Reply With QuoteThe side gears only have a thrust bearing on the inside. When you drive the side gears thrust in one direction. Truetracs are setup so they they thrust in when driving forward. If you put them in he other way you would get wear over the long term.
YarnMaster
Supporter
Rover diffs: Truetrac different front and rear but Ashcroft Transmissions ATB same-sa
Out of interest, anyone know why Eaton's Detroit TrueTracs are different depending on front or rear application yet the Ashcroft Transmission ATB seem to be the same regardless?
E.g. the Eaton catalogue < http://www.eaton.com/ecm/groups/publ.../ct_128302.pdf > on p. 12 lists 912A407 for front application of Rover Type 24 spline diffs and 912A383 for the rear.
This is also the case if purchasing the Eaton product from Ashcroft as you select front or rear from the drop down box when ordering < Ashcroft Transmissions>.
The equivalent ATB < Ashcroft Transmissions> makes no mention of being specific for one or the other or option to select.
Wizard
The side gears only have a thrust bearing on the inside. When you drive the side gears thrust in one direction. Truetracs are setup so they they thrust in when driving forward. If you put them in he other way you would get wear over the long term.
Wizard
You can change the Truetracs from front to rear by swapping the gears from side to side.
ForumSage
As above, Ashcroft ATB only come in 24 spline , Truetrac are available in 24 or 10 spline , So if you want to do a 10 spline front the only option is Truetrac unless you can obtain 24sp front axles ( no so easy in a Series )
YarnMaster
SupporterSo why don’t the Ashcroft ATB’s suffer that issue?Originally Posted by Red90
Wizard
Two different types of trutrac available ,the earlier one was front or rear depending how you set the gears the other one is preloaded and is suitable front or rear as is.I have been running a preloaded unit in the front for over 5 years and modified it to be fully locking but never use it as it does so well unlocked
AM
Master
Tell me more about this mod to fully lockTwo different types of trutrac available ,the earlier one was front or rear depending how you set the gears the other one is preloaded and is suitable front or rear as is.I have been running a preloaded unit in the front for over 5 years and modified it to be fully locking but never use it as it does so well unlocked
AM
Wizard
Just updated a bit more info MY 95 Dildo members rides section
Noel
YarnMaster
SupporterAccording to Dave Ashcroft:
I expected a bit more detail and not 'I think' given they designed and developed their own alternative and must have analysed the TrueTrac in depth to have done so...Hi,
I think the difference between front and rear on the Truetracs is due to the rear having more preload than the front,
Dave
< MY 95 DILDO >
Master
Difference between front and rear TruTracs (apart from the thrust direction on earlier models) is torque bias ratio. Essentially the fronts don't "lock" as much as the rears. From memory it is around 2-2.5 for the fronts and something like 3-3.5 for the rears. TBH I have a front in my D1 and a mate has a swapped-gears rear in his front, same D1 model. I can't pick a difference really. Both good
DiscoClax
'94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
'08 RRS TDV8 Rimini Red - 285/60R18 Falken AT3Ws, Rock slider-steps, APT full under-protection, Mitch Hitch, Tradesman rack, Traxide DBS, Gap IID
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