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Old 12-17-2019, 07:24 PM   #1
Kerryk
 
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Default D21 auto Transmission help

Hello everyone. I have a 94 4x4 with an auto trans that will only go in 1st and reverse. Does anyone know what might cause this?
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Old 12-17-2019, 08:38 PM   #2
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what does the trans fluid look like? you could have bad shift solenoid(s) linkage issues... can you give us more info....
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Old 12-17-2019, 11:06 PM   #3
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Thank you for your reply. I will have to look when I get home I literally just bought the truck yesterday knowing there was a transmission issue and of course praying for an easy fix. First year pool strong no slippage and the four-wheel-drive works great just no second third or fourth.
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Old 12-17-2019, 11:09 PM   #4
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Sorry that is supposed to say First gear pulls strong. I was using talk to text. Guaranteed to make you sound ignorant from time to time if you don’t proofread
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Old 12-17-2019, 11:09 PM   #5
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Lets hope it is only linkage
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Old 12-17-2019, 11:49 PM   #6
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Does the speedometer work?
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Old 12-18-2019, 12:10 AM   #7
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Transmission fluid is clean and does not smell burnt
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Old 12-18-2019, 12:17 AM   #8
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Yes the speedometer works
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Old 12-19-2019, 09:32 AM   #9
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Have you checked the tranny fluid level in Park or Neutral with the engine running? Is is up to proper level?

I am not an expert on these auto-trans for Nissan trucks. I have not owned one. But I can provide some hints based on limited information. A lot of stuff on these trannies is electrically-actuated. One or more of these items could be out. Or your linkage could be funny. Or you might need a new tranny filter. The interior design on these units is pretty damn good. They don't blow the clutches or steels easily.

I checked out the factory service manual. There is a section for diagnosing problems, but it's many steps, much checking. Road test under different settings. Set the brake and try THIS...or do something else and then do THAT. Even I couldn't understand it all.

Your best bet is to find a good tranny shop who can diagnose the problem for you. And that isn't just picking a name from Google search. The shops that have people who can diagnose this stuff effectively is a short list. Search. Get recommendations. Look for shops where someone else with a similar truck has had success. They are out there, but you have to find them. So many mechanics today just don't know how to figure out a problem in anything without a computer hookup to the vehicle. Or anything made before 2000.

I'm guessing a solenoid out or funny linkage. Welcome to a classic Nissan truck. Repairs to them often take an old school approach, but the good part is that when you finally work out the bugs, you will have something really classic, really good.

When your truck rolled off the assembly line in 1994, it cost (a guess) around $13,000. Back in those days, you could buy some really nice cars and trucks for that kind of money. It is worth it to restore them to daily drivers.

How about telling us some more about your truck. Mileage, options, stuff like that. Does it start normally in Park...sure, okay...but what happens when you put it in Drive...exactly.
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Old 12-19-2019, 11:23 PM   #10
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The truck is a 1994 ext cab 4x4 automatic with 256k miles. It starts good and when you put it in drive it drives fine with no slipping but it just doesn’t shift . And reverse is the same way
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