someone had asked how well the GV overdrive works...

[Don Tanklage]

i couldnt find this at the time -

NV4500 5 Speed Manual w/ Gear Vendors Overdrive

Axle Ratio 4.10

First 23.00
Over 18.40
Second 12.46
Over 9.96
Third 6.85
Over 5.48
Fouth 4.10
Over 3.28
Fifth 3.03
Over 2.42

works great! i love it. there are a couple of things to note tho...

it will not have enough pump pressure to shift into overdrive when you are in first gear. not like that is a issue, first is SO low. you can split the rest of the gears although 4th to 4th over is only a 100 rpm drop. that is hardly noticable if you are not towing. however, if you are towing, and trying to keep your rpm's right at 1800 for milage, that small split will work great when you are tucked in a long line of semi's (if you choose a tire with the right roll out). when not towing 1800 in 5th over and you are passing just about everyone, and getting great mileage doin it!

i am running 4.10's and a 35" tire

don