Re: please help me gears
The 7.5 and 8.8 axles are both 10 bolts. However, the axles are different size - 1.3" difference so the rear covers won't interchange. I find it interesting why you would try running 7.5 gears in an 8.8 axle. The spline count has to be the same if you wish to use the original axle shafts. Anyway, check here Yukon Gear & Axle
and these guys will be able to point you in the right direction. I've added on some photos just for reference, but to know if the gears are interchangeable between the different axles, you'll have to ask the guys at Yukon Gear.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!