late 99 550 trans and diff question

[DaveBen]

3.73 or 4.10 are the two most used ratios. I have 3.73 and I can cruse down the road at 70 mph before the revs start to get over 2000 rpm.

Dave

 

[mspainting]

I have been looking at 4.10s because I also have a big heavy 5er 15000# & Arkansas has lots of hills , I guess the real ? is how much do you drive with 5er how much does it weigh & what kind of mods do you have

 

[WD40]

Look for a 2 speed auxiliary transmission ?

I Think what you are looking for is a
Brownlite trans. AKA-Brownie.
It has a Under-Direct-Over gears. with a single
stick. Behind the 4 speed on some of the old trucks. (a long time ago)
You mite try a truck wrecking yard.
Good Luck!