ok so i dont rely know to much about how gear ratios work with bigger tires smaller tires all the lil factors but school me on the ratios lower then 410s and up to rockwells massive 672s i know anything higher then 410s are street whimpy gears but right now i run either 410s or 373s in a gm 14 bolt ff and corp 10 front 35 inch cut boggers 327/350th/203 soon to be upgraded to a 208. but would a higher gear ratio lets say 513s would they give me a real high increase in tire speed? idk just SCHOOL me on gears dunno much bout them ++peace
going from 4.10 to 5.13 will lose wheel speed. the higher the number (5.13) the slower the wheels can spin... it may get the motor to rev faster but rpm to rpm the lower numbers (4.10) will spin the tires faster.. just like changing from a 203 to a 208 the 208 has more gear so the tires spin slower... hope this helps some
Also 5.13 has a smaller pinion head tooth count Than a 4.10 ....so some say it is a weaker gear set
Really depends on what your going to do with it ,(street use.....Boggs....truck pulls ...ect ) I suppose ?
4.10s should be good for 35s. 5.13s would be better for 38s on up to 42s or 44s
don't mean to hi-jack your thread..
how to tell what gears you have in your axle..
I grenaded the pinion carrier on the Cheep (9" Ford).. pinion gear is spent
ring gear shows signs of significant wear..
both the pinion and ring gear have "1940" on them.. (don't believe thats the year they were born.. ==doh )
do I divide the first 2 digits by the second two?? (.475) or the other way around (2.15.. nah!)
to find the ratio ???
divide the number of ring gear teeth by the pinion gear teeht 11 41 is 3.727272727 so u round it to a 3.73
What he said
Quote from: dirtydog on June 13, 2011, 02:58:49 PM
divide the number of ring gear teeth by the pinion gear teeht 11 41 is 3.727272727 so u round it to a 3.73
Quote from: OHEARN.2012 on June 13, 2011, 06:52:13 AM
ok so i dont rely know to much about how gear ratios work with bigger tires smaller tires all the lil factors but school me on the ratios lower then 410s and up to rockwells massive 672s i know anything higher then 410s are street whimpy gears but right now i run either 410s or 373s in a gm 14 bolt ff and corp 10 front 35 inch cut boggers 327/350th/203 soon to be upgraded to a 208. but would a higher gear ratio lets say 513s would they give me a real high increase in tire speed? idk just SCHOOL me on gears dunno much bout them ++peace
a gear ratio is the number of times the driveshaft revolves to one revolution of the axle shaft. so for a 4.10:1 the driveshaft turns 4.1 times to turn the axle 1 time. (this is in a posi or locked state) so a higher ratio means lower wheel speed, it also means higher torque. if your torque at the rear output shaft of the t-case is 300ft-lb (its probably much higher) if you are in 2wd, a 4:10:1 will give you 1230 ft-lb through the axle where as a 3.73:1 will give you 1119ft-lb through the axle. if you are in 4wd the torque from the t-case is cut in half because half is sent up front. With 35" tires Blazin40s is right, 4:10's are plenty for a trail/mud rig. Since a higher ratio results in more torque in the axle shaft and at the wheel, there is a greater chance of snapping an axle when gassing the truck. If you are going from a 203 to a 208 case, you will lower your wheel speed an increase your torque in low range. hi range will remain constant. hope this helps.
is your 10 bolt beefed up with any goodies.. cut boggers even 35's will tear it up if ur not carefull. try to keep front tires on ground, if they happen to leave dnt stay in throttle to much when u come dwn
no just stock i do believe
Boggers will snap those shafts.....may wanna trade someone with tsls 2 of yer tires and run tsl up front and bogger in rear
just dnt cut the fronts, u should be ok. i got a corp 10 front 410 gears new lockouts and calipers shaved to fit 15 in rims was told its beefed up a lil what ever that means if u need it for a spare i want to sell it. i ran it last year with 35 boggers and had no problems. i upgraded to a d60.
i want a 60s and some 40+ tires
but finds are tight
Quote from: OHEARN.2012 on June 13, 2011, 08:38:35 PM
i want a 60s and some 40+ tires
but finds are tight
10 bolt front will be fine, usually when you break up front its cuz you are in it and turn, or have a bad u-joint. if you are really worried about it beef up your u-joints, thats probably what 85 heavymetalbogger is referring to. I know a lot of guys with big power that run 10 bolt fronts without a problem.
