Gearbox rebuild

Hey all, you have all seen this before and i know the easier option is to buy one from coz. BUT im cheap when it comes to money i could save, so why not. Im looking at putting this kit through my MT:

http://www.drivetrain.com/parts_catalog/manual_transmission_overhaul_kits/nissan_fs5r30a_overhaul_kit.html

Hope the link works aha. Pretty sure its for the earlier style of box (non 98+)
My brother who has done a few boxes before is giving me a hand. He says it cant be too hard, just needs time and care. We shall see haha, hopefully get it done over a weekend.

Anyways my question is, is there anything that isnt specifically in that kit that would be worth replacing while i am there? Personally never done this before, so any experience shared would be greatly appreciated.

I found this guide which may be helpful for anyone contemplating the same move; http://beergarage.com/PathTransmission2Prep.aspx

Thanks for your time, and maybe advise aha
Trent

 

Hi mate. Is this that box from Chilledpain?

From what you've linked, the bearing kit looks to have all the goodies required.

Did you purchase the kit with the synch rings or just the bearing kit only?

If you get yourself a copy of the workshop manual for when reco'ing the box, and follow it thoroughly. You'll be fine. It may look a bit daunting but with the right set of basic tools, its easily achieved. Biggest thing is having the correct pullers. This can be the snooker point for any home job.

Once complete, its a must to visually inspect that it all meshes up ok while rotating and selecting gears. The gear set will let you know when something is off.

Also lastly, just keep a good eye out for all the shims that come out of it. These are a varying part to which set preloads and so on. Ideally you're meant to readjust them when doing new installs, but most of the time you can get away with it just using the old stuff. Just dont loose any of them

Have fun.

 

Nope, it is the box currently in my car ATM. Ill be purchasing the bearing plus syncro kit, might as well do it all at the same time.
Ill update as i go, few weeks away though. Im looking at hiring a press from coates hire, have a puller set already with four or five different jaws. Hopefully sufficient!
Thanks for you advise, muchly appreciated.

 

A nice trick I like to do when replacing synchros in used transmissions.
I dont know how this works on a multi-piece synchro tho. Youll have to check.

Youll find that the syncro rings will wear matching shallow grooves in the related cone. In a badly abused geabox, the grooves can be quite deep.
Replacing the synchro rings onto used and grooved cones is a little like just re-ringing and old engine and hoping the rings seal in the old glazed bores.

Using fine valve grinding paste, gently hand lap each synchro ring onto each cone. Just the same method as lapping valves..back-forth-back-forth and then lift and rotate 1/3 turn and repeat several full turns.

Do this LIGHTLY until the glossiness goes out of the grooves on the cones and the "teeth" inside the synchro ring just have a slightest "flat" instead of a sharp point as they are new.

Go easy.....Just a bees dick. You are basically wearing out the synchro ring in high speed so use ur loaf.

The synchros will not require any "run-in" and will shift smoothly and without any crunching and feel like new straight up!
Dont go crazy with the lapping as the synchro ring is usually soft/sacrificial and will wear quite quickly compared to the steel cone. Its just a slight deglaze.

Also, another trick, if its not already specified in the manual is, before removing selector rings, mark the selector rings and the matching splined hubs so the selector rings engage with exactly the same splines on reassembly. Think marking the cam belt and pulleys and then re-installing kinda thing

Youll be rewarded with a smooth shifting, no crunching box that will handle stuff like 5th to 2nd gear shifts without matching revs with ease!

E

 

Its a good point about the mating of the rings. Ive heard of this being done before and with success. As mentioned you really just have to dull off the sharpness of the new components. Nothing more.

GL with the upcoming rework =)

 

All great things to know! Thank you, its small tricks like that which make an amateur job just that little bit more professional. Ill make sure to give that a go

Actually quite looking forward to this, one of the few things left to do on this car that i havnt had a go at yet. Soon to be rectified hah.

Ill report how it goes, might help someone else in this situation later

 

Thats great as long as you don't need any other parts...

Mine was done a couple years ago, and while apart, the guy doing the job found it needed a shaft replaced, and some other part having to do with reverse. Nissan didn;t have them. Luckily, Joe from Zspeed performance had a 99 spec that had been replaced under warranty and it had the parts I needed.

 

Hmm i notice that the ebay kit you listed mentions they dont come with speed gear needle bearings. Does anyone know if it is worth sourcing that for replacement as well? That is a cheap kit! especially if it has everything required in it.

And yes, im really hoping for not too much damage when i open it up. If any of the shafts or gears are too far out of spec, it could cause some probems sourcing the bits.

 

i got a similar kit from atc (australian transmission components) there is a branch here in whelspool you should talk to them