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Discussion Starter · #1 ·
Title states my issue. The belt still slips after replacing my transmission from a scrapyard. The donor was a 2009 Altima driven in a week before I got the transmission with 180k on the ODO, other than that I have no info on the donor. TC came with the new transmission, so that's also been replaced. I only swpaped the ROMs on the valvebodies, so I still have my old ROM in the new transmission.

I believe my original belt slip before the replacement came from a dent in my oil pan causing oil starvation. Surprisingly no leaks, though. I replaced CVT fluid with fresh fluid also. Currently slips in the exact same way it did before, just having extreme trouble putting power down to the wheels past 2k RPM, or going up hills, accelerating, etc. However, it doesn't throw any sort of codes. Very lost as to what my issue might be at this point. I know I can see codes since I read one caused by the KAM being empty after hooking up the battery
 

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Title states my issue. The belt still slips after replacing my transmission from a scrapyard. The donor was a 2009 Altima driven in a week before I got the transmission with 180k on the ODO, other than that I have no info on the donor. TC came with the new transmission, so that's also been replaced. I only swpaped the ROMs on the valvebodies, so I still have my old ROM in the new transmission.
The ROM data is principally for the solenoid characteristics of the VB, so swapping it out was a mistake. The best way to swap used CVT's is wholesale, CVT with the VB and ROM plus the TCM, that way all the data remains on the same page and no initialization is needed. If you still have the donor ROM, reinstall it and see if your problem goes away. You don't say whether you performed a ROM initialization, if not that's good, just put the donor ROM back in. If you did reinitialize, do it again to restore the donor ROM data.
 

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Discussion Starter · #3 ·
The ROM data is principally for the solenoid characteristics of the VB, so swapping it out was a mistake. The best way to swap used CVT's is wholesale, CVT with the VB and ROM plus the TCM, that way all the data remains on the same page and no initialization is needed. If you still have the donor ROM, reinstall it and see if your problem goes away. You don't say whether you performed a ROM initialization, if not that's good, just put the donor ROM back in. If you did reinitialize, do it again to restore the donor ROM data.
Thanks! I'll give that a shot. I only ever took it for a short test ride. And no, I just put my old ROM into the donor tranny, so definitely gonna do what you said.
 
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