Nissan4x4

Just was wondering what type of fluid everyone was running in their manual transmissions? Synthetic or regular?

Thanks

Yontrop

If it's the same manual trans in the '96 and '97, it'd be Hypoid 75w90.

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ASE-certified technician by day, metal musician and computer nerd by night, and avid Nissan HB lover

1997 D21 XE KA24E 2WD 5-spd - 190,000mi

kkspeed

In 1994, I bought a 1990 Hardbody (4 cyl / 2wd) with 67,000 miles. There was a slight synchro grind in the tranny while shifting into second gear. I put in Mobil 1 Synthetic gearoil (75 - 90W) and the problem disappeared!
When I junked the truck 10 years later with 251,000+ miles, the tranny still shifted perfectly!

88pathoffroad

GL-4 75W-90 ONLY. Don't use GL-5 gear oil. Synthetic is better than regular. Some people use GL-4 Synchromesh.

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Owner of NPORA, mod for Nissan-Infiniti Forums, NissanForums.com, NissanHelp.com, AllNissans.com and VGPowered Forums
'88 Pathfinder: 6" of lift, 33x13.50 Swamper LTB's, Rancho 9000's, L&P Stage 3 steering system, K&N, Pacesetter headers and 2.5" exhaust, Lock-Right locker, 110A alty and electric fan swap, dual batteries, 700W+ worth of PIAAs, etc.

Nissan4x4

Which oil is best between the mobile one synthetic and the redline Mt-90?

veesix

Mobil does not offer a synthetic G4. Pennzoil does but good luck finding some

I called Pennzoil, and they said that the best bet was to call Wal-Mart (Pennzoils biggest customer).

I made maybe 5 calls to The automotive dept. manager and so far NADA.

If enough of us call maybe Wally will order a few cases

Bror Jace

Looking for a GL-4 90 weight (80W-90, 75W-90, etc ...) gear oil for a synchromesh tranny? Best to use either Red Line MT-90 or Specialty Formulations MTL-R:

http://www.specialtyformulations.com...es/Page675.htm

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--- Bror Jace

Nissan4x4

Keep seeing others that have used mobil one. Anyone else used this with good luck. It was recommended on another nissan site but like everyones saying its GL-5.

(kkspeed) did your syncro problem go away as soon as fluid was changed or after few miles of running mobil one? I have same problem with my truck its a 95 with 134k and a slight 4th gear synchro grind.

Bror Jace

" ... it was recommended on another Nissan site but like everyones saying it's GL-5."

GL-5 oils are not as corrosive (as a class) as they once were ... but there's still some risk of synchro damage.

Since you don't have to use a lot or change this stuff often, it's best to just bite the bullet and buy the best oil you can, even if you have to go mail order.

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--- Bror Jace

kkspeed

As I recall, the problem went away as soon as I changed the fluid.

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2000 Nissan Frontier XE King Cab, 2wd , 4 cyl, automatic