RUNAMUCK Posted October 22, 2016 Share Posted October 22, 2016 So I've been fucking with a diff.swapped in a head from a cedric into a 620 housing. going from a 4.8, to a 3.9. The old head (which I have no idea where I put) had what I now know to be called a thrust block in the centre between the side gears. Seems the ends of the axle rub against this block, as part of the axle bearing free play adjustment. (Wheel bearings are cup and cone arrangement) So know I either gotta find on and try fit it to my center, or make one, and fit it. I guess my question is, is this system very common? Seems a bit mickey mouse to me. Quote Link to comment Share on other sites More sharing options...
Frosty Posted October 22, 2016 Share Posted October 22, 2016 Not common unless a semi floating axle. Replace the bearings with a roller type and you won't need the block. Probably be easier and cheaper than getting a block made up, I imagine the tolerances will be a pain to work out. Quote Link to comment Share on other sites More sharing options...
johnny.race Posted October 22, 2016 Share Posted October 22, 2016 Yeah, its common in Courier/Mazda diffs. The end of the axle butts up to the block and the gap/slack (I never understood how it all worked) was sorted out using shims. A cunt of an idea if you want to narrow one of them. The courier is every bit as nuggety as a Hilux but its got this cunt axle preload setup going on which makes them not as popular for narrowing. . 1 Quote Link to comment Share on other sites More sharing options...
fletch Posted October 23, 2016 Share Posted October 23, 2016 Give me the 3.9 and you won't have the problem Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 23, 2016 Author Share Posted October 23, 2016 You wish lad!But yeah it's a cunt. I've been persuing lines of inquiry into some 720 diffs which may be able to donate their blocks. Quote Link to comment Share on other sites More sharing options...
cletus Posted October 23, 2016 Share Posted October 23, 2016 my navara had the same thing in it, they dont like big one wheel peels, the end of the axle gets melty i had a lsd put in it to fix that problem Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 23, 2016 Author Share Posted October 23, 2016 H190, H230, or C200?I was wondering about if an lsd would have something in the center for the axles to butt up against? I'm happy the H190 is strong enough. But the P.I.T.A. factor is high. If I hadn't just had my housing powder coated I'd be saying fuck it and shortening up a 260C diff instead. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 23, 2016 Author Share Posted October 23, 2016 What flavour of lSD was it? Quote Link to comment Share on other sites More sharing options...
cletus Posted October 25, 2016 Share Posted October 25, 2016 I think the lsd guts were r200 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 25, 2016 Author Share Posted October 25, 2016 Ah. so it was a c200 then? Solid axle version of the mighty rfb r200. I've sourced a replacement thrust block. Quote Link to comment Share on other sites More sharing options...
- i5oogt - Posted October 25, 2016 Share Posted October 25, 2016 Give me the 3.9 and you won't have the problem you would be second in the queue if it was ever for sale Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 25, 2016 Author Share Posted October 25, 2016 It might well prove to be too tall. But it's still better than the eleventh billion to one diff that Datsun put in them. 1 Quote Link to comment Share on other sites More sharing options...
Get it done Posted October 26, 2016 Share Posted October 26, 2016 You maybe be able to run a eaton two speed diff? Quote Link to comment Share on other sites More sharing options...
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