what is up with my driveline.....evrytime i shift into D or R from P or N the car "squats"...is this good, bad? is it loose u-joints? i also would like an opinion on rear end gears. i have 2.73's now...my dad has 3.92's in his truck and the thing marches......he has the new 4.7 dodge dakota and it consitantly gets 19 mpg in mixed driving.....what gears do i need to acheive this? im thinking the 5.17's and 4.10's would take my gas milage to about 5mpg.....whats a good in-the-middle gear ratio...3.23, 3.42, 3.73, or 3.93's?

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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

GONE MUSTANG HUNTING.......
BACK IN 10 SECONDS

 

IMO 3.42.