Today was a big day that started off early, before 7am starts in the shed are very rare events but it happened today.
After a wasted afternoon yesterday I didn’t have the gearbox sealed as I’d planned - I got sidelined from my plans is probably the best way to put it. Anyway...
Up early this morning, prepped all surfaces for sealing. Sealed the front cases, sorted out the transfer case and rear bearing plate assembly too. Bolted it all together, only to find that when I went to sort out the diff preload/backlash (I cant remember which is which), I couldn’t for the life of me rosette the input shaft unless I used some vice grips, even then it was super difficult. Round one before the centre diff assembly went on (and the point you should mess around with the diff settings if you’ve changed anything such as front diff bearings):
Box stripped down again. At least the centre diff section didn’t need full disassembly. I thought it was the upper shaft front bearing not seating on the dowel pin properly. Turned out it was a jammed synchro on the input shaft, the one that deals with the low range. I put it in with the input shaft. It has three slots for the retainer tabs in the low range selector hub to live in and stop the synchro ring from rotating freely.
With that sorted and the sealing surfaces cleaned and prepped again, the gearbox came together without issue. While still on the bench, engine side down, I sorted the diff settings (I had previously replaced the seals and put the O rings in once I was done messing around). Centre diff housing assembly went on and the box was sorted for install. Round two - done and ready for install:
Dad came up and before the box went in we looked at the front left driveshaft. Outer joint was dry, we opened it up, cleaned out as much of the dried out grease as possible and packed in some fresh moly grease. It felt much better rotating the joint after this, nice and smooth! Hopefully that effort will pay off with the wobble disappearing.
Once the CV shaft was sorted we got the gearbox slotted in easily from under the subi; subi on ramps, gearbox on wooden blocks strapped down on a motorcycle jack. Best way to do it!
The drive shafts slip on as the gearbox approaches the engine while being raised up. I think this is the fourth or fifth time I’ve done a gearbox this way now. No need to jack up the front end and pop ball joints out.
After the gearbox was in, all the other bits came together relatively quickly. After all that was done and before the exhaust went on, we replaced the steering rack boots. The repco units weren’t a great fit and the cable ties supplied were rubbish. A set of quality cable ties now hold the boots on the rack snugly.
Some brake maintenance up front was done too - replacement caliper brackets with freshly greased caliper slide pins were installed. These were sourced with factory caliper retainer bolts. Someone used non OEM or automotive spec bolts to hold the caliper on. They were a 13mm bolt head as opposed to 14mm. I didn’t like that plus the slide pins weren’t great, so I finally got that sorted.
Now I’ll be eagerly waiting for work to finish so I can get home and fill the gearbox and rear diff with oil (the silicone used on the gearbox needs this time to cure before meeting oil), replace the airbox and go for a drive!! Hopefully there won’t be any wobbles, vibrations or noises other than that of the sweet sweet subi burble this thing has, even with the clapped out rear muffler - that’ll be sorted this week all going well.
Cheers
Bennie
PS - my new Ryobi 18v kit has a “wizzer” tool in it for tightening/loosening bolts an nuts. This tool copped a flogging with this gearbox build and install. It makes things so much quicker and less physical
