Factory B120 Service Manual extract.

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Having never seen a BW wheel bearing set up its a little hard to understand from the description given the exact bearing set up used, however a single row tapered bearing can only support a thrust load in one direction as opposed to a double row tapered, a pair of single row tapered bearings installed opposing each other or ball which can be thrust loaded bi-directionally. This means that for a single row tapered bearing to be used singlely (without a second single row bearing installed in opposite direction) in a wheel bearing application there must be a mechanism to support thrust load in an opposite direction to which the single row tapered bearing can supqort, ie. a thrust block which slides over the diff pinion pin in the center of the diff which the machined end of the axle butts up against and prevents inward thrust movement of axle. Out ward thrust force is supported by outer race of single row tapered bearing which is held by bearing retainer/brake backing plate, that bolts onto end of axle housing. End float and preload are adjusted by shimming in general. Hope this helps..

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It's worked for me, 2x1985 A12's in 1200 utes. I bought one with 162000kms on clock now done 547000km's still has oil pressure in spec with standard pump at idle, uses no more than 500ml of oil between 5000km services. Other was bought with 365000kms and has now done 480000kms with virtually identical results. Both had impecable service history's prior to my purchase...and after. Neither show any signs of dying yet. Up until recently the 547000km one used to drive me 220km a day to work and back, most of which was highway running at speed limit including some 110km/hr zones. Driveline of this ute consists of FS5W60L transmission and 3.7:1 H165B final drive. Vibration can be cause of oil leaks but certainly I would say cork/rubber 4 piece gasket designs are well past thier prime, (sump). In my experience this is the major source of oil leaks in A series motors. Contamination entering shaft seals and oxidisation leading to hardening is the major cause of shaft seal leaks.

I think the answer to that question is easy, take one factory stock standard A12, run it in properly, change oil and filter every 5000km or better earlier,use a wide vicosity oil that is viscous at high temp, keep it tuned properly, don't thrash it from cold and you will easily get over 500,000km out of it, not to mention 6L/100km economy in a 1200. Things like playing with gear ratio's to achieve cruise revs round 3000rpm at 100km/hr can also help. You will have to replace seals more than likely to achieve 500, 000km but really depends on how many km you do over what time period. Lot of seals leak due to age not km on engine.

I'd be interested in an A15E(EFI) and FS5W60A gearbox depending on price and condition, subject to more info such as what model these are removed from, are these Nissan factory EFI or aftermarket(only interested if these are the factory A15E motors), do they come with loom and computer whats the country of origin. I'd also want to pick up in person. If this is for real i'm keen.

In the USA 3.7 and 3.545 are available for H150 however in Australia it mite prove difficult to source. H145 never got made any taller than 3.9 though.

Cameron Datto is right, there is a HUGE amount of different H190 combinations available!! There is 3 different offset diff cases/crownwheel offsets, 2 different offset carriers, 2 different pinion bearing sizes, 2 different pinion input spline variations, 4 different companion flanges, 3 different axle splines-23,27,29, 3 different CW bolt sizes-M12,M10,3/8 imperial, 4 and 2 pinion LSD versions, 90 and 80mm OD friction discs, ramp angles of 45 and 55 degrees, pinion pins set up for tapered bearings and ball bearings, alloy and cast iron carriers, a huge range of ratios from 3.364-5.8?? H190AL H190ML and H190A I think i've covered it all. Majority of this stuff is VERY RARE, hard to combine parts, and costly when it does come up forsale, but can be made into a seriously good final drive assembly for a high power output Datsun 1200 with the right combo of parts!!

How come the stainless steel strip sits further forward than on a steel bonnet? Only thing i don't like about these. Will this be fixed in future bonnets?