spanners Posted November 15, 2011 Share Posted November 15, 2011 My understanding is that the diff heads have 45 teeth/10 teeth making a 4.5, and 41/10 would make a 4.1 etc. Anyway.... I have a 4.5 in my car, but have a 41 tooth crown gear spare in my pile of bits. Can i change it without changing anything else or do the teeth have a different pitch or something on the corresponding gears? I dont have any other pinions lying about so am hoping i can use the ones from the 4.5? 4.1 would give a possible top speed of around 250ks. I dont expect the aerodynamics would let that happen but its more about the 3k rpm at 100kph... Im a diff noob really so just want to know whether I should bother trying Quote Link to comment Share on other sites More sharing options...
Valiant Posted November 15, 2011 Share Posted November 15, 2011 The crown wheel and pinion are a matched pair. Different gears mixed won't work. Quote Link to comment Share on other sites More sharing options...
spanners Posted November 15, 2011 Author Share Posted November 15, 2011 Gay. Cheers buddy Quote Link to comment Share on other sites More sharing options...
Valiant Posted November 15, 2011 Share Posted November 15, 2011 A 4.1 to 1 Hilux diff head shouldn't be to hard to track down though. Quote Link to comment Share on other sites More sharing options...
spanners Posted November 15, 2011 Author Share Posted November 15, 2011 Yeah but it was all about the $0 price tag attached to it Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted November 15, 2011 Share Posted November 15, 2011 Is a 4.1 the lowest ratio you can get for a hilux diff? Quote Link to comment Share on other sites More sharing options...
phatt20 Posted November 15, 2011 Share Posted November 15, 2011 Is a 4.1 the lowest ratio you can get for a hilux diff? 3.9 is the lowest ratio i know of, reasonably hard to get. i put one in my 97 hiace to drop highway revs, was originally a 4.1 made a big difference in roadnoise/fuel economy. Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted November 15, 2011 Share Posted November 15, 2011 Ah, sweet, I want to go as low as I can when I 1uz the lux, for those same reasons, chur. Quote Link to comment Share on other sites More sharing options...
mjrstar Posted November 15, 2011 Share Posted November 15, 2011 I run a 3.9 hilux in my starlet, it makes things scary at 245kph, I had a 4.3 in it before that which was good for around 220kph. I believe there is a rare 3.7 (ish) ratio available but this would probably not be that great for accelleration on a n/a 2 litre. Quote Link to comment Share on other sites More sharing options...
1vaknd Posted November 15, 2011 Share Posted November 15, 2011 also pretty sure all the utes from 2007 onwards run either 3.7 or 3.6 Quote Link to comment Share on other sites More sharing options...
slacker.cam Posted November 15, 2011 Share Posted November 15, 2011 Heh. My racecar has a 5.3 in it. Got revs? Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted November 15, 2011 Share Posted November 15, 2011 Yeh, I think the higher ratios are sort after by 4wd guys, if I could get a 3.6/7 that would be magic. Quote Link to comment Share on other sites More sharing options...
HighLUX Posted November 16, 2011 Share Posted November 16, 2011 http://www.trademe.co.nz/motors/car-parts-accessories/toyota/diffs-axles/auction-424264774.htm Swap the guts out of this into a hilux head? Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted November 16, 2011 Share Posted November 16, 2011 That would be perfect, as I need an LSD also, wonder how much you have to do to get them to fit? Quote Link to comment Share on other sites More sharing options...
HighLUX Posted November 16, 2011 Share Posted November 16, 2011 Similar to altezza torsen guts into a F series head? Possibly need a LSD hilux head as open bearings may be different sizes/profile? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted November 16, 2011 Share Posted November 16, 2011 ^^ correct open vs LSD bearings are different... but luckily with the adjustable side/preload nuts it's pretty easy to set up the backlash. Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted November 16, 2011 Share Posted November 16, 2011 Well, that sounds pretty easy, was thinking about it last night, just have to weigh up the advantages and disadvantages of a torsen vs a hilux plate lsd, for what im doing, the torsen will most likely be fine. Quote Link to comment Share on other sites More sharing options...
phatt20 Posted November 16, 2011 Share Posted November 16, 2011 hilux lsds are a fairly average lsd, strong enuf but dont have 'ramps' to increase limiting of slip in relation to torque input, and by the time you shim them up to work properly they may as well be locked, pretty sure i read somewhere that there is a place in nz that modifies them to accept ramping type setup tho? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted November 16, 2011 Share Posted November 16, 2011 http://www.raceenginesnz.com/Classic-Cars.html This guy does the hilux modification stuff. Quote Link to comment Share on other sites More sharing options...
kpr Posted November 17, 2011 Share Posted November 17, 2011 ^ better off buying a new trd (or similar) G code irs lsd, they fit with small mods and wont cost bugger all more, by the time you buy a hilux lsd then get it modified. have both the mod one and trd, both are good. but i'd go trd if was to buy another as for putting the irs gears in a hilux carrier. could be wrong, but i don't think they will swap over like the center does. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.