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Transmission question


Old 08-06-2018, 05:23 PM
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Join Date: Aug 2018
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Default Transmission question

New to the group. I have a 2005 Pacifica Limited that's done well since we bought it. Just turned 100k and started throwing a P0740 code. I reset the code, then drove it to see if there was any noises, and accelerated slowly and rapidly to see if the speed lagged. Nothing out of the ordinary occurred. Probably drove it 300 miles, then when my wife was following me in it, as we pulled into our neighborhood and stopped briefly, it wouldn't move. With the engine on, it's like it's stuck in Park. If the engine is off with the car in neutral, it can be pushed. Before I had it towed to the dealer, I checked the codes and got the P0700 on the engine, then P0740, P0720 and P0715 on the A/T, so the input and output were now coding. The dealer did a check and said it needs a new transmission, but the boards all have various electric/electronic issues that might be culprits as well. I have a couple other techs I trust who think there's something internal wrong when I tell them that it moves with the engine off but locks up with the engine on, so it may be that the trans. is shot. Vintage Parts is the only place to get a new transmission (I used them in my days at Caterpillar, so I know how they work), and the local Cottmann rebuild shop gets good marks from the techs I trust. Vintage will be about $5500 which is more than I'm willing to pay, Cottmann will probably be in the $3000 range by the time I'm done.
Wondered if anyone has any experience that I might try to see if there's anything other than replacing it. I've not tried the junk yards, but that's an option also, but I'd still need someone to do the remove/install, so I might end up just about as much as the Cottmann expense.
Thanks in advance for any thoughts, experiences or knowledge anyone can provide. I'm not sure which transmission is in it, but I could look over the VIN.
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Old 08-09-2018, 08:40 AM
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Join Date: Feb 2018
Location: Iowa
Posts: 15

How's the transmission fluid? I'd drop the pan & see what we have for debris before condemning the transmission. Not saying the techs aren't correct, but mine (with the same codes) was the TIPM.
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Old 08-09-2018, 11:55 AM
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Join Date: May 2008
Location: Detroit suburb
Posts: 4,877

With all due respect to the guys at the dealership, dealer mechanics are taught how to "remove and replace". I doubt that 1 in a hundred dealerships has a "transmission guy" on board who knows how to diagnose, tear down and actually fix a transmission. Most dealerships, if they can't talk the customer into replacing the transmission, will subcontract the repair to a trans shop, where they do that kind of thing all day, every day. If I were you, I'd get the car into a transmission shop and get an expert opinion.
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