Join Date: May 2003
Location: Tinton Falls, NJ
If we are talking about the MN12 IRS, the axles are not the same between the 2, but they are interchangable. The V6 cars with the 7.5 got smaller diameter and weaker axles, but you can put 7.5 axles in an 8.8 or 8.8 axles in a 7.5 with no problems. The only thing I can think of about grinding would be machining the spider gears from a non-IRS trak-lok unit to allow the circlips to compress, cause if you don't do that, and you put a diff out of a solid axle into the IRS unit, the axles will go in just fine, but they will never come out again.
-91 Cougar LS, coming soon, complete overhaul
with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad