Landcruiser Gear box

Hi Brian

Not sure if this is the same but I put 80w/90 gear box oil in my landcruiser ute and it was difficult to change gears when cold and I would often miss a gear in the mornings. I checked on toyota and the correct grade of oil is 75w/85 so I changed to that oil and it is much better.

Cheers

Serendipity

It's a while since I had my 75 series, but could it be the clutch adjustment? 1st, second and reverse don't have the same synchro as 3rd and 4th and the clutch might be dragging and not totally disengaged.

Greg.

G day Brian T It is most likely to be the clutch hanging on, could be out of adjust or dry on the spline of the gear box in put shaft . Or if there is a bad oil leak at rear main oil seal on the motor it may have oil on the clutch plate but this more likely to cause a shudder in first or rev. Regards Macca.

Make sure the seat that the gear lever ball sits in is not starting to break up. If it is it will allow the lever to sink down into the box a little resulting in the end of the lever binding in the selectors. It was a problem with the 60 series back in the days when I worked on new ones and may have carried on into later models.

Hi, bearing in mind that the landcruiser mechanism is hydraulically operated there will be no manual adjustment possible. However the problem may well be either the master or slave cylinder letting fluid bypass their seals as the oil warms up and becomes slightly thinner. The hydraulic fluid may need replacement due to moisture contamination this will also affect the operation. Any or all of these things can affect the operation of the clutch. If you know where to look see if the level of the fluid has dropped in the reservoir on the master cylinder this will indicate a leak in the system somewhere. To repair any of these reasonably inexpensive. Just because you have had the vehicle serviced every 5000k's does not mean that the clutch system has been checked. Take your vehicle to a good trustworthy mechanic who can look at it for you and give an honest opinion not a dealership who will not unsurprisingly tell you that you need a new clutch. You don't say how old the vehicle is or how many k's on the clock or what type of work it has done. This info will help people diagnose the issue for you. Visit www.lcool.org and join its free, mile of great landcruiser info there.

Also remember that the box fitted behind a 1hz in cruisers is the lighter box and a known failure point, adding the turbo and towing a van would not add to its longevity.

As mentioned. The manual gearbox in the 1HZ 100 series is a lighter box. I had the same issues many years ago with my same vehicle ( aftermarket turbo, 1Hz). I ended up replacing the gearbox with a heavier one from a manual petrol V8. It bolted straight in with no changes needed. I also put in a heavier clutch. The only difference was a slightly lower final gear ratio which meant slightly higher revs at 100kph. Although i used my vehicle at the time for towing a heavy mobile w/shop so i rarely sat on 100 anyway. Peace of mind with the heavier box though. Ps, i wish i still had the ole girl!!!
Cheers,
Keepingitreal