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gleidy
Dodge Dakota
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3/15/2005
11:00:00
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 Subject: 89 Dakota 4WD CAD problem
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Message:
I have 1989 Dak 4x4 where sometimes the 4wd light comes on where I shift into 4lo or 4hi but the front hub is not engaged. I have verified that the driveshaft from the t-case to front differential is turning.
So I think I have narrowed it down to one of the
following:
1) Marginal vacuum from tcase to CAD
2) CAD is working intermittently.
I always thought the 4WD light indicated that the front hubs were engaged but there seems to times
where the CAD malfunctions and turns on the 4wd lamp even though the front hubs are not in.
Does anyone know the amount of vacuum pressure that should exist at the CAD?
Walt's 4wd page has been very helpful.
http://www.walt-n-ingrid.com/modifications.html#4x4
Any other suggestions are welcome.
Thanks,
Glenn
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gleidy
Dodge Dakota
JOIN HERE
3/15/2005
13:24:16
| RE: 89 Dakota 4WD CAD problem
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Message:
Also intermittently, when the 4WD shift lever is 2WD the truck stays in 4WD.
I am confused at this point.
Glenn
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gleidy
Dodge Dakota
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3/15/2005
13:28:58
| RE: 89 Dakota 4WD CAD problem
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Message:
I forgot to add the truck really is in 4WD (which becomes a problem on dry pavement) when the lever is in 2WD.
Glenn
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Walt_Felix
Dodge Dakota
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3/15/2005
18:05:13
|  RE: 89 Dakota 4WD CAD problem
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Message:
I was just about to make and add a couple of troubleshooting flowcharts to update that page with some additional info I have come up with. For now, if you have a vacuum gage, the amount of vacuum at the disconnect should be between 10-20 in. hg.
__________________
Walt Felix
http://www.Walt-n-Ingrid.Com
http://dodgetruckworld.com/waltfelix
Note: I very frequently get email from people asking about the lift kit in my ’88. Typically, I will NOT respond to the emails (about 95%) that ask questions I’ve already covered on my web pages (ie. Where did you get the kit?, Who makes it?, How much did it cost?, What modifications did you have to make to get it to fit your truck?. How hard was it to install? What problems did you encounter? etc, etc...)
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Walt_Felix
Dodge Dakota
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3/15/2005
18:51:35
| RE: 89 Dakota 4WD CAD problem
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Message:
This flow chart should help.
__________________
Walt Felix
http://www.Walt-n-Ingrid.Com
http://dodgetruckworld.com/waltfelix
Note: I very frequently get email from people asking about the lift kit in my ’88. Typically, I will NOT respond to the emails (about 95%) that ask questions I’ve already covered on my web pages (ie. Where did you get the kit?, Who makes it?, How much did it cost?, What modifications did you have to make to get it to fit your truck?. How hard was it to install? What problems did you encounter? etc, etc...)
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gleidy
Dodge Dakota
JOIN HERE
3/15/2005
22:36:09
| RE: 89 Dakota 4WD CAD problem
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Message:
Thanks for the information, Walt. I think
it will help in resolving the front hub problem.
I just had the t-case rebuilt ( chain broke ).
I thought I got a good deal on it for $400 but
perhaps I got what I paid for as intermittently
it stays in 4WD even when the lever is in the 2WD
postion ( I can tell by the road noise on turns and 4WD lamp ). I think this problem has to be
with the t-case itself.
Tommorow it goes back to the shop.
Glenn
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Dalep1115
Dodge Dakota
JOIN HERE
10/03/2005
01:25:27
|  RE: 89 Dakota 4WD CAD problem
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Message:
Please post the results and what it took to resolve. I have a 92 dakota and it is doing the same as yours. Any help would be greatly app!
Thanks, Dale
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Super-bee
Dodge Dakota
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10/03/2005
12:52:12
| RE: 89 Dakota 4WD CAD problem
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Message:
replace the vacuum switch on the transfer case, sometimes it can stick
also, when shifting out of 4x4 sometimes i find you have to put the truck in neutral to get it to shift out
i wonder why they didnt put the CAD on the genII daks? now im going to have to rig up something to turn it on and off when i put the t-case from the 95 in
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Super-bee
Dodge Dakota
JOIN HERE
10/13/2005
00:33:27
| RE: 89 Dakota 4WD CAD problem
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Message:
or just go here and wait for the kit for our trucks
http://www.4x4posi-lok.com/index.html
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Walt_Felix
Dodge Dakota
JOIN HERE
10/13/2005
19:46:27
| RE: 89 Dakota 4WD CAD problem
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Message:
Posi-Lok doesn't make a kit for the Dakota.
__________________
Walt Felix
http://www.Walt-n-Ingrid.Com
http://dodgetruckworld.com/waltfelix
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Super bee
GenI
10/18/2005
14:34:36
| RE: 89 Dakota 4WD CAD problem
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Message:
i said or jsut go here and WAIT for the kits for our trucks, they are in development, see
http://www.4x4posi-lok.com/resdev.html
"What's Coming
87-96 Dodge Dakota w/ C.A.D.
Toyota Tacoma & 4Runner"
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duffy
Dodge Dakota
JOIN HERE
10/28/2005
08:51:14
| RE: 89 Dakota 4WD CAD problem
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Message:
my 95 does it sometimes too. when first going into 4hi, it doesnt want to stay in. once it stays in 4hi, it doesnt want to go back into 2hi. the solution i've found is to hold the lever in 2wd and spin the tires a bit on the grass, mud, etc...then she'll stay in 2hi.
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Walt_Felix
Dodge Dakota
JOIN HERE
10/28/2005
15:50:50
| RE: 89 Dakota 4WD CAD problem
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Message:
I didn't realize that was still listed on Posi-Lok's website but it's been there, listed as "in development", for a few years. They never came out with it and when I last inquired about the status, a couple of years ago, the person I spoke with said they were not going to pursue it. One thing was it was such a small market it didn't justify the R&D cost because only the 87-90 Dakota has a CAD, 91 and later doesn't. I was told by their guy, they didn't feel there would be enough demand for the application, so the project was dropped. As to why it's still listed on their site, I don't know but most manufactures will not put the effort into developing a product that will only sell a handful of units.
__________________
Walt Felix
http://www.Walt-n-Ingrid.Com
http://dodgetruckworld.com/waltfelix
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Super bee
GenI
10/29/2005
00:59:20
| RE: 89 Dakota 4WD CAD problem
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Message:
DAMNIT
well, thanks for the info Walt, now i guess i will have to run some vacuum lines and find a switch for them, the new T-Case lacks the vacuum switch, and its a lame setup anyway
hhmmm, i might be able to custom fab one though
any ideas?
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terry
Dodge Dakota
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2/01/2008
02:52:44
| RE: 89 Dakota 4WD CAD problem
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Message:
dear sirs/madam, can anybody show or explain how to replace the vacuum switch on the transfer case on a 1988 dakota le 4wd. would really appreciate the help. thanks.
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Walt_Felix
Dodge Dakota
JOIN HERE
2/04/2008
11:29:33
| RE: 89 Dakota 4WD CAD problem
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Message:
Unscrew the old one and screw the new one in. It's a simple unit with a threaded end. Looks kind of like an oil pressure sending unit but has 4 vacuum hoses connected to it. The fitting with the hoses are keyed to only go on one way.
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