06 Pathfinder Transmission swap, still shuddering

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06 Pathfinder Transmission swap, still shuddering

Postby Aft3rburn » Mon May 04, 2020 3:06 pm

I just bought a used 06 nissan Pathfinder (love it!) and it had the
dreaded shudder from the initial test drive and after a transmission replacement.

I drove all this weekend (after finally getting it back from my dealer on this past Friday) in 2WD mode with just a hiccup here and there..

usually it would shudder around 55-65 mph when lightly accelerating.. Not sure what that's about.. Also shudders at slower speeds when I set the selector to Auto.

anyone have suggestions? I'm having them check the fluids today

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Re: 06 Pathfinder Transmission swap, still shuddering

Postby palmerwmd » Sat Jun 06, 2020 1:27 am

I am sorry I caught this post so late... :(

Did they replace the radiator when they replaced the transmission?

The only thing (within reason) that generally kills these transmissions is a failing radiator mixing coolant into the ATF via the heat exchanger built into the radiator.
Your model year is infamous for it.

Putting in a new transmission without replacing the radiator simply will destroy the new transmission.
If you paid a shop to replace the tranny they must have the professional knowledge to replace the raditor or at the very least bypass the ATF loop from the radiator.

Any aftermarket radiator as well as the newer OEMs radiators will not have this issue.
It was specific for the radiators put into the 05-10 model years with the 05+06 being the most vulnerable.

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Re: 06 Pathfinder Transmission swap, still shuddering

Postby smj999smj » Sat Jun 06, 2020 5:58 pm

You might have simply gotten a bad transmission. What kind of transmission was it...used, Nissan reman or aftermarket reman? Is it a Nissan dealer that did the work? Palmerwind makes a good point in regards to the radiator, although in some cases they might use Kooler Kleaner to backflush the trans cooler in the radiator if the radiator had already been replaced or wasn't the cause of the initial failure. A bad U-joint could cause vibration, but I would hope they would have noticed this when the replaced the transmission. Let us know how you make out!

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