Don't they make two speed rear ends for our truck? Gear vendors..... Don't they make and over drive for our trucks? I would like to have one of those

 

When the raggie blows up, put an NV4500 in there. No more 2nd to 3rd issue.

 

sounds like one heck of an idea ive been thinkin of the same thing ive already seem eatons being tossed at work for cracked cases and such maybe i should snag some and build my own, Naaaahhh to much work a two speed rear axle from a tow truck or straight truck sounds pretty cool and easy though double the fun

 

Back in the day I used to deliver wholesale hardware around LA from a '57 Ford fliptop deuce-an-a-half with a 390 gasser, 4 spd, and an electric 2 speed axle. Only 8 gears and there was no way to load enough stuff on the truck that it didn't have the gears. We also had some similar 'binders with vacuum axels, which were slow to shift and difficult to time. Now and again I wish I had an electric axel to get going on the freeway with, my Cummins/ 727/3.07 governs out at about 70-75 mph..

 

Does anybody know where a guy could find a brownie box, or a 2 speed rear axle? I really don't have the cash for a gear vendors, and i thought a 3 speed brownie with a lo, a direct, and a overdrive would be cool. that way you could leave it in direct and still have the same gears you had to begin with. Or you have the option to split each gear under and over, effectivly giving you 15 forward gears and 3 reverses. Backing up with a 2wd getrag 3.55 geared truck up a slope with a trailer can be a hair raising experience for you and your getrag!! Thats where the 3 reverses would be nice! just thought i would throw some ideas around. figured its worth a shot!
ez

 

That would be soo cool I would put one on my truck for sure

 

They were fairly common in GM HD trucks. We have a 69 GMC with a 3spd and a 74 6500 with a 4spd intermediate trans. The 74 was always a nice setup. It has a 5spd main trans where 5th is direct (not OD). With that brownie in 1st it barely moves.

On a 4wd you could always put the brownie behind the transfercase and just make sure it is in direct when you use 4wd. That is the way the gearvendors unit works.

The 9spd in our 92 Ford L9000 (behind a 14L cummins) looks so large I just can't fathom it fitting.

 

I will see what i can find. I figured the 9 speed might be a stretch to fit under our floorpans!!
ez

 

I have a GV overdrive on my 90 CTD 4X4. Best mileage yet is 28mpg. I love it!!!

 

I always heard the G360 was rated for 360ftlbs continuous use. Not sure if that is true or not.

 

I would love to have a GV but the price is too much for now, How long have you had the GV? Pretty Durable?

 

that can't be true or I hope it is not, the tranny on My IDI is rated for 420ftlbs and I'm sure these engines don't ever have as much torque as a cummins does.

Also, yes the GV are very pricey but it makes up for the money saved on fuel and if not that, at least You don't have the engine screaming all the time for not having enough gears on highway. I wish some day I can put one on mine.

 

continuous torque rating though. The max torque I am sure it alot higher.

 

I know GV advertises the underdrive but has anyone seen/own it? I would love to get the extra lower gears but it might be cheaper to stuff some ring and pinions in I guess. I was thinking that I read somewhere that 3.73's were as low as you go in the dana 61 and 71's, please correct me if I am wrong, but if I want to keep towing with my '90 i am going to have to do something.

 

You can put in lower than 3.07 gears with a spacer ring.. but they don't recommend it. It makes them much weaker.

Best just to change out alxes with somebody on here who wants the higher gears. Thing is you will be limited to around 65mph with 3.55s and the stock governor.

Could just put on some low profile tires to go the cheap route.
I also see GV units come up on ebay from time to time. There are a few different units, just find the one your truck needs. You will most likely have to purchase the proper adapters new though.

Andy