TOMUCH wrote:'86-95 IFS trucks, 1st and 2nd gen 4Runners, and all '93-98 T100s use a 7.5" front diff that is offset to the passenger's side. Later models came with ADD (Automatic Differential Disconnect) which uses a vacuum actuated mechanism to disconnect the drivers side axle shaft from the differential. Carriers and gear sets are interchangeable between the two different versions (and also happen to be the same as used in the 2wd Toyota pickup 7.5" diffs). One difference between ADD and non-ADD diffs is that the carrier in an ADD differential has needle bearings supporting the axle shafts at the differential. The non-ADD diffs did not have this bearing and sometimes the passenger side axle flange wears the carrier and becomes loose or wobbly, eventually causing oil leaks, noise, and possible spider gear damage. ADD and non-ADD diffs are swappable as are most of their parts. This makes it possible to change your ADD diff to non-ADD by simply swapping parts. This is desirable to some people since some of the ADD stubs are smaller diameter than the non-ADD stubs and are therefore slightly weaker.
DeadlyBeast wrote:Unleashed all those horses all at once?
rory18 wrote:Besides changing out the whole rear end I don't know of any stronger 8" diffs. Finding it hard to believe the power you are making is lunching diffs so easy. Maybe a silly question but the rest of the drive train is OK?
rory18 wrote:Hmm, you maybe on to something. Prado are not the thick cut type of gear in the 3.9:1 and higher format? Wondering now if that is the difference
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