Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
New showcase items
New showcase comments
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Showcase
New items
New comments
Latest content
Latest reviews
Latest updates
Search showcase
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Power Strokes
6.4 Aftermarket
Tranny acting weird
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
[QUOTE="Mark Kovalsky, post: 562520, member: 1654"] When the trans is colder than 0°F it uses 4th (1.09:1 ratio) instead of 5th (1:1 ratio.) It does this because it is MUCH easier to do a 3-4 shift instead of a 3-5 shift. At cold temps we couldn't get the 3-5 shift to work right every time. So cold it shifts 1-2-3-4-6. Once it warms above 0°F it shift 1-2-3-5-6. It will use 4th gear at any temperature in a certain case. If the truck speed is too high to shift to 3rd gear when you floor it, it can select 4th instead of 5th. There is a very narrow window of speed that it will do this, once it gets several MPH above this speed it will go to 5th, not 4th. The reason for this is that it gives 9% more torque to the wheels than if it was in 5th, plus the engine is spinning a bit faster. That also gets some more torque. If it does select 4th it can only upshift to 6th or downshift. It never, ever will shift 4-5 or 5-4. [/QUOTE]
Insert quotes…
Verification
Post reply
Random media
Latest posts
450 performance issues
Latest: 6.0 Tech
Thursday at 9:19 PM
7.3 Tech
6
02 F250
Latest: 6.7powersmoke
Thursday at 10:50 AM
7.3 Tech & FAQ
D
2000 7.3 stalls, wif, wts, and ses lights come on
Latest: DissleDoctor
Thursday at 6:02 AM
7.3 Tech & FAQ
04 ex w/low hpop pressure
Latest: gwunter
Jun 5, 2024
6.0 Tech
7.3 lift
Latest: Charles
Jun 4, 2024
7.3 Aftermarket
Members online
cmann250
Raider4044
LivinAnAdvntr
Forums
Power Strokes
6.4 Aftermarket
Tranny acting weird
Top