I took my gearbox to driveline services at paget. A cranky dude, about 40-45 years old did mine, and he did a perfect job. Was pretty cool to talk to also. Showed me a few thing about the box. He was just cranky in general because he was flat out. and no one was able to help him.
He said the RB25 boxes were piss easy to do, and very much like a toyota landcruiser box inside. (Show me them next to each other)
Anyway, here are some points for you:
- I got my bearing kit from CBC bearings. They had a kit for the RB25 gearbox in stock. Cost $550. Had all bearings, pins, washers, springs (Whatever a rebuild kit consists of).
- I needed an input shaft because one of the gears that transfers power to the other shaft had the hardening coating wearing off between the teeth. (You could see the dark spots) The old dude said that it would probably last another 10,000kms to 20,000kms and start whining and put metal in the box. New Shaft from Nissan - $580.
- Driveline services charged me $650 to do the box after giving them all the parts.
- I didn't replace my synchros even though they were glazed and grinding between 1st & 2nd, and 4th & 5th. I simply bead blasted the cones on the gears so they were rough and the synchros could grab them again. I would probably bead blast the cones and get new synchros if I had to do it again.
After all of this, and about 2,000kms on the gearbox, some guy ran a red light and I crashed into him and wrote the car off. Sold the gearbox to a mate for $1800. lol. Its in a SR20 powered Datsun stanza now. They pulled down the box before installing it and he said that it was perfect inside. So driveline must have done a decent job.
Also, driveline offer a 5,000km 6 month warranty (Or some sort of warranty like that) on their work too. I think that's a winner. At least if they f**k it up, you won't be paying for it.