Roger87ea82t

I guess I would probably be better off changing the Trans. and rear diff. and go with the 3.90. I dont want full time 4WD. So my question now is will I also have to change the axels? Are they larger on the 3.70 turbo trans and rear diff?

Has anyone had expierience with changing the final drive gear ratio from 3.90 to 3.70? I have a pushbutton 4WD 5spd in my 87 gl-10 turbo that has a 3.70 output. I would like to install a D/R 5spd, I found one with the 3.90 ratio. Can I just swap out the final gears on these transmissions? Will everything interchange? I would like to keep the 3.70's for better mileage, I also have heard the axels may be larger on the 3.70 But I haven't compared them. I don't know how hard these trannys are to work on. Would I be better off waiting untill I come across a 3.70 D/R?.......Roger