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No reverse with two transmissions
2006 Nissan Altima

No reverse with two transmissions

(2006 Nissan Altima)
I purchased a 2006 Nissan Altima SL 3.5l 5 speed automatic. The car needed a motor. Owner stated the transmission was fine. I replaced the motor. I had no reverse. Forward gears, but no reverse. I purchased another transmission (rebuilt??) and installed it. The same condition. Forward gears but no reverse. I used the same torque converter, nuetral safety switch and fluid cooler. Everything else came with the transmission. There are no codes present with either transmision? I readjusted the shift cable, I unplugged all the connectors and tried it again. Same problem. I checked the pressure at the reverse test port (specs 60 - 80 psi at idle) and the pressure pegs my 250 psi gauge?? It also has a steady drip out of the front seal (or pump o-ring?). The transmision is not a CVT. It is model AW55-50sn (RE5F22A). I am at a loss on what to do. Is it inside the trans or could it be the TCM which is external on this car (behind the glove box)?
Thank You, Chris (retired master tech
What seems to make the problem better or worse? Its all of the time
How long have you had this problem? Just purchased the car.
Tags: no reverse, has forward gears, excessive reverse pressu, front seal leak, nissan, altima
1 answer & 2 comments
Popular Answer
on March 07, 2019

Pro quality scan tool - viewing live transmission data is priceless!
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on March 07, 2019

Since problems is present with both transmissions - I’d bet on an open circuit.

We can’t offer any other assistance here online.

Good luck!
on March 07, 2019

https://www.valvebodypros.com/assets/aw55-engagement.pdf
Automatic Transmission Diagnosis
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on March 07, 2019

Pro quality scan tool - viewing live transmission data is priceless!
Sign in to reply
on March 07, 2019

Since problems is present with both transmissions - I’d bet on an open circuit.

We can’t offer any other assistance here online.

Good luck!
on March 07, 2019

https://www.valvebodypros.com/assets/aw55-engagement.pdf

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