05 Jeep Grand Cherokee Limited 245 T case FIXED

gsferraro
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by gsferraro » Tue Jul 22, 2014 4:23 pm

Thanks Bob i will read that info tonite. The vin for the jeep is,1J4HR58N95C546169

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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by barrycole » Tue Jul 22, 2014 4:25 pm

Gray, the issue will be more in the transfer case, as the diffs are along for the drive. We found that the clutch pack chattered and caused the truck to bind, Its like the old days were customers, drove their pickup around, on dry pavement, and wondered why the truck bucked all over the road. Barry
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by tranibob » Tue Jul 22, 2014 4:41 pm

Thanks for the VIN.

Looking up the principle of operation it does use the wheel speed sensor to figure out if the clutch in the transfer case should be applied or not. Under normal circumstance it sends 48% to the front and 52% of the torque to the rear. As it detects slippage in the front or rear wheel it applies to clutch to transfer the torque to the wheels with traction. So those front and rear differential % PID you see might have to do with how much it sends to each differential, I really don't' know i would have to see the data to figure it out. But one thing for sure there is only one clutch pack and it is in the transfer case and it is applied by a PWM motor varying the duty cycle %.
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by barrycole » Tue Jul 22, 2014 5:18 pm

Yes the % of torque to either diff will make a diff! But this is not a diff problem as it changes hot or cold!
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by tranibob » Tue Jul 22, 2014 5:39 pm

Did not mean to sound like it somehow was a diff issue Gary, just trying to explain the principle of operation and what the scanner PIDs could be about.
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by gsferraro » Tue Jul 22, 2014 5:57 pm

Thanks bob,
I think as a test the motor was unplugged and it still chattered,(i would have to ask to make sure)

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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by tranibob » Tue Jul 22, 2014 6:03 pm

That sure would confirm it is in the transfer case. Realistically 99% chance it is in there, but since someone told you it might need a computer re-flash I looked into other possibilities and suggested looking at the data when it is acting up versus when it is not just to eliminate the external controls as a possibility.
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Sonnax Industries, Inc.
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by barrycole » Tue Jul 22, 2014 9:37 pm

Not to be out of line here, but u have a internal case problem ( clutch pack) . Hope everyone is ok with what I feel is the problem! Don't want to stir the sh%^. Barry
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by dhritsko » Wed Jul 23, 2014 8:33 am

Barry , you got my vote
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Re: 05 Jeep Grand Cherokee Limited 245 T case

Post by gsferraro » Wed Jul 23, 2014 9:48 am

Hello all,
Just spoke with a tech at jeep, he said as long as the correct fluid,tire size and air pressure are good. Go into a parking lot make 8 right turns,8 left turns. If it still chatters its inside the unit. I will keep everyone updated as i work on it. Thanks for all the input and i will keep you all posted. Gary

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