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Just dusted off the old Gregory’s Y61/GU 1998-2014 manual.
Chapter 7 Part A
Manual transmissions
Model FS5R50B
TB45E, TB48DE, ZD30DDTi, TD42
SAE 75W-90 GL4
3.5 Litres
&
Model FS5R30A
RD28ETi
SAE 80W-90 GL4
5.1 Litres
Chapter 7 Part B
Automatic transmission
Model RE4R03A = Four-speed
Nissan Matic D or Dexron III
Approximately 12.0 Litres
&
Model RE5R05A = Five speed
Nissan Matic J
Approximately 11.0 Litres
Chapter 7 Part C
Transfer case
Model TX12A
Fitted to all models
Nissan Matic C or SAE 75W-90 GL4
1.9 Litres
Certainly is weird that they specify both a tranny “or” gear fluid with no other explanation throughout Part C.
John, that's interesting for sure. I would not have thought the oil properties for an ATF would be suitable for a gear loading application - obviously they are especially if you have been doing this for close to 13 yrs! Learnt something new today.
The planetary gears in the auto trans take a fair bit of loading. I'm rebuilding an RE4 auto at the moment that has done 326k kms and, although the clutches are well worn, the planetary gears look perfect.
John
2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body
A more experienced and wiser member explained it all a very long time ago. Early GQs ran gearbox oil in their Transfer cases.(Hence the listing calling for Gear Box Oil) . Mark, please check the year of publication. It was found that the shaft running through the Transfer case could cause the chain to rotate, making the front drive train turn. It was more prominent in colder weather. My '94 runs Auto Trans Fluid, but has manual hubs.
I would expect auto hubs to try and engage if the heavier gearbox oil was used.
Last edited by mudnut; 27th December 2019 at 02:05 PM.
yes . it's a viscosity thing , the friction of the free spinning gear in the TC spins the front driveshaft /diff and engages front hubs . people hear noises comeing from hubs and complains to mr nissan . mr nissan says use lower viscosity atf and viola!! no more warranty complaints . atf being a very good quality oil does the job just fine , just a bit more expencive
Well this is going to be a bit of an experiment: I found out today the mechanic who changed out the gearbox and transfer case used gear oil in the transfer case.
I drained and filled the case with the recommended ATF. It will be interesting to see if the noises will die down, the gear shift when cold is easier or the oil seals will start leaking.
Well this is going to be a bit of an experiment: I found out today the mechanic who changed out the gearbox and transfer case used gear oil in the transfer case.
I drained and filled the case with the recommended ATF. It will be interesting to see if the noises will die down, the gear shift when cold is easier or the oil seals will start leaking.
Do you run auto hubs on your GQ Craig? Cold gear shifting won't change one bit when switching transfer case oils. Or am I reading this wrong?