brownie problems
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
What you are thinking about doing has got to cost more than a zf5 swap. I dont see a need for any higher gearing than that unless you plan on a cruising speed of 90+mph. If you have too high overall gear ratio you will get worse fuel economy... trying to maintain 65 mph at 1000 rpm will require you to hold it at 3/4+ throttle, unless yours makes a lot more power than mine.
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Senior User
Joined: Jul 2011
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u r correct. on paper the zf5 is the cheapest and most efficient. im using an np435 becuase i have one. i cant find a used zf5 speed in my area and i refuse to pay the 1500 the parts store wants for the tranny, 110 for the flywheel, 110 for my clutch linkage, and a little over 300 for the cluth itself. and ill still have to find a bell housing. thats over 2200 into a truck i bought for 1800. to use the fourspeed, i need the flywheel, a bell housing from the 6.9 idi to the t18, the two wheel drive tail housing, and ofcourse a clutch ill be saving atleast a grand. and i like the idea of grabbing as many gears as possible. once shes back on the road im puutin a two speed rear end in.
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Senior User
Joined: Jul 2011
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i think its built by eaton. it was used in the fifties and sixties behind the smaller inline six. i want to say 292 but im sure im wrong (i think thats a chevy). but if i recall correctly low was 4.11 and high was 3.73. im not sure yet but i dont believe i can shift smoothly with just the tranny. i dont c it spinning fast enough to actually match without shootin me through the cab like a good pinball game. do u have a recomendation? maybe a better idea? im trying to explore all availabe options.
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Senior User
Joined: Jul 2011
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yep. 292 is the chevy im thinkin of the 240 inline six.timken and eaton makes a 2 speed but i understand their the same company. im not sure but im leaning toward a vacuum controled unit. havent been able to verify the axle ratios yet. id prefer to keep the truck as mechanical as possible, it comforting to know that i might limp it home with some bubble gum a paper clip some string and lipstick(i actually fixed my moms radiator with bubalicious and lipstick)lol
Elder User
Joined: Mar 2008
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From: Marianna, Florida USA
The real problem you face trying to switch-end an aux trans is lubrication. I believe the aux tranys have a .83 OD, 2.35 underdrive with something in between. You'll also be dropping some serious coin in yokes and Ujoints to match everything up. As far as the two speed rear end goes, it will probably have a stump-puller gear in it. Good luck with finding one with a low numerical ratio.
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Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
A four spd will work fine with a 2 spd rearend, most of the trucks they came in had four spds. The vacuum shift ones will be antique, the electric shift will be a better alternative.
Like marriana said good luck finding one with usable gear ratios though.
I also don't know of ant that had less than 20 inch wheels either.
All four spd aux trannies that I ever had or seen had an overdrive gear, but are kind of heavy for a pickup.
Like marriana said good luck finding one with usable gear ratios though.
I also don't know of ant that had less than 20 inch wheels either.
All four spd aux trannies that I ever had or seen had an overdrive gear, but are kind of heavy for a pickup.
Postmaster
Joined: Feb 2011
Posts: 3,560
Likes: 1
whats your rear gear ratio(s)? my van has a c6 and 3.5 gears and climbs hills at 80mph. dreaming of a gearvendors OD. what rear gears are you actually playing with so we can better guide you toward a system that will fit your needs...
in theory, a divorced brownie is able to be installed either way (correct and backwards), but i don't know how it will hold up, and i wouldn't see fit to have a gear that you can only think about going into after you pass 90MPH... so tell us your current axle ratio and all that good stuff
in theory, a divorced brownie is able to be installed either way (correct and backwards), but i don't know how it will hold up, and i wouldn't see fit to have a gear that you can only think about going into after you pass 90MPH... so tell us your current axle ratio and all that good stuff
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