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 Post subject: Shift Pattern
PostPosted: Wed Feb 14, 2007 11:41 pm 
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I need someone to please explain the shift patten to me as the dealer is unsure what or when is supposed to happen and how? Mine does the following:
1st- hard off the line (good)
2nd- loose and sloppy
3rd- loose and sloppy
4th- loose and sloppy
5th- TC lockup, drops 1000rpm (good) 50mph (dealer says this 4th TC lockup)
6th- TC lock up, drops a final 300rpm (good) 62mph, it never did this till 8000mile ile mark (dealer says this is 5th lock up)

OK, now it never used to drop a final 300rpm at 62 mph, this was new a couple thousand miles ago. The dealer is getting the specs and when it should shift data from DC. I need to understand this as 62mph O/D makes no sense and if the tranny does indeed shift 4 lock up to 5 lock up why then not create a manual automatic and have all gears go through tc lockup. I'm getting frustrated with this....My transmission clearly goes to 4th sloppy and then lockup, so if that's 4th Tc lockup, why does it not go to 5 sloppy then lockup? I hope you technical minds know what I'm trying to say?
One more thing, technical parts changer agreed with road test today with me that 50mph was 5th tc lockup O/D. He then took another buddy with the Star scanner and came back to report that Star says the 50mph is 4th lockup and 62mph is 5th lockup. The 62mph for O/D if thats correct is way off the map if it's designed that way IMO, remember it just recently started doing this. Are your trannies like this and does anyone have data?

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 Post subject:
PostPosted: Wed Feb 14, 2007 11:59 pm 
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I started driving my CRD a little less conservatively and it shifts way different. The shifts are much more firm. Before if I was really careful and slowly spead up sometimes it would have a really really hard shift that bothered me. Also the shifts were a little loose for my taste. I would suggest giving it a little more foot and see how the tranny acts.

My normal commute to work is at 50mph which puts my RPM's at 1900 and under cruise control it the RPM's go up and down like mad at every hill. But if the crazies are off the roads and I can go at least 54 mph the TC locks up and sits around 1700rpm's the entire trip. It goes right up a hill that every gas car I see slows down for. (Gotta love Diesel Power)

I wish the CRD had a tow/haul mode that would lock the TC as much as possible. It just bothers me that I'm getting 20mpg at 50mph and 24-25mpg at 55mph.

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 Post subject:
PostPosted: Thu Feb 15, 2007 12:55 am 
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On my '05, it does a little different. Last lockup is at 58 mph, will drop back into lower gear if you go below 55 mph. 50 mph lockup is the same. Build date on mine is May '05, and haven't had F37 done.

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 Post subject:
PostPosted: Thu Feb 15, 2007 9:04 am 
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First, you are going to have a hard time explaining to DC that you have 6 forward speeds. I think that the TC only locks up in 4th OD and 5th OD. 50-55mph and 60-65mph are about right (depends on how you are accelerating). The "sloppy" that you describe is what DC does to take it easy on internal parts...but this slip can cause the tranny fluid to run hot...just a trade off.

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 Post subject:
PostPosted: Thu Feb 15, 2007 9:35 am 
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Your dealer is correct with the shift pattern. My 06 (Feb build date) does the same but the lockup point for 4th is slightly different.

1st- hard off the line (good)
2nd- loose and sloppy
3rd- loose and sloppy
4th- loose and sloppy
4th- TC lockup, drops ~500rpm @ 56mph
5th- TC lock up, drops a final 300rpm @ 62mph

I don't believe it will run in 5th without the TC locked.

You can also get the TC to lock in 3rd by turning OD off.

The interesting thing is that you are locking up in 4th at a significantly lower speed than me. This is closer to the speed that my TC unlocks in 4th as I slow down.

The pre-recall 05's are different so don't try to compare.


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 Post subject:
PostPosted: Thu Feb 15, 2007 10:26 am 
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Good post. I've been trying to figure out what's going on since I bought it. Mine is a May '06 build and the tranny used to shift to top gear/lockup at 55 then the F31 TSB was done and the shift points changed to the 62 lockup. This makes me think that DC really did the major programming change at that time and the F37 is something else.

I will note that turning off the OD acts an awful lot like using the tow/haul button on my GC. I keep wondering if the DC engineers "borrowed" that program because the shift points and TC lockup sure seem differant then when OD is engaged.

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 Post subject:
PostPosted: Thu Feb 15, 2007 11:31 am 
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Mine is a May 05 build and it locks up at 58 mph and unlocks at 55 mph. Haven't had the F37 done and don't plan to have it done unless the tranny goes south. :evil:


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 Post subject:
PostPosted: Thu Feb 15, 2007 1:20 pm 
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Location: Colorado Springs, CO
My '05 behaves similarly to what you describe. It will go into lockup in 4th at 50 mph and then 5th lockup at 61 mph. Before F37 it would go into lockup at slower speeds. It's frustrating now b/c if I'm going to travel for a while between 45 and 50 mph, I have to deliberating get past 50 mph to get it into lockup and then reduce my speed. Otherwise, it would just run indefinitely in 4th spinning away at 1900 or 2000 rpm. Hate F37!


