I was thinking about switching my 3.55's with either 4.10's or 4.56's. I heard that a good install on gears was important, so I was wondering if any you DF members knew of a good shop in Northern California, around the Sacramento area to do the work?

 

4 Wheel Parts
1900 El Camino Ave
Sacramento CA 95815

• 1-800-517-0989 open until 9PM PST
• Mon-Fri: 9am - 6pm (Local Time)
• Saturday: 9am - 3pm (Local Time)
• Sunday: Closed

• Store Manager: Bob Thilman
• Asst Manager: Mark Ori
• Service Manager: Alan Mackiewicz

 

yep, 4 wheel parts is a good place to go!

and dont forget they price match!!

 

I have had good luck going to a dealer and talking the the rearend guy there and having them do it on the side. Some will, some won't. I got my gears in my Mustang for $50 labor, but that was several years ago.
You might also get lucky and find a 3.92 LS rearend at a salvage yard for the same price as the gears. Then it's just a bolt-in job. You would only need a dealer or a programmer to correct the speedo.