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 Post subject: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 7:11 pm 
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My Automatic automatic transmission is not switching gears. Actually it is not switching from 3rd to 4th gear I think. What happens is that the RPM's go really high after 3rd when trying to switch to 4th and the engine suffers a lot. After a few seconds, it switches but don't know what can be happening here. Actually this is something that happened 2 months ago, and now after using the 4WD just a little bit it started happening again. 4WD was also not working right. it was making a lot of noise and sometimes when switching to 4WD, the gear was not even engaged. Some days. it works ok. Don't know why. The transmission fluid level is ok.
What could it be?

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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 8:57 pm 
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It sounds as if there should be DTC codes. Have you checked? Do you have a CEL?

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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 9:07 pm 
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I see two possibilities.

1. The OD clutch is burnt up and not engaging. Which would require a complete transmission rebuild or replacement.

2. The solenoid for the OD clutch has failed, not allowing the clutch to be engaged.
This is quite a bit easier to deal with because it would only require replacement of the solenoid pack.

I recommend consulting a local transmission repair shop for proper diagnosis.

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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 9:43 pm 
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flash7210 wrote:
I recommend consulting a local transmission repair shop for proper diagnosis.

X2, some things are simply better left to the experts! :roll:

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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 9:49 pm 
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GordnadoCRD wrote:
It sounds as if there should be DTC codes. Have you checked? Do you have a CEL?

What are DTC codes? What is a CEL?


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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 9:53 pm 
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But why is that it happens sometimes only? It is not happening all the time. I can go for days without this problem. I think it is happening after more than an hour driving.


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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 10:14 pm 
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CEL = check engine light

DTC = diagnostic trouble codes

If the CEL is on, you use a code scanner to read the DTCs.

If the problem is intermittent, then it’s probably not a burnt up clutch.
More likely an electrical problem. Possibly the solenoid pack.

Again, you will need someone who can provide some hands on diagnostics.
Or just replace the solenoid pack (and fluid and filters) and hope that fixes it.

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Bought my '05 CRD on June 2nd '07, used with 29,000 miles.
intake elbow and EGR delete. 5 volt bosch glow plugs
Yeti stage 2 ECU tune. Straight pipe exhaust. DIY intercooler hoses
Provent and modified factory 180F thermostat
Replaced cylinder head (cracked) at 160,000 miles + ARP studs
2.5 inch lift, JBA upper arms, 235-85-16 tires.
Still love it.


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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 10:56 pm 
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flash7210 wrote:
CEL = check engine light

DTC = diagnostic trouble codes

If the CEL is on, you use a code scanner to read the DTCs.

If the problem is intermittent, then it’s probably not a burnt up clutch.
More likely an electrical problem. Possibly the solenoid pack.

Again, you will need someone who can provide some hands on diagnostics.
Or just replace the solenoid pack (and fluid and filters) and hope that fixes it.

No Check engine light is on. Only weird thing was that the ABS light turned on while I was having this issue. That can be because 2 months ago I destroyed one ABS sensor and replaced with a new one...
Replacing the solenoid pack is not replacing the whole transmission box?


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 Post subject: Re: Automatic transmission is not switching gears
PostPosted: Wed Mar 07, 2018 10:58 pm 
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flash7210 wrote:
I see two possibilities.

1. The OD clutch is burnt up and not engaging. Which would require a complete transmission rebuild or replacement.

2. The solenoid for the OD clutch has failed, not allowing the clutch to be engaged.
This is quite a bit easier to deal with because it would only require replacement of the solenoid pack.

I recommend consulting a local transmission repair shop for proper diagnosis.

How much is to replace the whole transmission?


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