Overdrive driveline

[hd4tools]

Has anyone added a Gear Vendors overdrive unit to their truck? I found a few old posts about people looking to do it, but no follow ups.

I'd like to do more highway cruising with my truck, but the NP435/ 4:10 Dana is limiting that. I've looked and the lowest gear offered for a Dana is 3.54. Still not the best for the highway.

[PwrWgnDrvr]

Russ Roth had one in his 68 W200 BB truck, but he's not around anymore.

[Sweptline66]

I'm about to pull the trigger on one. Waiting for GV to get back to me; the only question I have left is if I get a 2" lift how much it will affect the OD unit, vibration, etc. Got a '66 W200, 4:10 gears as well. Will report back/post once I get the GVOD installed.

[martincom]

As it has the Dana, I'm going to speculate the truck is a D200. Does it have tall tires? If so, the 3.54:1 would be about as steep as you'd want to go. If the truck doesn't have tall tires/wheels, you may want to research how tall you could go and spend your money on rims/tires. If you're still not happy with it after that, change to the 3.54:1. Changing anything within the differential of Dana requires a lot of $pecial tools...don't ask me how I know.

Regardless, I'm thinking this would be a better, more cost effective route than an OD and you're not making a Frankenstein out of the truck, which will have a big impact on it's resale value.

[PwrWgnDrvr]

Has anyone added a Gear Vendors overdrive unit to their truck? I found a few old posts about people looking to do it, but no follow ups.

I'd like to do more highway cruising with my truck, but the NP435/ 4:10 Dana is limiting that. I've looked and the lowest gear offered for a Dana is 3.54. Still not the best for the highway.

I turned over the odometer twice in my 70 W200 with the 4:10/435 and 9.50 x 16.5 tires. Was my daily driver work truck and NEVER had an issue at 65-70 on the freeway. One trip was CA to Michigan and back. Max I ever got it to was 105 MPH. Vibrated so much the dome light started flickering
BTW, ALL trannies are the same ratio output in top gear, unless they're OD, so the tranny is irrelevant.