reb78 Posted March 21, 2017 Share Posted March 21, 2017 What's the process for changing the output seal on the back of the LT77 gearbox? Once the transfer box is down, can it be done in situ? Quote Link to comment Share on other sites More sharing options...
Chambo110 Posted March 21, 2017 Share Posted March 21, 2017 Hi yes it can but collar is a bitch if you ain't got special tools check this I did mine but left the collar in situ. And mine was on bench i thought about winding the tape round to get over the groove but then read somewhere else to try this Remove old seal by drilling and tapping a small screw into it. Then use plastic from an old yoghurt pot to wrap around the collar, cut and tape together so there are no overlaps in the plastic. Remove the 'yog pot special tool' from collar. Put your seal on your new 'special tool' without damaging seal and the slide the tool with attached seal onto the collar. Once yog pot tool is over the groove slide seal down your tool and onto the collar then remove your new "special tool". Job done not wanting to add to your workload but while tbox is out I did my clutch, release bearing, new hd fork, and rear crank oil seal worth thinking about while at this stage good luck Quote Link to comment Share on other sites More sharing options...
Les Henson Posted March 21, 2017 Share Posted March 21, 2017 The reason you make a guide is that there's a possibility that you can damage or reverse the lip of the seal. You can do it by hand, but be careful. If you make a plastic applicator, then be careful as there's a risk that you can over stretch or even split the lip of the seal. Les. Quote Link to comment Share on other sites More sharing options...
Chambo110 Posted March 21, 2017 Share Posted March 21, 2017 Seemed to work on mine.. no leaks as yet... at least not from lt77. But would always bow to Les and Westerns superior knowledge. Everything else leaks. But I try to look on the positive side of at least I always have fresh oil in everything all the time ?. Wife not as impressed with my part of the drive. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted March 21, 2017 Share Posted March 21, 2017 Ive made a tool to remove the collar Richard. Do you want to borrow it? Quote Link to comment Share on other sites More sharing options...
reb78 Posted March 23, 2017 Author Share Posted March 23, 2017 So I'm curious to get some more thoughts on this. The oil levels were correct about 6 months ago when I last had the boxes off. Now, I thought I had a properly sealed set of gearboxes finally, but noticed a drip on the drive (that's what started me off on this thread) coming off of the front bottom bolt of the transfer box plate. What would you folks deduce from this as the cause of the leak (if you can from this info) Externally, oil is primarily appearing to come down the front face of the transfer box where it meets with the main gearbox. On checking the oils, I had to add a tiny amount of ATF to my overdrive, over 300ml ATF to the LT77 and I drained just over 200ml from the transfer box. The oil drained from the transfer box was not a golden colour, but had a red tint to it. What are your thoughts? Quote Link to comment Share on other sites More sharing options...
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