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Old 01-24-2017, 11:36 AM   #21
floridasl22002
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2003 L-Series 3.0L Sedan
Default Re: L300 Intermittent Hard Transmission Shift

I don't whether this will help you at all. It is a video of the tear down of the 4T40E box. The 4T45E is identical. This is the 2nd video I have watched by this guy. I am in awe of his knowledge and expertise.

Whilst you would not dismantle to the same extent, once he has the side panel cover off he shows you the various solenoid locations and also explains why one in particular always burns out (lack of lubrication due to the dumb design).

As you will see actually replacing the solenoids is so easy peasy. It's dismantling everything to get to them and putting everything back together again that is the PITA.

https://www.youtube.com/watch?v=2WzF1q3hZHs

Enjoy!

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Old 02-03-2017, 01:36 PM   #22
Sky Pilot
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2003 L-Series 3.0L Wagon
2008 SKY Red Line
Default Re: L300 Intermittent Hard Transmission Shift

I had the same problem for about a year and while I can't say for certain it was the culprit or merely a coincidence, but my issue went away when I had my radiator replaced; and that was a year ago and no hard shifting since then.. I'm just sayin'...

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Old 02-12-2017, 01:35 PM   #23
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Default Re: L300 Intermittent Hard Transmission Shift

Thought I would update. My husband replaced all 4 solenoids and the pressure control plate. He said they were all in spec BUT it looked as though the O rings may have been wore down or maybe the pressure plate was bad. It was a 2 day job and I had to buy him beer, make him dinner and a full massage for two days
So far it's running great, we took her up a large hill several times and she ran perfect, even in warmer weather and after a round trip of 200 miles. I'll keep you posted!
Just an FYI, he said he would NEVER do that job again, it sucked.

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Old 02-12-2017, 05:43 PM   #24
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Default Re: L300 Intermittent Hard Transmission Shift

Well Done!! We all really appreciate it when the OP updates us on what the final outcome is.

Enjoy

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Old 09-30-2019, 08:35 PM   #25
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Default Re: L300 Intermittent Hard Transmission Shift

I went to transmission shop with a diagram of the removed side case showing all of the solenoids. The owner plugged in the good computer and it was max pressure fail. That means not the solenoids and new tranny for $1650. It is a 2001 LW300 with 129k miles

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Old 10-01-2019, 03:04 PM   #26
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Default Re: L300 Intermittent Hard Transmission Shift

^ I find this info difficult to understand and/or believe. When you state max pressure fail, do you mean zero to low pressure from the xmission or maximum pressure is seen on the computer? With 129k miles, your LW300 is no different from many L-series vehicles insofar as xmission issues. Most xmission issues are about pressure control solenoids, failing while hydraulic pressures from the internal pump rarely fail. You may be the only one to have pump failure to require a rebuild. If that's the case then why not ask the repair shop on costs to replace the xmission with a used one? There must be plenty of them lying on shelves or in cars all over the country with Saturn being discontinued since 2010. It may be cheaper to throw in a used xmission instead of rebuilding yours. This presumes the xmission pump failed.

Electronically controlled xmissions use pressure control solenoids, counting on full pressure from an internal pump and electronics to vary solenoid travel. Varying solenoid travel modulates oil pressures too create smooth shifts. Virtually everyone here has replaced solenoids to correct xmission issues.

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Old 10-02-2019, 02:23 PM   #27
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Default Re: L300 Intermittent Hard Transmission Shift

Quote:
Originally Posted by Garciavision View Post
I went to transmission shop with a diagram of the removed side case showing all of the solenoids. The owner plugged in the good computer and it was max pressure fail. That means not the solenoids and new tranny for $1650. It is a 2001 LW300 with 129k miles
Sound like you are being taken for a ride. Get another opinion.

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Old 10-07-2019, 12:42 AM   #28
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Default Re: L300 Intermittent Hard Transmission Shift

Quote:
Originally Posted by Garciavision View Post
...new tranny for $1650. It is a 2001 LW300 with 129k miles
A new transmission for $1,650 - if true - would be a steal, but would only be the cost of the unit and not include the labor to install it. I realize that I'm not the one spending the money here, but I agree with soulsurvives that it would be worth getting a second opinion.

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320,000 miles - Holy canolli!
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Gov't's grown bigger, but a chance exists that it will be reduced. I'm cautiously hopeful.

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Old 10-07-2019, 10:15 AM   #29
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Default Re: L300 Intermittent Hard Transmission Shift

Sorry to appear the cynic, but $1650 for a tranny + installation cost would make the tranny worth about 3 times more than the car as whole. I would suggest standing back and looking at the overall picture of continuing ownership of that vehicle. The cost far out weighs the benefit.

My son's 2003 L300 shortly after purchasing it 5 years ago for $2100.00 began the hard shift/service engine light issue. We had it checked out by a tranny shop who recommended replacing the tranny for $2000.00. I told the guy it wouldn't happen as I'd paid $2100 for the whole car. He advised us that the car could continue like that for a good while and when it was getting worse, would go into self protection, limp mode. It ran fine with that issue for over 2 years, then I researched and concluded replacing the pressure and shift solenoids would likely fix the issue. I di the job myself, despite never having tackled a tranny, let alone an auto before. All told the cost in parts was about $150.00 and over 2 years later, the car runs and shifts perfectly. BUT I would not have spent $2000.00 to swap the tranny. I would simply have sold it on 'as is'.
Moral in all this, is know when to cut your losses!

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