Best crawl ratio using 4.10's 700r4, and single transfer

[85scottsdale]

Best crawl ratio using 4.10\'s 700r4, and single transfer

Trying to help a guy out here find the best crawl ratio possible using an auto tranny, 4.10 gears, and a single transfer case. He would like to get front and rear wheel drive in low range but doesn't have too, only way I know to do that is with a twin stick 205 but it has too low a low range. I figured the 700r4 would be best since it has lowest first gear, and he may be willing to go manual but wants to get an auto.

 

[big83chevy4x4]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

you want the lowest? or what
203......2:1
205...1.96:1
208...2.61:1
241...2.71:1

you can get 2wd low by not locking the hubs /forums/images/graemlins/grin.gif

 

[85scottsdale]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

This is actually going to be in a Yota FJ40, and gears are a pain to change, so thats why the 4.10 gears and their expensive. I believe he is running 38.5" SXs and has a 305 in it right now. But his wheelbase is really too short for a doubler.

 

[Bullet]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

With a 700, 205 and 4.10 gears his crawl ratio would be 24.5... not that good. IIRC, Twin sticking the 205 will not change the low range, all you do is grind the shift rail to get front wheel drive. I don't even think you can get aftermarket gears to get a higher low range for a 205 yet /forums/images/graemlins/dunno.gif

Why not consider a Klune V underdrive? If I were to ever consider getting a better crawl ration than I already have, I see the most sensible way to go besides a doubler /forums/images/graemlins/smirk.gif With my set up of 700/Klune/241/5.13s=116 crawl ratio, with an auto /forums/images/graemlins/peace.gif

 

[Bullet]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

Even more of a reason to go to a Klune its only 6 inches, IIRC

 

[dhdescender]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

[ QUOTE ]
I don't even think you can get aftermarket gears to get a higher low range for a 205 yet /forums/images/graemlins/dunno.gif

[/ QUOTE ]

I've been working on it, but its a major back-burner project. There isn't much room inside the 205, and the only way I can see doing it, is bucking off the bottom and making a bolt-on "pan", otherwise the gears wont be able to install b/c of the proximity of the shift rails. Essentially it CAN be done, but I'm not sure many would be willing to dish out what would be needed for a 3:1 (or close to) kit. I'm going to hack one up, and use welded gears just to prove it is possible.

 

[85scottsdale]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

His rear shaft is only 23" as it right now with a SM465 and 205, and having a 2-Low is a must.

He does not want to use a Klune V or doubler or anything like that right now and is looking for cheap.

I think a 700r4 and Dana300 is his best option right now.

Do they make a kit so you can run 2-Low with a NP241?

 

[Bullet]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

Very interesting /forums/images/graemlins/thinking.gif Keep up the good work /forums/images/graemlins/waytogo.gif

 

[Bullet]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

Well, you can swap an SM 420, which is a popular swap for Fj40 due to thier overall lenght and driveshaft issues. There is a new slip yoke eliminator kit out there that makes the overall length of the NP241 the same as a 205. Which I might do this summer.

I am confused why can't you put the 241 in 4Lo and not lock the hubs, or are you talking about 2Lo in the front wheel drive option? /forums/images/graemlins/dunno.gif IN that sense, you can't run front wheel drive into a 241 unless if you want to go through the hassle of swaping hubs onto your rear axle... /forums/images/graemlins/smirk.gif

 

[85scottsdale]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

Well, here is what he posted on our North carolina board.

"OK, this is purely the "what-if" phase, but.. assuming a small-block chevy v8... currently have a SM465, factory adapter, NP205.. 10 spline stuff. Rear driveshaft is kinda short at 23", so that's an issue...

The end result must have - manual tranny - more than 20:1 reduction; auto tranny - more than 9:1 (not including torque convertor), and MUST have the ability for 2LO (RWD, FWD would be nice, but not necessary)

I would really like an auto tranny, and clockable is a REAL big plus

Some of the options I have thought of -

SM465 to marlin Toybox adapter, to toy t-case w/ 4.7 gears - about $1150, with the 2LO sticks. (case - $150, adapter $369, 4.7 gears $350, twin stick $200) Not the strongest, and NOT clockable. 31:1 reduction

TH350 to marlin toybox.. same price... I have access to a TH350 that I can swap for my 465... 13:1

SM465 to OTT adapter... clockable... ~$1400 (case - $150, adapter $465, 4.7 gears $400, 23 spline input $150, twin stick $200) Keeps the PITA coupling sleeve, not the strongest.. 31:1 reduction

I'm mostly unfamiliar with the Dana 300 kits, so enlighten me??"

 

[4X4HIGH]

Re: Best crawl ratio using 4.10\'s 700r4, and single transfer

As previously mentioned, the 700R4/241/4.10 will get you 34.12:1 crawl ratio before convertor multiplication. You can buy a kit to make the 241 a fixed yoke and also making it the same length as a 205. As far as 2WD low, unlock the front hubs as mentioned. /forums/images/graemlins/thumb.gif