I kept breaking my 10 bolt shafts, and I babied it with the 10 bolt. But I was runnin 39.5s........dang u joints snapped and broke both shafts
so im thinking about upgrading to a 39.5 tire this winter wat would you guys suggest for a step up in gears?
4.88s or 5.13s
well with running a 208 wat would match better with its gearing?
how much power u gonna have to turn em? I like my 410's
idk yet decision on an engine is up in air leaning towards smc but if price is good on a running bbc prolly go with it.
still got that axle?
yes sir
Id say if its a straight bogger, go 5.13s, I run 39.5 and 4.10s with a 208 and about 400hp......it does good, but I would be happier with taller gears. I'm going 5.38s when I do mine.......but I'm gonna go to 44s prob
str8 up bogger nuin else maybe pull some trees out lmao
Quote from: Blazin40s on June 13, 2011, 08:27:19 PM
Boggers will snap those shafts.....may wanna trade someone with tsls 2 of yer tires and run tsl up front and bogger in rear
I ran 44 bogs on the jeep with a 10 bolt open diff and never had a problem... 5:38 gears with 600hp +
If you plan on running 40 with a 208 you should go with 5:13's....your tranny has more than one forward gear right? Plus if you go with a 5:13's you could run a bigger tires later without changing gears again.
If you change the gears before you change the case you could run 35s...if you change the gears and case you will NOT have a lot of tire speed.....
would i be better off with a 205?
203 and 205 have the same gear ratio which is 1.96:1 and the 208 is 2.73:1
205 are tuff but harder to find
208 is 1/4 the weight, plentiful, and has a much better gearing....
I think your best setup for your truck is as follows
35" tires, 5:13s with 203 ( since you have mentioned that funds are tight
40" 5:13's and 208 ( wont need high hp to run this setup and then you could run bigger tires up to 44"
All this is IMO...that is what i would do if i was in your shoes....
Here is a link with 44 bogs, 208 and 5:38s and stock motor ;) !
http://www.youtube.com/watch?v=8LvM-vaC9Kc# (http://www.youtube.com/watch?v=8LvM-vaC9Kc#)
hmm john im liking that setup im building it over this winter so i just have to budget for it
got captain crunch/crunch berries?jk.. i dnt knw that i need anything, got any guns? 100 buks takes it, well worth it.
Quote from: OHEARN.2012 on July 28, 2011, 02:19:29 AM
Quote from: 85cHeavyMetalBogger on July 27, 2011, 10:09:25 PM
Quote from: OHEARN.2012 on July 27, 2011, 09:20:42 PM
Quote from: 85cHeavyMetalBogger on July 27, 2011, 08:36:38 PM
yes sir
looking for any trades?
i dnt knw, what u got
i got some canned goods and cereal lmao watcha need
u dont know how bad i want it man that is a steal and i need one with brakes and urs has brakes
new brakes, calipers, warn lockouts.. calipers shaved if ur runnin 15 in rims
u got 100 buks its yours..
u rely shud save it for me man id buy it here in a month or 2
cant pass on a sell if you dnt end up getn it u knw
we may missing a key question here; what is best tire speed or torque?
Quote from: 390JOE on July 29, 2011, 08:51:26 AM
we may missing a key question here; what is best tire speed or torque?
wheel speed is king!!! keep them tires clean!! the faster the wheels spin the faster you go!!!
thanks for the lesson... lots of good info here.. I am getting ready to change out my 1/2 ton to 3/4 ton and was just ondering what gear ratios to go with.. Thanks
MudIce
BackYard Mudders!
Quote from: MuddIce on August 10, 2011, 11:45:30 PM
thanks for the lesson... lots of good info here.. I am getting ready to change out my 1/2 ton to 3/4 ton and was just ondering what gear ratios to go with.. Thanks
MudIce
BackYard Mudders!
wat kinda tires u running?