1991 Nissan Pathfinder won't go over 20 mph even if you rev the car/RPMs.

IZYCNRENEE

MEMBER
1991 NISSAN PATHFINDER
6 CYL
4WD
AUTOMATIC

Hi. Ok, I asked about the cause of our 1991 Nissan Pathfinder being broke down. Right now the car will start and drive but no matter how much you push the accelorator the rpms go up but the car will not go over 20 mph. I got the answer that it's prob in the transmission and to check the tran filter and change if clogged. Then we were told that if the tran filter is clogged it will probably be with tran debris (not good). My hubby is going to drop the pan and check the filter in the morning. But I was wondering if we could have a diagnostic test done to see if there are any codes. Also-will a diagnostic test from a 1991 Nissan Pathfinder tell us if the transmission is bad? Or why?
Thank you! :)
-Renee

6 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

The only thing that is going to tell you what the problem with that is would be a good old transmission technician. If the trans is slipping and you have verified that the fluid id full, then chances are pretty slim it won't need a new trans.

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Tuesday, December 7th, 2010 AT 1:04 AM

IZYCNRENEE

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Thanks.

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Tuesday, December 7th, 2010 AT 1:09 AM

IZYCNRENEE

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That makes sense! So if the tran fluid is full but I can't go over like 15mph no matter how much I press the gas/rev the rpms then you think I MOST LIKELY WON'T HAVE A BAD TRANSMISSION? :)

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Tuesday, December 7th, 2010 AT 1:20 AM

WRENCHTECH

MECHANIC
20,761 POSTS

No, that's not what I said. You most likely WILL have a bad transmission.

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Tuesday, December 7th, 2010 AT 1:23 AM

IZYCNRENEE

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4 POSTS

My hubby checked it just now idled in the driveway on flat ground. He had to add at least a quart. Not sure yet. So how many quarts go in this tran? :)