB
jm77
Stingray23
LibertyDNP
... and 9 more.
Forum statistics
Threads
93,157
Posts
1,954,935
Members
56,433
Latest member
teck27
Forums
GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2017 lurching in and out of 8th gear after long drive cycle
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top