5th gear went Pop

[mudnut]

Try talking to this mob http://360gearboxesdiffs.com.au/mods-2/ about the mods they can do.

[mudski]

Wonder if Marks Adaptors do a c/o box with their extra ratio overdrive gear they sell. That would be handy. My ZD box is nees new synchros and was kinda thinking to get a TD box with this new gear in it and maybe reduction gears. When I get my money tree growing of course. Haha!

Sent from my GT-N7105 using Tapatalk

[dom14]

The original gear box in mine (FS5R30A) only did 270,000km and died while towing my light camper trailer up and over Mt Cole. The vehicle has only done 310,000 km and I am up for another gearbox when I can get the money.

They can't be that bad, do they?
I like to believe the reason gearbox failed on that mileage might be 'cos the previous owner has been bashing and thrashing it around.
For example, mine doesn't look that good in terms of other parts of the vehicle, like the engine, suspension, diffs, etc 'cos all of them gave me lot of crap trouble, but not the transmission. I doubt the tranny has already been through any work on it.

You can source RB30 boxes cheaply, but might be necessary to take a chance with them, which is something you probably don't wanna do now 'cos you've already got burnt by a used one.

[dom14]

Wonder if Marks Adaptors do a c/o box with their extra ratio overdrive gear they sell. That would be handy. My ZD box is nees new synchros and was kinda thinking to get a TD box with this new gear in it and maybe reduction gears. When I get my money tree growing of course. Haha!

Sent from my GT-N7105 using Tapatalk

I found out the bad & sad way those money trees need lot of synthetic fertilizer and a bit of gambling to get them to grow quickly or die quickly.
Try the nearest casino. Since you're a businessman, you already know these stuff.

[mudnut]

They can't be that bad, do they?
I like to believe the reason gearbox failed on that mileage might be 'cos the previous owner has been bashing and thrashing it around.
For example, mine doesn't look that good in terms of other parts of the vehicle, like the engine, suspension, diffs, etc 'cos all of them gave me lot of crap trouble, but not the transmission. I doubt the tranny has already been through any work on it.

You can source RB30 boxes cheaply, but might be necessary to take a chance with them, which is something you probably don't wanna do now 'cos you've already got burnt by a used one.

Some have posted that they absolutely thrash their RB30s and they're getting high mileage out of the gear train. The problem is that the gearbox internals are basically designed for road vehicles.

There was one wrecker ( can't remember their name) in the Eastern burbs that was splitting a number of boxes and making one good unit out of them. He was giving a 3 month warranty, but was asking top dollar.

[dom14]

Some have posted that they absolutely thrash their RB30s and they're getting high mileage out of the gear train. The problem is that the gearbox internals are basically designed for road vehicles.

There was one wrecker ( can't remember their name) in the Eastern burbs that was splitting a number of boxes and making one good unit out of them. He was giving a 3 month warranty, but was asking top dollar.

I wouldn't waste money on that. It's better to spend that money on those professional tranny builders.
They put new synchros, bearings and gears(if necessary) and fix them properly for long term. Besides you get
a decent warranty as well. I guess putting new gears can jack up the rebuilding price tag a bit 'cos replacement gears are not cheap.
But, synchros, bearings aren't that expensive. The rebuild kit(retail) is around $400-500 mark(I don't think the kit comes with any gears by default on that price).
I bet the professional rebuilders source the parts lot cheaper than that.

[dom14]

Some have posted that they absolutely thrash their RB30s and they're getting high mileage out of the gear train. The problem is that the gearbox internals are basically designed for road vehicles.

My rear diff developed pinion bearing wear issue out of blue, back in 2014. I was told I was just unlucky, but I reckon there are
better explanations out there. Perhaps the suspension lift job that was done by the previous owner might have caused it.

Yours might have been a factory fault, but not likely.

I've seen turbo and NA RB30 Patrols getting thrashed off road, but I think they do fail eventually.

What we need is an 'adaptor' to fit TB42 box to an RB30 engine.

[mudnut]

My rear diff developed pinion bearing wear issue out of blue, back in 2014. I was told I was just unlucky, but I reckon there are
better explanations out there. Perhaps the suspension lift job that was done by the previous owner might have caused it.

Yours might have been a factory fault, but not likely.

I've seen turbo and NA RB30 Patrols getting thrashed off road, but I think they do fail eventually.

What we need is an 'adaptor' to fit TB42 box to an RB30 engine.

I did ask about that quite a while ago, and was told that Marks do a bell housing adaptor for the TB42 auto transmission. I was also advised (by Nissannewbie) the FS5R50A would sap too much energy from the RB30 to be viable. Although a turboed 30 would handle it.

[dom14]

I did ask about that quite a while ago, and was told that Marks do a bell housing adaptor for the TB42 auto transmission. I was also advised (by Nissannewbie) the FS5R50A would sap too much energy from the RB30 to be viable. Although a turboed 30 would handle it.

Ideally, any energy loss that is caused by a mismatch of torque conversion should able to be corrected by employing the correct diff ratio. And hopefully that should fix any energy loss. I like to think the slightly bigger box ideally shouldn't cause any significant loss of energy, 'cos after all the interior components are near identical, but just slightly bigger. A heavy duty clutch may be necessary to match a high revving RB30 with the TB42 gearbox.

There is a thread somewhere on how to fit an auto tranny onto a GQ RB30.

[themage21]

In 2016, I blew mine driving along the freeway home, 110kph, no towing and minimal on-board load. Zero warning, just went bang.

Trying to source a repairer, there only appear to be 2-3 places in Sydney that will touch these boxes (I suspect due to weight and pain in the a*** value in getting them out) and that get recommendations for the repair from other people.

$600 in labour to remove/install.
$2300 approx for bearings/seals/new shaft & gear (and labour to do the work). Uprated gear (so better than the proper replacement, probably from Marks) was going to cost another $1200 on top of that. I got two of my synchros done, should've done the lot, my first now pops out occasionally when crawling down hills, but for now I've just taken to being a bit kinder to it.
$100 to get it towed half way across Sydney.

I thought about dropping in a wrecker box, but the question would always be over my head as to when that one was going to blow as well. The zero warning and then possibility of having to drive 100's of k's with 4 gears and the sound of metal trashing everything inside the box that was still ok dissuaded me from the idea.

Also came with I think a 20k/1 year warranty. Either way, better than if I'd stuffed around with it.