Outer Limits 4x4 Board

ive just finished the sas on my lux its 2000 td its got 3.7 diff gears in the rear atm and 33s took it for a drive on the highway to check the speed did 110 at just over 2000rpm what would it rev at stock at this speed ive had a bit of a look and cant see that anyone makes after market 3.7 gears i have a set of 4.5s i was planning to put in but now think it will rev way to hard i do most of my driving on the highway just tryin to find best solution get aftermarket gears for front or out in 4.5s an maybe go up to 35s or something else thanks for your help

My solid axle LN106 has stock 4.3 gearing and from memory it is close to 3000 at 110 on 235/75/15 rubber. I now run 32" and obviously i revs lower at 110 but the speedo is out as well so it's hard to say exactly what it revs at. I find 4.3 fine at highway speeds with a Turbo - before I turboed my 3L it was a dog to keep at 100 but that's a seperate issue.