madkiwi Posted October 1, 2004 Share Posted October 1, 2004 (edited) Everyone who has a 1986.5 to 1995 4wd Truck or 1987-1995 4wd Pathfinder should be aware that the FS5R30A manual transmission up until 1995 does not provide adequate lubrication to the main and counter drive gears.If you are experiencing transmission whine in every gear except for 4th, you have a problem. You should park your truck now and have the transmission rebuilt, the alternative is that the transmission will eventually grenade, and a $500 rebuild quickly becomes a $3000 replacement.The tsb's show a diagram with the "fixed" transmission case, the only difference being that the fill hole was moved up 0.97 inches! That increased the oil capacity by 1.5 liters from 3.6l to 5.1lHere are the TSBs, I'll leave them up until someone sues me.TSB97-009 *Link Broken*TSB97-009AIf you have one of the covered transmissions, but you don't have the symptoms, you should still add the extra 1.5 liters of gear oil to your tranny. I decided the simplest way was to go in through the top, through the gear shifter. (Some people have tried parking on a slope so the fill hole is higher, others have tried squeezing in the extra with a bottle then quickly getting the plug in before it drains out. )How to add gear oil through the shifter holePull up the carpet from the passenger side to free the gear shift, and remove the shifter boot.Cut off the zip-tie holding the gearshift dustboot, and pull it up from the shifter assembly. You will then see a snap-ring underneath, remove it (you do have snap-ring pliers, right?) and then remove the gearshift lever. Pour 1.5 liters (1.6 US quarts) of new gear oil into the transmission.Replace shifter, snap-ring, dustboot, shifter boot and carpet. You are done!Note, shifter should be in neutral, and be careful when removing and inserting it as there is a plastic swivel thing on the end. (It only goes back in correctly one way, so if you are not sure it's right, make sure) You need a long replacement zip-tie for the dustboot, I think an 8" works.Final note, do not use any gear oil rated GL-5 in the Nissan manual transmission. It says in our manual to use GL-4, and there is a difference. GL-5 oils have additives that destroy the soft bronze synchros in our transmissions. I use Red Line MT90, and it works very well.madkiwi Edited October 26, 2014 by RedPath88 Updated Links 1 1 Link to comment Share on other sites More sharing options...
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