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 Post subject:
PostPosted: Thu Feb 15, 2007 1:31 pm 
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You could run it with the O/D off until you get to 52mph. The transmission will no longer hunt for a gear if you do that. If I remember, you should be at about 2100rpm at that speed.

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 Post subject:
PostPosted: Thu Feb 15, 2007 4:34 pm 
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litton wrote:
Good post. I've been trying to figure out what's going on since I bought it. Mine is a May '06 build and the tranny used to shift to top gear/lockup at 55 then the F31 TSB was done and the shift points changed to the 62 lockup. This makes me think that DC really did the major programming change at that time and the F37 is something else.


Mine is a January 06 build date. I've not had F-31 done and and it's not subject to F37 and it has always, after warmed up, done the final shift/lockup at 62 mph. It also does a shift up at around 55. The only flash update I've gotten was the BCM back in June 06. I think doing the final lockup in top od at 55 would be way too low of a rpm. Mine turns just beow 2k rpm's at 70 mph. On a mild accelleration it seems to want to hold the rpm's at between 1500 and 1700 rpm's. I think anyless would be lugging the engine.

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 Post subject:
PostPosted: Thu Feb 15, 2007 4:56 pm 
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Joe Romas wrote:
litton wrote:
Good post. I've been trying to figure out what's going on since I bought it. Mine is a May '06 build and the tranny used to shift to top gear/lockup at 55 then the F31 TSB was done and the shift points changed to the 62 lockup. This makes me think that DC really did the major programming change at that time and the F37 is something else.


Mine is a January 06 build date. I've not had F-31 done and and it's not subject to F37 and it has always, after warmed up, done the final shift/lockup at 62 mph. It also does a shift up at around 55. The only flash update I've gotten was the BCM back in June 06. I think doing the final lockup in top od at 55 would be way too low of a rpm. Mine turns just beow 2k rpm's at 70 mph. On a mild accelleration it seems to want to hold the rpm's at between 1500 and 1700 rpm's. I think anyless would be lugging the engine.




Mine does the final lock at 64 mph. At 60 mph, it is barely below 1700 rpms. It sounds fine, but when I go up a hill at this speed, it will stay engaged but lug a little. It will drop out at 57 mph.

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 Post subject:
PostPosted: Thu Feb 15, 2007 5:11 pm 
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when i got the CRD I had the same sloopy thing with the 4th and 5th. And I noticed also that the 4th was only engaged between 50 and 60 then the 5th takes over with the tc unlock and locked. I went to get the F37 recall and now it so nice. Now you can really use the 4th and 5th and the 5th now has the tc locked up.
I did a small video on another post for the sift pattern from 0 to 80 I posted the video on youtube. I hope this can help you.

http://youtube.com/watch?v=W61S2fTHhX8

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 Post subject:
PostPosted: Fri Feb 16, 2007 12:00 am 
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Sounds sorta like the same thing. Then if this is correct, the OD off is in fact 3rd with 3rd TC lockup. That means with OD off you loose two gears?

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 Post subject:
PostPosted: Fri Feb 16, 2007 12:39 am 
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Kellog13 wrote:
Sounds sorta like the same thing. Then if this is correct, the OD off is in fact 3rd with 3rd TC lockup. That means with OD off you loose two gears?


Correct.

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 Post subject:
PostPosted: Fri Feb 16, 2007 12:44 am 
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The 1th 2th 3th are the same the main difference is with the 4th and 5th
Before if you are at 50 you were in 4th then if you accelerate hard the 5th will engage at 60 with the tc unlocked and then slowly the tc would lock up as the rpm and speed increase. it was giving the effect like "spooling" and it had a spongy kind of effect.
After the recall, if i accelerate hard the 4th will go up to 80 and then the 5th shift. The 5th is always with a locked tc now. If i drive slow and trying to get in 5th, then now the 5th will shift only at 61-62 with locked tc and it will still in 5th as low as 57 around 1700 rpm then if you slow down a little it will shift to 4th. Now the odd zone between 50-60 is not there anymore and it is so much nicer like this no more "spooling"effect.
I hope this help

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 Post subject:
PostPosted: Fri Feb 16, 2007 1:26 am 
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Kellog13 wrote:
Sounds sorta like the same thing. Then if this is correct, the OD off is in fact 3rd with 3rd TC lockup. That means with OD off you loose two gears?


That seems to be the general consensus, looking at everyone's input.

If I'm going to be just puttering around town, where the fastest speed limit is 45 mph, I'll lock out OD before I even pull out of the driveway.

