Gear Vendors 727 in a 69 RR

[Rustyiron]

Does anyone have a Gear Vendors in there car?

I am in the process of installing one in my 69 RR and wanted to see if others have one in there cars.

 

['68 383 Charger]

not yet, but let me know how it turns out. i'm rebuilding my transmission and installing a gear vender in Feb when i get back to the states in my 68

 

[68GTX4SPEED]

Not yet, but I am also in the process of installing one in my 68 GTX will be finished this winter, rearend will be 3.55 or 3.91, thinking about order a drivshaft from here what do you know about them.
http://www.victorymachine.net/index2.html
Sven

 

[Rustyiron]

I have installed it but am still in the process of wiring it. It is new picked it up years ago and installed it. Now just getting back to working on the car to get it on the road again.

 

[shag766]

o/d trans

Not yet, but I am also in the process of installing one in my 68 GTX will be finished this winter, rearend will be 3.55 or 3.91, thinking about order a drivshaft from here what do you know about them.
http://www.victorymachine.net/index2.html
Sven

i don't know if this means anything to you but, i put a tko 5 speed in and i have 3;90 gearing. the o/d ratio on the trans is .64 and i find unless you are doing at least 50-55mph it feels like it is lugging. in hind sight i could of used 4;10 ratio rear. but i think that depends on the o/d ratio. .02 cents

 

[68GTX4SPEED]

Gear Vendors ratio is 0.78 so 3.55 will be like my present 2.76 (GV 2.77) and 3.91 will be like 3.05 and thats good when gas here in Sweden cost $9 gallon

 

[shag766]

oops; my ratio is .64

 

[68GTX4SPEED]

In my opinion 0.70 should be optimal, just like the Passon 18 spline 5 speed.

 

[68X426]

Hey Rusty, I've got the GV in my 68 Hemi Road Runner, with a Dana and 4.10s.

It's a perfect combination, great on the street, great cruising.

The rpms range from 2200 at 55, 2600 at 65, to 3000 at 75. I get the best gas mileage at 75 (16 mpg vs. 14 mpg at 55).

 

[Rustyiron]

I still have the 3.54's in mine so I am guessing a gear change will be in order at some point. Will have to see what it is like on the road. Will send you a PM.

 

[68X426]

I still have the 3.54's in mine so I am guessing a gear change will be in order at some point. Will have to see what it is like on the road. Will send you a PM.

My two cents - I think a gear change is in order right away. I think you will be quite unhappy with the GV and 3.54s (and 3.91s too). Here's why.

As you identified, the 3.54 is reduced to 2.76 final. Great for cruising. Except:

1) what are your driving habits and style
2) what are your driving conditions (flat, rolling, mountains)
3) what is your tire height and cam power range
4) how do the three factors above come into play thru the complete driving spectrum you experience now and then expect in the future with the GV.

The 2.76 ratio gives you a shift point from 3rd to OD of 1500-1600 rpms (shift is at 45 mph for most applications). 1600 is at or below the power range of nearly all cams. You will be lugging on every shift. Or manually shifting so to not lug, and then what's the point of the automatic?

Three considerations - much taller tire, different cam, or taller gears (4.10 and up) (or a combo of all three).

I don't think you can put a tall enough tire in to compensate for the cam at 1600 rpm (my calulator showed that a 30 inch height still has a shift point below 2000). Do you want to change the cam (if needed)? Best option is the taller rear end gear.

The 3.91 yields a shift point at 1750, still low and "luggy". The 4.10s get you close to 2000 rpms and likely closer to the low end of the cam range.

The whole idea is to find the sweet spot in the 4-way combination of: tire, cam range, gear ratio, and the GV. Seems to me you want 4.10 or higher from the get-go. Or a cam that can match up to the 3.91s.

Food for thought. Dan.

 

[shag766]

food for thought.

 

[6pakdave]

Not a Mopar, but an Aussie fitting a GV in a Fairlane,pix and some info he had to deal with.

http://www.usmuscle.com.au/Forum/showthread.php?t=7185

cheers Dave

 

[Alx69RR440]

install on a 68 RR

Here are some pictures and some install info on a 68 RR


http://69roadrunner.net/phpBB3/viewtopic.php?f=9&t=2883&hilit=gear+vendors+overdrive