Tranny Problem?
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Junior User
Joined: Nov 2005
Posts: 76
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From: Brazos County, TX
Tranny Problem?
2001 F-250 CC 4x4 LWB Auto
Almost every time but not every time, the transmission seems to hang when it's time to shift from Drive to ODrive. Definitely worse when the trans is cold.
If I run the RPM's up and then let off, most times it will shift up sometimes I have to repeat 2-3 times before it will shift.
So put your thinking caps on, pull out those unused manuals, and see if we can figure this out.
Fluid is Mobil 1, ~15K on fluid.
Maybe this normal, but I dont think so.
Almost every time but not every time, the transmission seems to hang when it's time to shift from Drive to ODrive. Definitely worse when the trans is cold.
If I run the RPM's up and then let off, most times it will shift up sometimes I have to repeat 2-3 times before it will shift.
So put your thinking caps on, pull out those unused manuals, and see if we can figure this out.
Fluid is Mobil 1, ~15K on fluid.
Maybe this normal, but I dont think so.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
I don't think it is normal either. When was the last time you changed fluid? How is the fluid level now? Does it smell bad? Can you drain the fluid and see what lies in the pan? Give BTS a call. I know you may or may not be in the market for his trans but I'll bet he will give you some advice.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
With only 15,000 on the fluid it shouldn't be bad, but i'd still check the level and see if it's burnt. The manual says check the fluid then hood it up to a computer for diagnostics. I drive a stick so I'm not much help here.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by F350-6
With only 15,000 on the fluid it shouldn't be bad, but i'd still check the level and see if it's burnt. The manual says check the fluid then hood it up to a computer for diagnostics. I drive a stick so I'm not much help here.
Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
Likes: 2
From: Charlotte-Fairbanks-Bflo
OD light is not flashing? Once these transmissions start acting up I've learned that the only route they know from then on is South. Not news you want to hear I know. Take it to a proper transmission shop and have the codes read by someone that is familiar with the 4R100. There is generally no charge for this service. Your best hope is that the problem is the shift solenoid, or a PCM problem. If not, a new transmission is in your very near future.
Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
What speed are you trying to go into overdrive? Mine will not shift up to OD till it hits 45mph. It will stay in OD until the speed drops back down to 40.
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Junior User
Joined: Nov 2005
Posts: 76
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From: Brazos County, TX
Ok,
I checked the fluid level - level was on the mark, nice pretty red in color, didn't smell, look, or taste burnt.
Not sure about the TC lockup, I can feel it shift into drive and then I wait for it to shift into OD.
When it doesn't I run the RPM's up and then back out of it quick, most times that makes it shift into OD, sometimes I have to do it 2 or 3 times before it finally shifts into OD.
I have been contemplating the BTS VB, but I can't even get time to install my Wicked Wheel or bypass filtration.
I checked the fluid level - level was on the mark, nice pretty red in color, didn't smell, look, or taste burnt.
Not sure about the TC lockup, I can feel it shift into drive and then I wait for it to shift into OD.
When it doesn't I run the RPM's up and then back out of it quick, most times that makes it shift into OD, sometimes I have to do it 2 or 3 times before it finally shifts into OD.
I have been contemplating the BTS VB, but I can't even get time to install my Wicked Wheel or bypass filtration.
Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
Likes: 2
From: Charlotte-Fairbanks-Bflo
Originally Posted by musthunt
Ok,
I checked the fluid level - level was on the mark, nice pretty red in color, didn't smell, look, or taste burnt.
Not sure about the TC lockup, I can feel it shift into drive and then I wait for it to shift into OD.
When it doesn't I run the RPM's up and then back out of it quick, most times that makes it shift into OD, sometimes I have to do it 2 or 3 times before it finally shifts into OD.
I have been contemplating the BTS VB, but I can't even get time to install my Wicked Wheel or bypass filtration.
I checked the fluid level - level was on the mark, nice pretty red in color, didn't smell, look, or taste burnt.
Not sure about the TC lockup, I can feel it shift into drive and then I wait for it to shift into OD.
When it doesn't I run the RPM's up and then back out of it quick, most times that makes it shift into OD, sometimes I have to do it 2 or 3 times before it finally shifts into OD.
I have been contemplating the BTS VB, but I can't even get time to install my Wicked Wheel or bypass filtration.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
I'm not sure if I understand your post entirely. Sorry for all the questions - just trying to vision the situation. But this is what you should be feeling, :
put in drive, then you should feel each shift and see the drop on the RPM guage
shift from 1st to 2nd
shift from 2nd - 3rd
TC lockup, feel like a shift
last shift 3rd to OD
is this what you feel when you a driving?
is the Overdrive light on the shift lever flashing?
put in drive, then you should feel each shift and see the drop on the RPM guage
shift from 1st to 2nd
shift from 2nd - 3rd
TC lockup, feel like a shift
last shift 3rd to OD
is this what you feel when you a driving?
is the Overdrive light on the shift lever flashing?
Thread Starter
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Junior User
Joined: Nov 2005
Posts: 76
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From: Brazos County, TX
Ok, superchips programmer shows no codes.
WB - I can feel 2nd - 3rd, not sure I've ever felt / noticed the TC lockup, then I'm waiting on 3rd to OD.
OD light has never flashed/blinked.
WB - I can feel 2nd - 3rd, not sure I've ever felt / noticed the TC lockup, then I'm waiting on 3rd to OD.
OD light has never flashed/blinked.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by musthunt
Ok, superchips programmer shows no codes.
WB - I can feel 2nd - 3rd, not sure I've ever felt / noticed the TC lockup, then I'm waiting on 3rd to OD.
OD light has never flashed/blinked.
WB - I can feel 2nd - 3rd, not sure I've ever felt / noticed the TC lockup, then I'm waiting on 3rd to OD.
OD light has never flashed/blinked.
Does the super chip programmer also read live data? If it does, try reading the transmission data and it will show if/when the TC locks up.
Post Fiend
Joined: Feb 2007
Posts: 7,191
Likes: 4
From: Blairsville,Ga
Originally Posted by white Buffalo
You should feel the TC lock up before shifting to OD, feels just like a shift.
.
.
finally figured out torque was slipping at lock up and shifting to fouth at the same time,but was shifting to OD
Thread Starter
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Junior User
Joined: Nov 2005
Posts: 76
Likes: 0
From: Brazos County, TX
Ok,
On my way to work in the morning I'll try to listen for the seperate shifts and pay attention this time.
I will report back either from work or when I get in tomorrow evening.
On my way to work in the morning I'll try to listen for the seperate shifts and pay attention this time.
I will report back either from work or when I get in tomorrow evening.