From what I've seen doing some checks with an infrared non-contact thermometer, the FSM is correct - being in lockup does significantly reduce tranny fluid temp. A 25 mile run at 70 to 75 mph in lockup produced temps nearly 20 degrees lower than a 10 mile run around town at 45 mph without lockup.

Especially during the summer in city traffic, such as Fabian has to contend with in Charlotte (I live 25 miles north and I pity anyone that has to put up with that traffic every day), it could help keep tranny temps down to acceptable levels.

Another advantage I've found is that I get a slight amount of engine braking until it drops out of lockup. This helps contend with the ebb and flow of in-town traffic, reducing the amount of time I have to be on and off the brake.

Nearly half of my 20 mile commute is a 45 mph section of highway. From memory, at 45 mph, it's virtually a wash as far as engine rpm, locked and unlocked. With OD locked out at 50 mph it's turning 2100 rpm.

To be honest, I would rather have the higher 5th lockup speed at 62 mph. On some of the hills I have to contend with in the 55 mph section of my commute, if I hit 58 mph and it goes into 5th lockup, it feels as if it's lugging up hill at that rpm, and have to drop below 55 to get it to drop back into 4th lockup. Gets a little tiresome sometimes "threading the needle" on that 3 mph window on a winding hilly country road.

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 Post subject:
PostPosted: Fri Feb 16, 2007 8:57 am 
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Kellog13 wrote:
Sounds sorta like the same thing. Then if this is correct, the OD off is in fact 3rd with 3rd TC lockup. That means with OD off you loose two gears?


Exactly. The definition of overdrive is where the gearing ratio is less than 1. For the 545RFE this applies to both 4th and 5th with ratios of 0.75 and 0.65 respectively.


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 Post subject:
PostPosted: Fri Feb 16, 2007 9:34 am 
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01-06 bd, and had F31 (NOT F37)

4th OD - Engages at 53 mph and will lock in unless I am pulling hard, then the rpms are up 200 or 300 until about 58.

5th OD - Engages at 64mph and always locks, will not downshift until 58mph.

It never locks up in town...usually maintains about 1500 rpm just cruising in town.

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 Post subject:
PostPosted: Fri Feb 16, 2007 9:51 am 
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retmil46 wrote:
Kellog13 wrote:
Sounds sorta like the same thing. Then if this is correct, the OD off is in fact 3rd with 3rd TC lockup. That means with OD off you loose two gears?


That seems to be the general consensus, looking at everyone's input.

If I'm going to be just puttering around town, where the fastest speed limit is 45 mph, I'll lock out OD before I even pull out of the driveway.

From what I've seen doing some checks with an infrared non-contact thermometer, the FSM is correct - being in lockup does significantly reduce tranny fluid temp. A 25 mile run at 70 to 75 mph in lockup produced temps nearly 20 degrees lower than a 10 mile run around town at 45 mph without lockup.

Especially during the summer in city traffic, such as Fabian has to contend with in Charlotte (I live 25 miles north and I pity anyone that has to put up with that traffic every day), it could help keep tranny temps down to acceptable levels.

Another advantage I've found is that I get a slight amount of engine braking until it drops out of lockup. This helps contend with the ebb and flow of in-town traffic, reducing the amount of time I have to be on and off the brake.

Nearly half of my 20 mile commute is a 45 mph section of highway. From memory, at 45 mph, it's virtually a wash as far as engine rpm, locked and unlocked. With OD locked out at 50 mph it's turning 2100 rpm.

To be honest, I would rather have the higher 5th lockup speed at 62 mph. On some of the hills I have to contend with in the 55 mph section of my commute, if I hit 58 mph and it goes into 5th lockup, it feels as if it's lugging up hill at that rpm, and have to drop below 55 to get it to drop back into 4th lockup. Gets a little tiresome sometimes "threading the needle" on that 3 mph window on a winding hilly country road.




I like the higher lock up speed, but it is kind of a pain around here where our secondary roads have a 60 mph speed limit. I have to get to 64, lock it up then coast back down to 60. Then set cruise. Most folks zip around me at 60, but they are speeders. I am not.

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 Post subject:
PostPosted: Fri Feb 16, 2007 10:08 am 
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Heck, around here....doing 30mph over the speed limit is the norm....not for me...but for everyone else it seems. I normally do about 5-10mph over and they still pass me like I am standing still.

My mother has a place in Florida...see my recent road trip milage report. Well, down there all the back roads and whatnot are 45, 55, and 60 mph...with passing allowed in most parts. Mind you these are two lane roads...and in one area...there is a 7" drop off where the shoulder should be because of construction...lol. It is fun though...when you think of Florida....you don't think of your prototypical country back roads. They are building up a little down there though. This is the Mandarin, Orangedale, Fruit Cove area of St. Johns county near St. Augustine.

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