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what gears is everyone running I'm trying to decide?

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slider79blazer

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what gears is everyone running I\'m trying to decide?

I have a 79 w/400C.I. 350 turbo auto. w/ 3:73 gears 35-12.50-15 mudders. I'm trying to decide if I want 4:11 or 4:56 gears. it is my daily driver so I want it somewhat good on the roads but I want it to hold me back on the trails also. right now the 3:73s don't slow me down at all I have to ride the brakes down the trail. let me know what you all run and are you happy with your choice?

Thanks

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Re: what gears is everyone running I\'m trying to decide?

I have the 700r4 with 33 inch tires and run 4.56.. It is not my daily driver thou.. And I have the overdrive.. Dan

If it ain't broke.......Don't fix it....
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Re: what gears is everyone running I\'m trying to decide?

I'm running 3.73's with 35's. Not bad but I was running 31's with these gears before. I'm going to 4.11's next summer. Going to a 400cid from the 350cid helped but still miss that extra torque.

78-K5 4"Lift 35"Tires 400SB TH350 NP205
73 Vega 350SB TH350
 
Re: what gears is everyone running I\'m trying to decide?

I went from 33s to 35s runs great on the road and climbs uphill good but coming down I want to crawl but the gears are just to hi I'm thinking on the 4:11s also.

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Re: what gears is everyone running I\'m trying to decide?

with no OD I wouldn't got over 4.10's... I got 35's with 4.10s and at 75 I'm running about 2900 RPM...

<font color=blue> Jeff - may the force be with you</font color=blue>
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Re: what gears is everyone running I\'m trying to decide?

I'm running 3.73's currently, and plan to go with 4.11's when I get my new axles in.

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Re: what gears is everyone running I\'m trying to decide?

I am putting 4.56s in the Jimmy as we speak. It has 350, 700r4 and 35" Goodyear MTRs. I will be putting 4.10 in the burb shortly. It has 350, 700r4, and 35" BFG MT

86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
 
Re: what gears is everyone running I\'m trying to decide?

if I put 4:10s in will that slow me down on trails or will the tranny still pull me down fast?

<font color=blue>whats a 4 letter word for farm wagon?-- ford</font color=blue>
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Re: what gears is everyone running I\'m trying to decide?

I am also debating about what gears to use. I'll probably go with 3.73s, 35s, with a sm465 tranny.

ARQ.

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Re: what gears is everyone running I\'m trying to decide?

I've got 33's with 4.10's and the 700R4

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Re: what gears is everyone running I\'m trying to decide?

I'm running 4:56 with 35" tires and a 700r4
my opinion 3:73 to 4:11 is not going to make a big difference for you, you might want to consider 4:56-you can always go up in tire size
 
Re: what gears is everyone running I\'m trying to decide?

I've got 4:10 with 35 BFG AT's It works alright off road as for the down hill stuff If I'm in 1st gear and Lo-4 It does great.
Eric

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Re: what gears is everyone running I\'m trying to decide?

eric do you have a automatic or standard?

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Re: what gears is everyone running I\'m trying to decide?

If you had the 465 I would say the 465's since you will not have the slip. I just put 4.10 in mine with tall 32's. Should be ok with the 35's I'm tunning 3000 rpm at about 65-70 (speedo is off). BigJBear is running 4.65's with 35's and loves them on the trail but for running down the hwy it is turrning some RPM's. He has a 80 with lock up converter so it's not quite as bad as a 79 would be with no lock up. If you do a lot of hwy I would say go with the 4.10's I('m debating 33's or 35's right now.

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Re: what gears is everyone running I\'m trying to decide?

you know what I haven't done much rock crawling, but I have done a LOT of hill climbing with this thing. I can tell ya what I have absolutely no desire to have a lower geared axles.

now, in my k5 that has a 700r4 I'm running a 31" tire with 4.10's and I absolutely love the combination. I have OD there though.

the sm465 has really low gearing... and I also have the np241 which also has really low gearing. now if you got an np205 I would say you gotta drive the thing a bit off-road before you decide.

my k5 is not a dedicated trail rig because I use it for a lot of daily driving also. I'm not willing to make this thing so trail ready that I don't like the way it drives on the road.

if it were me a touch higher gearing in the t-case would not pose a problem... when I put this thing in low / low it really creaps. I like the combination I got right now.

another thing you gotta consider is if you 35" tires are really 35"... unless you are running an interco tire chances are you really don't have a 35" tire. my 35" tires measure exactly 33" so I'll be going to an interco 36" tire when these are run out. I probably will not change the gear ratio either, but we'll see. depends on how well the new engine will turn those tires.

<font color=blue> Jeff - may the force be with you</font color=blue>
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Re: what gears is everyone running I\'m trying to decide?

leave your gears alone so you can fly on the freeway and add a doubler to crawl off road.
the absolute best combination. wish it had been available when i did my drivetrain the first time and i wouldnt be saddled with 4.88 and 39" tires cruise rpm on the freeway about 2600 rpm 55mph
 
Re: what gears is everyone running I\'m trying to decide?

4.10's and 33's. I couldn't be happier. I used to have a Jeep with 35's and 4.56's and it was a great combo too. Could still cruise OK on the highway with no overdrive. Get the 4.56's or you'll end up kicking yourself later.

'73 K5
Chevy good...Ford bad
 
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