transmission
transmission
I just bought my 2005 Pathfinder. It has 105k miles on it. I think I love it, but I hear a whinning as I take off from a dead stop and a low roar around 40 mph. It seems the 40 mph is a shift zone. I don't know if the fluid has been changed. Any ideas?
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Towncivilian
- Posts: 4868
- Joined: Sun May 23, 2010 10:21 am
- Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T - Location: Florida, USA
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Re: transmission
Change the fluid. The transmission pan has a drain plug, probably 19mm. Obtain a new drain plug crush washer from your dealer. The torque spec of the drain plug is 25 ft/lbs.
Valvoline Maxlife ATF is formulated with synthetic basestocks and is a very good fluid for the price. It works in almost anything, and it meets the Nissan Matic J spec.
I don't know the drain & fill capacity of the R51's transmission, so obtain a measurable container and put in exactly what was drained, then check the level.
I'd suggest doing a few drain & fills several days within each other. If you do this, use the new crush washer for the final drain & fill only; the crush washer currently on the drain plug will be fine for a few days (but obviously check for leaks just in case).
Read page MA-23 of the factory service manual to see more information about checking & changing the fluid.
You may also want to change the rear differential fluid. See MA-27. You'll need 1.5 quarts of 75W-90 GL-5 fluid - 2 quarts of Mobil 1 75W-90 synthetic gear oil should be easily obtained at your local parts store, and is reasonably priced for a very good fluid. You'll need new gaskets (probably crush washers, but they aren't the same ones as the oil/trans drain plug washers), so get those at the dealer too if you decide to do this. The plugs are probably 1/2" drive. If they're anything like the WD21/R50 diffs, it may be difficult to remove the plugs. If so, try using some PB Blaster or other penetrating oil and try removing the plugs after a long drive; heat should help to loosen the plugs.
Since you just bought the vehicle, you should change the in-cabin microfilter (see MA-21), power steering fluid (use a turkey baster or suction gun to siphon fluid out of the reservoir; Mobil 1 synthetic ATF or Valvoline Maxlife is a good choice here - do this several times a few days apart as well), get a brake fluid flush, and change the coolant (drain & fill of radiator with OEM coolant + distilled water will suffice). Also, at 105k, the spark plugs are scheduled to be replaced. Unless, of course, you have records that indicate these items have already been serviced.
I don't know how mechanically inclined you are, so perhaps consult the dealer if you're unsure about doing any of this service yourself.
Welcome to NICO!
Valvoline Maxlife ATF is formulated with synthetic basestocks and is a very good fluid for the price. It works in almost anything, and it meets the Nissan Matic J spec.
I don't know the drain & fill capacity of the R51's transmission, so obtain a measurable container and put in exactly what was drained, then check the level.
I'd suggest doing a few drain & fills several days within each other. If you do this, use the new crush washer for the final drain & fill only; the crush washer currently on the drain plug will be fine for a few days (but obviously check for leaks just in case).
Read page MA-23 of the factory service manual to see more information about checking & changing the fluid.
You may also want to change the rear differential fluid. See MA-27. You'll need 1.5 quarts of 75W-90 GL-5 fluid - 2 quarts of Mobil 1 75W-90 synthetic gear oil should be easily obtained at your local parts store, and is reasonably priced for a very good fluid. You'll need new gaskets (probably crush washers, but they aren't the same ones as the oil/trans drain plug washers), so get those at the dealer too if you decide to do this. The plugs are probably 1/2" drive. If they're anything like the WD21/R50 diffs, it may be difficult to remove the plugs. If so, try using some PB Blaster or other penetrating oil and try removing the plugs after a long drive; heat should help to loosen the plugs.
Since you just bought the vehicle, you should change the in-cabin microfilter (see MA-21), power steering fluid (use a turkey baster or suction gun to siphon fluid out of the reservoir; Mobil 1 synthetic ATF or Valvoline Maxlife is a good choice here - do this several times a few days apart as well), get a brake fluid flush, and change the coolant (drain & fill of radiator with OEM coolant + distilled water will suffice). Also, at 105k, the spark plugs are scheduled to be replaced. Unless, of course, you have records that indicate these items have already been serviced.
I don't know how mechanically inclined you are, so perhaps consult the dealer if you're unsure about doing any of this service yourself.
Welcome to NICO!