Stormbringer Posted August 9, 2023 Share Posted August 9, 2023 My son and i run our converted 7's on 4s and use a 17 tooth pinion. They go pretty well on this and dont get to hot We use a hobbywing max 8 esc with a 2200kv combo Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted August 9, 2023 Share Posted August 9, 2023 A couple of links to my st and 7 conversions 1st the st showing washers on st And my Hyper 7 conversion hat should help you out 1 Quote Link to comment Share on other sites More sharing options...
locky Posted August 9, 2023 Share Posted August 9, 2023 3 hours ago, beenq said: Just a nock up, has anyone shortened the 3rd leg as it seems a fair bit to make up ? I've added a pic to show what I mean Either raise all the diff holders or chop it. 1 Quote Link to comment Share on other sites More sharing options...
beenq Posted August 9, 2023 Author Share Posted August 9, 2023 Thankyou both, storms appreciate the links mate loving your work, will go with the same as you then a 17 tooth, I have the exact same combo as you Locky, I'm thinking I might just chop the 3rd leg level as its gotta be more solid on all 3 legs, to be honest though that mock up has got it proper solid and the screws fit perfect now after some dremelling , might leave like that and try it out, I'll keep updating as I tickle along 2 Quote Link to comment Share on other sites More sharing options...
Redback Posted August 9, 2023 Share Posted August 9, 2023 (edited) There should be stand offs for the other part of the spur gear diff bearing holder thats why its sitting low, where are these, or the holder is upside down, dont do any cutting yet m8 Edited August 9, 2023 by Redback 1 Quote Link to comment Share on other sites More sharing options...
locky Posted August 9, 2023 Share Posted August 9, 2023 1 Quote Link to comment Share on other sites More sharing options...
beenq Posted August 10, 2023 Author Share Posted August 10, 2023 Hi Redback, are you talking about the silver mounts in lockys picture above ? If so yes I have those in place and at the bottom of the diff, your right in what your saying if that's upside down it really throws it out and the one pic I've posted does look major out. It was the 3rd leg on the motor mount that was throwing me all lop sided in the other direction so hopefully that's sorted with the spacers I've put in. Thanks for adding in though seriously I appreciate all input Quote Link to comment Share on other sites More sharing options...
Redback Posted August 12, 2023 Share Posted August 12, 2023 (edited) On 10/08/2023 at 07:12, beenq said: Hi Redback, are you talking about the silver mounts in lockys picture above ? If so yes I have those in place and at the bottom of the diff, your right in what your saying if that's upside down it really throws it out and the one pic I've posted does look major out. It was the 3rd leg on the motor mount that was throwing me all lop sided in the other direction so hopefully that's sorted with the spacers I've put in. Thanks for adding in though seriously I appreciate all input Yes, the 3rd leg on the mount is odd, its not a hyper mount from the looks of it, so you may have issues with fitment. Aslong as you have the standoffs and the diff holder is the right way around it should be flat, so that could mean the motor mounts to tall. Edited August 12, 2023 by Redback Quote Link to comment Share on other sites More sharing options...
beenq Posted August 31, 2023 Author Share Posted August 31, 2023 (edited) Hi all , right I've meshed the pinion and diff spur , but I get a horrible noise from the diff as if something is slipping inside, is this normal ? Could the diff be shot ? It's almost like it's too tight within the diff , sounds horrible Edited August 31, 2023 by beenq Quote Link to comment Share on other sites More sharing options...
locky Posted August 31, 2023 Share Posted August 31, 2023 Have you previously used the centre diff without issues or recently taken it apart? Only way to check is to strip it down, You should be able to rock spur gear against the pinion gear so that there is a small bit of play, you dont want a tight fit. Assume you also are using a mod 1 pinion. Sometimes different gears make a different noise. Quote Link to comment Share on other sites More sharing options...
beenq Posted August 31, 2023 Author Share Posted August 31, 2023 Hi locky, yes used it without issues, I've had it apart , cleaned and filled with diff oil (all looked perfect inside) I did put 30000 in the centre diff ? I did wonder if I have something slightly off on the level of the diff/spur and it's causing it to be hard work but when I say it sounds awful it really does , yes it's a mod 1 pinion, I'm thinking of stripping it all back off and starting again , put thinner diff oil in, chop that 3rd leg on mount so it all sits flat instead of having to build uo the mount level to match , anything else you can think of , thabks for replying , appreciate it Quote Link to comment Share on other sites More sharing options...
locky Posted August 31, 2023 Share Posted August 31, 2023 Check how it feels when you turn the diff by hand before disassembling the diff again. Have a good look at the teeth and colour of fluid. Quote Link to comment Share on other sites More sharing options...
beenq Posted August 31, 2023 Author Share Posted August 31, 2023 OK will do, keep you posted , felt smooth as silk when I put it back together before , little different to when grase was in it as its now full of fluid but didn't feel bad Quote Link to comment Share on other sites More sharing options...
beenq Posted September 4, 2023 Author Share Posted September 4, 2023 Hi, well decided to go the full hog , stripped it all back offopened diff back up (all looked lovely in there) , decided to lower the 3rd leg on the mount to match the rest and put it all back together , still a bit of noise but nothing like before so I'm not sure what has changed (maybe the level has helped ?) Picture below , onto the next bit lol 1 Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted September 4, 2023 Share Posted September 4, 2023 Glad you sussed it out tho Quote Link to comment Share on other sites More sharing options...
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