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  #229  
Old 05-13-2013, 12:30 PM
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I read about the recall today. Service announcements won't be sent out until June, though. My dealer said to wait until I get something in the mail before bringing it in.

I too get this shuddering around 40mph, and I hope the computer flash solves something.
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  #230  
Old 05-13-2013, 03:12 PM
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Re: Surging, pulsing while driving

Would they know to send mail to me about when to bring it in? I am not original owner.
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  #231  
Old 05-13-2013, 03:30 PM
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They should, when you buy a car the vin number transfers to new owner.
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  #232  
Old 05-16-2013, 11:34 AM
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Re: Surging, pulsing while driving

The recall isn't related at all to the shutter. The recall is for jeeps rolling away in neutral or something crazy. For the stuttering, they need to move the partial-lock on the torque converter to a higher speed and/or gear, as they've done in the past with the TSB. But it's still not a 100% solution, in my opinion.

From WK Jeeps:
"The torque converter clutch is electronically modulated and provides for partial engagement in third, fourth or fifth gears. This results in improved shift feel, fuel economy, driveability and transmission cooling. It can be used at lower speeds to provide benefits over a broad speed range. The system unlocks the torque converter when optimal performance is required."

Sounds good in theory, but really just gets in the way and causes pulsing in my experience.
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  #233  
Old 05-16-2013, 01:35 PM
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Re: Surging, pulsing while driving

I know the recall isn't for the shuttering. But if the recall is for a cracked circuit board on the Tcm. Maybe it can be related to my problem.

Quote:
Originally Posted by Kayak83 View Post
The recall isn't related at all to the shutter. The recall is for jeeps rolling away in neutral or something crazy. For the stuttering, they need to move the partial-lock on the torque converter to a higher speed and/or gear, as they've done in the past with the TSB. But it's still not a 100% solution, in my opinion.

From WK Jeeps:
"The torque converter clutch is electronically modulated and provides for partial engagement in third, fourth or fifth gears. This results in improved shift feel, fuel economy, driveability and transmission cooling. It can be used at lower speeds to provide benefits over a broad speed range. The system unlocks the torque converter when optimal performance is required."

Sounds good in theory, but really just gets in the way and causes pulsing in my experience.
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  #234  
Old 05-29-2013, 01:15 PM
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Re: Surging, pulsing while driving

So if the electronic lockup clutch is the issue, what is causing the trouble? Is it a corroded connections somewhere causing a bad electrical signal? Perhaps that causes it to not lockup as firmly as it should, or causes it to disengage sporadically? This issue is obviously something that develops over time/mileage. Is adjusting the factory settings really the best answer? I am hesitant to take my jeep to the dealer for anything...especially something like this.
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  #235  
Old 05-29-2013, 01:22 PM
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Quote:
Originally Posted by 06overland View Post
so if the electronic lockup clutch is the issue, what is causing the trouble? Is it a corroded connections somewhere causing a bad electrical signal? Perhaps that causes it to not lockup as firmly as it should, or causes it to disengage sporadically? This issue is obviously something that develops over time/mileage. Is adjusting the factory settings really the best answer? I am hesitant to take my jeep to the dealer for anything...especially something like this.
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  #236  
Old 05-29-2013, 01:52 PM
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Re: Surging, pulsing while driving

OK, lets look at the facts:

Madanio24: 3.7L with the W5A580 trans
hummer recovery team: 4.7L with the 545RFE trans
06overland: 5.7L with the 545RFE trans

What do they all have in common?

It seams that this electronically modulated converter clutch is a real possibility. I can't say for sure but I think both transmissions have this system.

I think we need to investigate where we can tap into and monitor the signal to the clutch while replicating the issue. Does anyone know where the signal to this clutch comes from, where it is exposed for probing, and what type of signal it is?

I know, the dealer has a scanner for this...I'd much rather see a multimeter on my lap with real data.
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  #237  
Old 05-29-2013, 05:24 PM
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My 2005 limited 5.7 sometimes surges when in cruise at around 95 kph. rpm go up to about 2400 then drop back to normal then Back up in about a 5 second cycle and I wonder if the problem could be related to yours.
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  #238  
Old 05-29-2013, 10:17 PM
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Mine has not done this since my rebuild.
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  #239  
Old 06-04-2013, 11:51 AM
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Re: Surging, pulsing while driving

I see, do you know if the surging was gone before your tcm was replaced? Or was it all done at the same time?
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  #240  
Old 06-04-2013, 12:30 PM
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All done at same time, and I didn't have tcm replaced it was reprogrammed, the 545 rfe doesn't have a tcm but a PCM that controls the tranny
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