inchman Posted April 27, 2011 Share Posted April 27, 2011 hi all, can a 24 spline front axle truetrac be fitted to the rear 24 axle ?? cheers Quote Link to comment Share on other sites More sharing options...
Range Rover Blues Posted April 27, 2011 Share Posted April 27, 2011 I think I've read somewhere that they are axle-specific. It's possible they need adjusting or building to suite but I don't think they are a straight swap. Quote Link to comment Share on other sites More sharing options...
tuko Posted April 28, 2011 Share Posted April 28, 2011 Apparently you remove the side gears, flip them over and re install to change the direction of rotation (from one axle to another). To set preload, I'm not sure how that is done properly on the truetrac diff, so I'll leave to the experts. Todd. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 28, 2011 Share Posted April 28, 2011 Don't think there will be any preload as its not a limited slip diff.... Quote Link to comment Share on other sites More sharing options...
tuko Posted April 28, 2011 Share Posted April 28, 2011 Don't think there will be any preload as its not a limited slip diff.... In a previous thread a few weeks ago Ian Ashcroft made a comment that the preload is different for the front and rear diff's on Truetrac's, where as Ashcroft LSD are set equally. To be honest I was left wondering by his comment and would hope that he jumps in anytime and enlighten me/us. I'm not sure how you would set the preload on a diff that has a few gears that sit in their individual pockets? Is it just a matter of tightening the casing bolts more ??? Todd. Quote Link to comment Share on other sites More sharing options...
M&S Posted April 28, 2011 Share Posted April 28, 2011 I have also read that front truetracs have a different bias to rear truetracs. Up to a few weeks ago I thought that they were interchangeable, now I'm not so sure. Quote Link to comment Share on other sites More sharing options...
luke keeper of badger Posted April 28, 2011 Share Posted April 28, 2011 i was looking at this a few weeks ago before i got the front....crown diffs has a good write up http://www.crowndiffs.co.uk/diffs.html#det_true im running truetrac front and rear in my 100inch...i like them but keep thinking about ashcrofts new locker for the rear.. luke Quote Link to comment Share on other sites More sharing options...
tuko Posted April 28, 2011 Share Posted April 28, 2011 im running truetrac front and rear ...i like them but keep thinking about ashcrofts new locker for the rear.. luke Same here! But with that said, I drove the same trials last weekend that I had to winch myself last year. The added traction from the truetrac's and how it comes on basically seamless really does make a difference....Those new lockers from Brazil are nice though.... Todd. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 28, 2011 Share Posted April 28, 2011 To be honest I was left wondering by his comment and would hope that he jumps in anytime and enlighten me/us. Yep, definitely Quote Link to comment Share on other sites More sharing options...
luke keeper of badger Posted April 28, 2011 Share Posted April 28, 2011 Same here! But with that said, I drove the same trials last weekend that I had to winch myself last year. The added traction from the truetrac's and how it comes on basically seamless really does make a difference....Those new lockers from Brazil are nice though.... Todd. Tuko i saw you youtube video the other day all four turning and going no where......lucky..... because you were filming....then in reverse...lol...nice demo.... luke Quote Link to comment Share on other sites More sharing options...
inchman Posted April 29, 2011 Author Share Posted April 29, 2011 thanks for all the replies, i found a "How to swap your true trac from fron to rear" on discoweb. cheers Gary Quote Link to comment Share on other sites More sharing options...
Escape Posted May 2, 2011 Share Posted May 2, 2011 Same here! But with that said, I drove the same trials last weekend that I had to winch myself last year. The added traction from the truetrac's and how it comes on basically seamless really does make a difference....Those new lockers from Brazil are nice though.... Todd. Those Brazilian lockers seem to operate the same way as a Detroit No Spin (i.e. always locked and hope it unlocks when cornering on tarmac), just a different explanation to make them appear a bit more fancy. I have installed a set of Ashcroft Airlockers in my P38a this weekend (originally considered TrueTracs), haven't tried them yet, but build quality is excellent! Quote Link to comment Share on other sites More sharing options...
inaine Posted May 2, 2011 Share Posted May 2, 2011 i recenty had crown refurb a pair of true tracs for my 90 including swapping a rear to the front, new diff bearings and seals. very good service Quote Link to comment Share on other sites More sharing options...
Mr Ian Posted May 2, 2011 Share Posted May 2, 2011 Hi for those really into ATB/LSD theory try this:- http://www.planet-9.com/reviews/cayman-performance-modifications/p306-atb2f-tbd-differential-comparison.html May be a litle heavy going but useful and thought provoking. Regards Ian Ashcroft Quote Link to comment Share on other sites More sharing options...
Mr Ian Posted May 3, 2011 Share Posted May 3, 2011 Hi I hope that link was useful, the preload is set by the 'dished thrust washers' and causes a drag on the sun gear as you do when applying a 'left foot brake' and this in turn loads the pocket gears. Note the truetrac only has 3 sets of gears, most others including ours have 6 sets of gears. In real terms this means the Truetrac has only half the bias potential of the 6 pocket designs. I really don't understand how changing the helical gears in their pockets changes anything, the thrust direction is still the same as the helix direction has not changed. As described in the previous article even when the opposite helix angle is used there is little difference to the torque bias or friction generated. Back to the original question I would have no problem installing a front truetrac in the rear, just means left foot braking to preload the diff. Within a relatively short time the 'extra' rear preload is lost anyway and then the rear could be used in the front with no detriment. Where these ATB diff come out clearly ahead is when used with ATC, the ATC brakes the spinning wheel, engages the ATB and away you go. Hope that has been of some help. Regards Ian AShcroft Quote Link to comment Share on other sites More sharing options...
Mr Ian Posted May 3, 2011 Share Posted May 3, 2011 Hi Gary tried to find truetrac,swap,front,rear on Disco web, no luck please can you give me a link. Regards Ian Ashcroft for all the replies, i found a "How to swap your true trac from fron to rear" on discoweb. cheers Gary Quote Link to comment Share on other sites More sharing options...
inchman Posted May 3, 2011 Author Share Posted May 3, 2011 hi Ian, hope this works, http://www.discoweb.org/truetracgears/index.htm so do you need to swap anything at all, or just mount the front truetrac on the rear diff ?? cheers Gary Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted May 3, 2011 Share Posted May 3, 2011 Thanks for your posts Ian, much appreciated! Quote Link to comment Share on other sites More sharing options...
tuko Posted May 3, 2011 Share Posted May 3, 2011 Jupp, Thank you Ian for the reply it answered my questions. Todd. Quote Link to comment Share on other sites More sharing options...
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