Hi I have Honda CR-V 1998, and the problem is that car normally change transmission from 1to 3th D, but from 3D to 4D change very hard, or often even do not change. I step on the gas even till under 40-60 mph/(3000-4500) revolutions per minute but again no result. So I'm confused and don't know where to search issue, because from 1-3 transmission is very normal. Honda diagnostics do not show anything wrong and no error light are blinks. Cars fuel expanse are also high now and approximately equal to 10 liter per 40mile, I assume this is because car do not use 4th transmittance.
Is there any idea there is the issue, what should I do to resolve that, or what should I do to diagnose problem.
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With the little information I was given there is two possible answers,The first is not an easy fix or a cheap one and that is a slipping band in the transmission and the second is the speed sensor on the transmission eighther one would require having it looked at by a transmission shop.
The 1st thing to do is have a test run on the transmission control module to see if any trouble codes are present, next have you ever serviced the transmission, fluid and filter change, should be done at 60,000 miles, on occasion this can cure problems like yours.
I'm sure this depends on the year and model. For example a 2002 Honda CR-V should have the transmission fluid changed at 120,000 miles under normal use but under severe conditions it should be done at 60,000 miles.
Anytime the fluid looks brown or murky rather than red it should be changed.
To change the fluid you must drain it and refill it a total of 4 times, driving a short distance between changes. This is because the oil that comes out of the drain plug is less than half of what is actually in the transmission. You can have Jiffylube do it for about $75 or a Honda dealer for twice that. To do it yourself by draining and refilling 4 times may cost about $50 for the fluid. It is strongly recommended that youj use only Honda ATF purchased from the dealer. Use Dexron only in an emergency until you can get the Honda fluid.
if your trans fluid is full it may be an internal problem in the gearbox even in the converter its hard to diagnose without seeing the car but i can sure try to help if you can add any other noises or symptoms i will see if i can help you pinpoint the problem