i NEED more reduction. been trying to figure the best route to go. i am currently running an amc 360/727/208 4.10 gears in ford 60s. i have a ford 205 on the way. i also have a buddy with cheap($50-75) 203s but they are all 27 or 32 spline input. i need 23. what i have been thinking is find a dodge 203 from behind a 727 adapt to a 32 spline 203 adapt to the 205. lots of reduction and gear options. i have talked to WMS shop about the machining of the shafts and will build my own adapters. i think i have a good idea of the work/time/money all this will take. untill last week i was pretty sure this was what i was going to do. then i saw the thread on mating dual sm465s(i think) and got to thinking about a manual after my auto as a reduction box. couple of searches:flipoff2: and came up with a thread http://www.pirate4x4.com/forum/showthread.php?s=&threadid=33961&highlight=auto+manual+mated
now i am wondering about a stick after my 727. if i can find a stout ford tranny that the 205 will bolt to w/ a factory adapter then only one adapter to make. not real sure of how complicated that adapter would have to be though. more complicated is ok, too complicated is bad. also i dont know jack about fords or their trannys. i have searched but couldnt find what i needed. i have driven my buddys toyota mini with like 200+:1 and its awesome. i have never driven an auto with numbers like what im coming up with(see below). i have heard about not being able to stop with the brakes at a certain low low but not much else. i realize that i wont need stupid low often if ever but it would be cool to have the option and fun to play with. what do you guys think? is all this just stupid and is a simple doubler enough, that was the original plan but the cheap 203s sent me spinning off into a low gear frenzy. oh yeah, i have 120" wheel base so i think it will all fit. for my math i used a hypothetical 6:1 1st in the stick cause im not sure whats available and i used my 4.10s and 5.13 which is what id regear to if i do it at all. id rather spend the time and $ that id spend on axle regear on this instead.
this math is rounded but close enough for me.

tranny2.4 x 208 2.6 x 4.10 = 25.5 me now(sucks ass)
5.13 = 32.0 not enough
2.4 x 2 x 2 x 4.10 = 39.4 203-205 doubler
5.13 = 49.2
2.4 x 2 x 2 x 2 x 4.10 =78.7 203-203-205
5.13 = 98.5
2.4 x 6 x 2 x 4.10 = 118.1 whoa
5.13 = 147.7 retarded low.
also these dont take into account the reduction of the torque converter. any info/comments would be great. if you feel like flaming i think i can take it:) later, zach.
p.s. this is like ten time longer than any thing i have ever posted anywhere.

I'd say go with option two and put low gears into the 205 (do they have low gears for a 205? With an auto, and the torque convertor, those numbers are pretty much double what you wrote down..

And this is all going into what?

88 j-10. not much left of the body. wheel in tellico mostly.

I think the 203-203-205 is a comlete waste of time. If you are gonna mess with something that long, just put an NP435 tranny behind your 727. I'm sure you have counted out the Klune-V because of the $$$, but if you went with the 4:1 model, you would have all the same options as the 203-203-205, but with 1/2 the length, and no adapters. Either way you get 2:1, or 4:1, or 8:1 low range...

L8trs!

203-205 doubler with the lowrange gearset for the 203 box maybe?

yeah, cant afford the klune. i thought about the low range for the 203 but i cant really afford that now either. the cheap 203 just got me thinking. maybe do the 203/205 and the low gears 203 later? also on ford trannies, i found this thread http://www.pirate4x4.com/forum/showthread.php?s=&threadid=19390&highlight=ford+np435+ratios and the ford np435 has the right ratios but it doest say what model trucks they came from. 64-85 what? guessing fullsize. will my for 205 bolt up? factory adapter available etc? just want to explore all the options before i make a decision and kick myself later which happens far too often.

I think you are really underestimating the reduction of the torque converter on this process. From what I have seen on the trail - figure in 2x to the math based on the torque converter alone.

So IMHO - 50:1 is plenty with an auto tranny.

zstrange, is your j10 brown w/o the bed, i think i have seen you around...wanna go wheelin' sometime??

i really dont know how it will behave with drastically lower gearing, never driven a really low auto. i would like to be able to crawl as slow as a toy w/ 200:1 though. thats my only real experience with low low. anyone else?
yeah its brown/no bed. most any sunday im not working on the damn thing im up for wheeling. also been going to tellico pretty regularly. i work in marietta. zstrange74@hotmail.com or stop in at bmw motorcycles of atlanta on cobb pkwy. later, zach.

with an auto and stock gearing you CAN crawl as slow as a yota with 200:1 no probs, its just climbing that takes more oomph,,, like DRM said, 50:1 or anything around that number is plenty with an auto.

Why dont you just use a 203 and divorced 205 with the mirrored out put. or vise versus. You have the wheel base, and it is not hard to do. You can even clock the divorced case if you need to. I have seen this done in short length by having both cases share the ujoint

How about just doing a doubler and regearing your diffs? With an automatic that shouold be low enough.

I agree with the concensus, go with a doubler and you'll be fine. Adding a 435 behind your auto or 203/203/205 would just be silly IMHO.