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AZTechBrian
AZTechBrian, ASE Certified Technician
Category: Transmissions
Satisfied Customers: 708
Experience:  Owner
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I changed the transmission on my car but now it does not

Customer Question

I changed the transmission on my car but now it does not seam to change gears what could be the problem
Submitted: 11 months ago.
Category: Transmissions
Expert:  AZTechBrian replied 11 months ago.

Hello. Was the replacement transmission a known good transmission? Did you ever experience this transmission shift as it should?

Customer: replied 11 months ago.
it was working good on the other car
Expert:  AZTechBrian replied 11 months ago.

Ok. And you personally verified this? I assume you have checked and the fluid level is correct?

Customer: replied 11 months ago.
The reverse gear works great it is just that it doesn't select when driving
Expert:  AZTechBrian replied 11 months ago.

Does it start out in first gear fine, but neglect to shift into second?

Customer: replied 11 months ago.
thats right
Customer: replied 11 months ago.
I dont have the tools to check the fluid level but i put in 6 quarts
Expert:  AZTechBrian replied 11 months ago.

Is it the 5 speed or 4 speed transmission?

Customer: replied 11 months ago.
4 speed
Expert:  AZTechBrian replied 11 months ago.

OK, and you added 6 quarts on top of what was already in the system?

Expert:  AZTechBrian replied 11 months ago.

unless you replaced the torque converter, that's about the total capacity for that transmission. With a drain and fill they are only calling for the addition of 3 quarts to start with, and checking it from there, but there is an overflow pipe, so.. I am going to opt out in case somebody else has a better idea and can guide you in the right direction.

Customer: replied 11 months ago.
Is there a code that i should use to reset the computer ?
Expert:  AZTechBrian replied 11 months ago.

if I were you, for piece of mind, I would perform a drain and fill with 3 quarts to make sure that you don't have too much fluid in the transmission. I will provide the instructions for that in just a minute. Also, Have you checked the computer for DTCs? If your transmission wont shift, there are probably codes stored.

Expert:  AZTechBrian replied 11 months ago.

heres the info for the transmission service.

https://www.dropbox.com/s/sp2u33p06bcf49o/atfr.pdf?dl=0

Try to pay attention to see if more than roughly 3 quarts comes out when you drain it.

Customer: replied 11 months ago.
I will drain it tomorrow
Expert:  AZTechBrian replied 11 months ago.

OK. Try if possible to get the codes too. I'm sure something is stored in there.

Customer: replied 11 months ago.
I got the codes po327 po730 and another po730
Customer: replied 11 months ago.
i also realize it is slow to climb hills i tried to select 1 and the engine cut off when i put it back in drive it continued
Expert:  AZTechBrian replied 11 months ago.

Ok. P0327 is a knock sensor code. Loosen the knock sensor and torque it to 20Nm. That has been known to remedy that code in some instances.

P0730 is a generic transmission code indicating incorrect gear ratio. This code can be caused by low trans fluid, clogged filter, wiring issues, internal damage, etc, but is usually caused by internal damage. I would definitely follow the drain and fill procedure I provided earlier to make sure that isn't an issue.

Expert:  AZTechBrian replied 11 months ago.

I'm sorry for the delay BTW... I didn't have a change to get on until just now.

Expert:  AZTechBrian replied 11 months ago.

How did it go? Did you correct the fluid level?

Customer: replied 11 months ago.
I did but still the same problem
Expert:  AZTechBrian replied 11 months ago.

OK. I have a feeling that your transmission has an suffered internal failure. Does the transmission just stay stuck in first gear? Or does it seem like it goes into neutral?

Customer: replied 11 months ago.
It goes on to about 40 mph then selects to second
Expert:  AZTechBrian replied 11 months ago.

so, it is going through all the gears, but it just delays between first and second?

Expert:  AZTechBrian replied 11 months ago.

HI Brian. did you have further questions?