The Stovebolt Site Forums The Parking Lot Big Bolts Electric overdrive Chevy 6500-57

Is there any overdrive to use for my truck?? Now i dont feel good doing more than 70km/h(about 45mp/h).I wanna go faster

Your choices are an O/D transmission, larger diameter tires or a higher ratio rear end gearing or two speed rear perhaps. You'll need to post what you currently have for the BigBolt gods to be able to help. The full model, gvwr, model year, etc. is all of help.

Conny,If you have a 2-speed rear-end,as I'm pretty sure you do,(6500-Series,probably 18,000 gross),you may have "her" set in the "low-side",(rear-end gears). Mine was set on the "low-side",and my top speed was around 40-45,if I pushed it. I found the answer here on Stovebolt,so I thought I should pass it on. Hope this helps. B.T.W... Now I can run comfortably (without over-revving the engine) at right at 55 M.P.H. Fast enough for me,but I don't use the Interstate,either.

You can get a ranger overdrive http://www.advanceadapters.com/products/pn-760001m-27/ this is what I have installed on my truck to help bring the rpms down when Im on the highway, I also replaced the ring and pinion gears with a 4.88 ratio. So now I can cruise at 65 turning under 2500 rpm.

I have a gear vendors OD unit in my motorhome and it is very slick. Has a magical box that automatically shifts it into OD when I hit 40. Has a dimmer switch on the floor to shift out of OD when needed. Expensive but slick, thankfully my MH came with it.

I have a OD Brownie box in my 46 GMC. It works fine but nothing like the GV unit.