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FazDak
GenII
3/15/2002
21:29:27
|
 Subject: 97 OD question
IP: Logged
Message:
My uncle has a 97 Dak 4wd auto and he tells me that his truck wont go into OD when its cold,only after he drives for a while and it warms up and that his owners manuel said that it was setup to be that way.
Is this true or is it a crock of $hit?
Thanks, Scott
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CW
GenIII
3/15/2002
21:52:29
|  RE: 97 OD question
IP: Logged
Message:
No this is true. Chrysler programed the PCM to not let the trans into O/D due to lack of lubrication when very cold. Don't think it is supposed to kick in until it is 0 out.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams.
Working on adjustable fuel pressure with return.
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FazDak
GenII
3/16/2002
17:59:07
|  RE: 97 OD question
IP: Logged
Message:
Thanks CW.
Thats sounds a little stupid.
What if you have to go highway speed right away, wont that be bad for the truck in the long run?
Thanks again, Scott
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Graphite
DakotaEnthusiast
3/16/2002
22:21:37
| RE: 97 OD question
IP: Logged
Message:
No. Your Uncles truck won't be ruined. You'll just not have o/d for a few mins while the transmission warms up
joe
someone pull me out please!
2002 club cab 4x4 Graphite /silver
2002 quad cab 4x2 Atlantic blue/silver
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CW
GenIII
3/17/2002
02:04:52
| RE: 97 OD question
IP: Logged
Message:
If you have to go at highway speed right away the only thing it hurts is your pocket book. The gas milage while in 3rd is horrendus.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams.
Working on adjustable fuel pressure with return.
|
Graphite
DakotaEnthusiast
3/17/2002
10:16:44
| RE: 97 OD question
IP: Logged
Message:
In your case CW, I bet it isn't that good in 4th gear either!!!
joe
someone pull me out please!
2002 club cab 4x4 Graphite /silver
2002 quad cab 4x2 Atlantic blue/silver
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CW
GenIII
3/17/2002
11:08:09
| RE: 97 OD question
IP: Logged
Message:
This one is better then my '97 4x4 auto 5.2 was. About 4-5 MPGs better.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams.
Working on adjustable fuel pressure with return.
|
FazDak
GenII
3/17/2002
11:10:40
| RE: 97 OD question
IP: Logged
Message:
Thanks guys.
What exactly does this help, i cant see any real advatage to it?
Thanks, Scott
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CW
GenIII
3/17/2002
11:33:15
| RE: 97 OD question
IP: Logged
Message:
LIke I say it is a lack of lubercation. The planetarys of the O/D require alot of lubircation to keep them happy. When the temp drops to much the oil thickens in the cooler and trans making it hard to get lubircation to the planetarys.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams.
Working on adjustable fuel pressure with return.
|
FazDak
GenII
3/17/2002
11:44:53
| RE: 97 OD question
IP: Logged
Message:
CW, is it like this on all Mopar products because mine goes into OD on cold days no problem?
If its not all Mopars then why did they do it on 89 Conquest's (he has one of those too) and then stop and then pick back up again on 97's?
Thanks, Scott
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CW
GenIII
3/17/2002
12:08:12
| RE: 97 OD question
IP: Logged
Message:
No they started that stupid thing in '96 or '97. Some were more sensitive than others.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams.
Working on adjustable fuel pressure with return.
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Todd W
Dodge Dakota
JOIN HERE
3/17/2002
14:51:50
| RE: 97 OD question
IP: Logged
Message:
I wouldn't worry about running at highway speed not in overdrive...
Think about it.
Two words.
Over - Drive
It's a gear, and it's ratio is 'over' that of the normal 'drive' gear, which is third. :0) It's a gas milage gear, plain and simple. My five-speed ran across kentucky, tenessee, and georgia in 4th (drive) towing a trailer at 85mph. Lowsy gas milage, no problems!
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Todd VV
Dodge Dakota
JOIN HERE
1/09/2004
23:38:39
| RE: 97 OD question
IP: Logged
Message:
I wouldn't worry about running at highway speed not in overdrive...
Think about it.
Two words.
Over - Drive
It's a gear, and it's ratio is 'over' that of the normal 'drive' gear, which is third. :0) It's a gas milage gear, plain and simple. My five-speed ran across kentucky, tenessee, and georgia in 4th (drive) towing a trailer at 85mph. Lowsy gas milage, no problems!
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chrisssxxx
Dodge Dakota
JOIN HERE
1/17/2006
19:13:00
| RE: 97 OD question
IP: Logged
Message:
change the oil for AMSOIL SYNTHETIC my dakota did the same and now it ok.....
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Tyler
Dodge Dakota
JOIN HERE
1/17/2006
20:07:17
| RE: 97 OD question
IP: Logged
Message:
Only time mine does this is when it's -15f or lower out. I live in northern Iowa so it gets cold out most years. Not this year though!!
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Bob Lincoln
Dodge Dakota
JOIN HERE
1/18/2006
09:08:15
| RE: 97 OD question
IP: Logged
Message:
"Like I say it is a lack of lubercation." Wrong.
"No they started that stupid thing in '96 or '97." Wrong again.
Read the Factory Service Manual. This applies to 1992 and probably earlier. It's to prevent mechanical stress on the torque converter due to thick oil, not lack of oil or lubrication. Standard torque converters are not welded together, they have interlocking metal cutouts and can be damaged by the stress of thick oil under heavy load. There's still lubrication.
The 1992 vintage models are designed not to shift into OD until the coolant temperature is above 60F. This can be attained quickly on most winter days (like, 1/4 mile of driving). They are designed not to lock up until the coolant temperature is above 140F. This can take me 3 miles in winter.
Later models (by 1997) use a temperature sensor inline on the tranny cooling line to the radiator. Temperature limits may be slightly different, but the philosophy is the same.
Gas mileage can suffer, but when my OD solenoid wasn't working, I found gas mileage dropped from 20 to 17. Not a horrendous change. Revs at 65 went from 1800 to 2600, that's what's not desirable. But when towing sometimes you have to turn OD off.
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lowpar
Dodge Dakota
JOIN HERE
1/18/2006
16:12:31
| RE: 97 OD question
IP: Logged
Message:
yeah
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