Transmission Troubleshooting
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Automatic Transmission Trouble Shooting Basics
1) First thing to do, no matter the issue, is to check the transmission fluid
The transmission is slipping: odds are the fluid level is low and topping the fluid level off will take care of the immediate issue(you'll still want to find out what happened to the missing fluid.
The transmission fluid is Dark and smells burnt: At this point if the transmission is shifting ok, a fluid and filter change is in order. If the transmission is causing you an issue and the level is full but still burnt looking you are looking at needing a rebuild. The dark color comes from the worn clutches inside the transmission. The clutch material is similar to that of brake pads and when they wear the leave dust similar to brake dust collecting on your wheels. |
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Transmission won't shift, No reverse, Stuck in Gear, No Overdrive: |
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these transmission problems can be caused by severe internal damage, a failed shift solenoid, failed sensor or a transmission computer module failure. Sometimes a simple software update is all that's needed to cure the shifting issues, fortunately the the check engine light comes on when there is an issue giving you a P0700 code that tells the technician that there is a transmission code present. At this point the technician can scan the transmission codes that will help diagnose the issue.
No Reverse or No Overdrive: In most cases a solenoid has failed and needs to be replaced. The solenoids can be accessed by removing the transmission pan and filter. Usually a couple of bolts and one electrical plug and you can remove the solenoid...and no, there won't be a bunch of springs jumping out at you.
Internal Transmission Damage: In most cases when the transmission pan is removed there will be quite a bit of small metal fragments apparent in the bottom of the pan and trapped to the magnet stuck tot the bottom of the pan. You are in for a rebuild and some hard parts.
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Get an online repair manual for more in depth diagnostic and trouble shooting procedures for your exact vehicle. 1983-current year Domestic & Import Model Coverage
- Clear, Concise Illustrations & Diagrams
- Time-saving TSBs, Recalls, & Technical Tips
- Detailed, Accurate Repair Articles
- Model-Specific Maintenance Schedules Electronic Component Locator for all Models
- Exploded View Illustrations
- Troubleshooting, Reset Check Engine Light
- Electrical Component Locations
- Scheduled Maintenance Tables
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Complete wiring diagrams included with Mitchell1 |
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More Coverage Than Anybody Else |
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Mitchell1, also called eAutoRepair, is one of the best sources for online automotive repair manuals. And is a better Online Manual than Chilton , in my personal opinion. You will receive access to thousands of pages of comprehensive technical information, complete wire schematics, drive belt routing, diagnostic trouble codes and much more.
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Transmission Pan Removed |
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A great way to get a top quality repair manual for your car is to signup with an online repair manual provider, such as Mitchell1.
Purchase the Mitchell1 Online Repair Manual
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If you find yourself looking a needing a new or rebuilt transmission, just remember that it is only as good as the warranty that it comes with. I have found most shops that rebuild your transmission just replace the one bad spring or part and the rest of it is just as old and wore out as it was when your problem first occurred. And their warranty only covers that specific spring or part. So if you have and issue 3 weeks later, yup you guessed it... time to pay again. At my shop I recommend Jasper as they come with a nationwide 3 year/ 100,000 mile parts AND labor warranty. They do cost more, but you can't beat the warranty. |
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