Join Date: Oct 2001
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Re: do\'s and don\'ts of gears?
No, not "any" D44 gears will work. As Burned said, they need to be High Pinion (reverse rotation). TTB does not matter, there are solid D44 that are high pinion, same gear.
Carrier change for the front (Dana Spicer stuff), the 8.8 is Visteon (sterling) or "Ford" and requires no carrier change (all gear ratios will work on a single sized carrier). Need the setup/install kits (shims, bearings, etc.)
Gearing is a BIG decision.
Just because someone told you your MPG's will go up by gearing lower (numerically higher) do to your OD, I would not necessarily believe it. There is a limit to this that you arrive at quickly. The trick is being able to utilize your OD, lowering highway RPM, without much lugging. The factory does a decent job of setting up the gearing to work with the motor. when people start changing that "sweet spot", the motor usually responds with poorer MPG's.
whoa, back to big decision...4.10's or 4.56? Either are good. If you know you will never go bigger than 33's [img]images/graemlins/grin.gif[/img] 4.10's will be great with either V8. move to 35's, and 4.56 is best with 302. Most folks run 4.56's with the 5.8 and 35's or so, but they all complain of mileage. I still get fairly good mileage running the 4.10's (5.8 motor).
EDIT: don't forget though, since you brought mileage...those gears will make your truck feel lots more peppy, especially 4.56, so...can you keep the right foot on the egg? if not, your planned MPG increase will go [img]images/graemlins/thud.gif[/img]