3.73 ratio third members from a FJ60 to an FJ40

[brooklyn]

I was reading on the main MUD site that using a 3.73 diff from a FJ60 would give me a better highway driving than my stock gears - 4.10s.

I am running a V8 with an SM420 and was wondering what "improvement" I would get. Has anyone done this or know anything about how this might change my ride.

Any ideas,

 

[dreko]

Hey Joe
I've read the exact same thing... 5 speed, and 3.73 will allow higher speeds, lower revs...
I wish I knew what was involved in doing the gear swap tho...

A

 

[woytovich]

Swapping diffs 60 to 40 is nothing except putting them in and dealing with the different driveshaft flanges... can be done in a number of pretty simple ways... Oddly I have 2 FJ60 diffs sitting here on Long Island looking for a new home...

Mark

 

[woytovich]

Dealing with the flanges is just a matter of getting a pair that match your driveshafts from Cruiser Outfitters... or swapping the short ends of your current 40 driveshafts with the short ends from some 60 driveshafts...