Gear ratio advice needed.

13bullets

13bullets

Chris
Joined
Dec 14, 2008
Location
Lincolnton
My bronco has a C6 and NP208, and I'll have the rockwells with 44" tsl's put under it eventually. First gear in the C6 is 2.46, 4lo in the 208 is 2.67, and the rockwells of course are 6.72. Final ratio of 44:1, or if you double it for the auto it's 88:1. This is way too high.

What are my options for lowering it? I know I need to swap out my 208, but with what? I need more specific answers than "get a doubler." I don't know as much as I need to about transmissions, transfer cases, and doublers.

The bronco is an 84, with a 302, and as stated a C6 and NP208.

Thanks.
 
Remember reading somewhere that using the auto almost doubled the numbers(take into consideration the torque converter).
 
I double agree. Give it a good whirl before throwing money down the drain. And I'd drive the 208 til the chain stretched. It might be weaker but sometimes things can be overkill. Ford didn't put 208's in their F250's and F350's for punyness. I get tired of hearing how great a 205 is when in light rig situations, you're just throwing 75+ pounds under the belly that could go towards a good skid plate.
But I'd definately go 205 if the 208 fails anytime soon...
 
GubNi said:
Your best bet is to get a 203-205 doubler
Click to expand...

Sounds like this would be the way to go as far as ease of install, don't know about $.

But that would still only get you to 66:1, but 132:1 with TC multiplication. That would be pretty good IMO.
 
My bet is it will be fine. Run it and see what you think. Just build a good skid plate. I have always read that low axle gears take strain off the TC. George ran a Dodge V8 of some sort with a manual tranny behind that with with an NP208 TC and 44" boggers and then 49" IROCS on his old mini-cab truck with rockwells. He never had a problem, and it crawled fine.
 
Just for clarification this will never be street driven. It is for crawling/offroading only.
 
I'd try it out before dropping the coin on anything else. IMO the 203/205 doubler would be the way to go if you need more though. Nice to have the option to run single or doubled low depending on the conditions.
 
still better than my 27:1, well i guess if you double for the auto, its a much better 34:1 :D
 
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