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  #1  
Old 01-30-2014, 01:58 PM
vacustode03 vacustode03 is offline
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Default my gear ratio doesn't make sense

I have a 92 ranger, 4 cyl, 4wd, 5 speed that supposedly has 4:10 gear ratio. But it seems like it is geared higher than that. The sticker in the door says axle code 87 which means 7.5 in rear end and 4:10 gears. But I can travel down the interstate at 70mph at 2000 rpms. So does this make sense? The truck feels sluggish as well like it should be geared higher.
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Old 01-30-2014, 02:06 PM
ragedbob ragedbob is offline
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Default Re: my gear ratio doesn't make sense

Could be swapped axle 4 cylinder rangers are slow or could have the door off anoth truck you never know
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Old 01-30-2014, 02:15 PM
vacustode03 vacustode03 is offline
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Could be a different door sticker but the door is original.
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Old 01-30-2014, 05:46 PM
ragedbob ragedbob is offline
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Default Re: my gear ratio doesn't make sense

Very improbable tho
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Old 01-30-2014, 06:25 PM
vacustode03 vacustode03 is offline
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As far as I know all 2nd gen 4 cylinders came with 4:10 gear ratios.
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Old 02-01-2014, 03:39 PM
pelplouffe pelplouffe is offline
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Default Re: my gear ratio doesn't make sense

Mine is a 94 and got a 3.73 under it, at 100 (60 mile an hours) if goes just over the 2000rpm mark when i'm in 5 without any weight..
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Old 02-01-2014, 04:09 PM
vacustode03 vacustode03 is offline
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My speedo doesn't even show 100mph. It only goes to 85. Can you tell me what your rpms are if your going 45mph in 4th gear?
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Old 02-01-2014, 04:17 PM
johnday johnday is offline
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Default Re: my gear ratio doesn't make sense

He gave it to you as 100, he means kilometres per mile, which translates into 62 miles per hour, but 60 mph is close enough.
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Old 02-01-2014, 04:32 PM
vacustode03 vacustode03 is offline
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Ok I was having a hard time understanding that
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Old 02-02-2014, 01:36 AM
Fx4wannabe01 Fx4wannabe01 is offline
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Default Re: my gear ratio doesn't make sense

What size tires? It does seem abnormally low for a 4cyl.


Chock the front wheels, jack the back of the truck up, put her in neutral with parking brake off. Do the old trick of counting how many times the the driveshaft rotates for every one rotation of the tire. If the driveshaft (ie pinion gear) rotates just over 4 times for one rotation of the tire (ie ring gear), you have approx 4.10.


Your last comment about it feeling sluggish and needing a higher gear ratio.....what you may be trying to say is you need a lower gear ratio (numerically higher). That and it's got 100hp on a really good day. lol.
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Old 02-02-2014, 05:21 AM
vacustode03 vacustode03 is offline
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Yes, I'm sorry. I worded it wrong but you understood what I was saying. I meant it feels like it should be geared lower. I might have to do what you said and try that old trick. It may be my only true way to find out what is really under my truck.

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Quote:
Originally Posted by Fx4wannabe01 View Post
What size tires? It does seem abnormally low for a 4cyl.
what do you mean by it seems low? Do you mean my rpms should be higher at 70mph than 2 grand? Tire size is probably stock. If they were bigger it would be even more sluggish.
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Old 02-02-2014, 06:54 AM
Redneckstone Redneckstone is offline
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Default Re: my gear ratio doesn't make sense

Yes should be in the 2,400.

You have a Lima 2.3l they are dogs. I hated mine. Never got good mpg nor could it get out of its own way.
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Old 02-02-2014, 07:12 AM
vacustode03 vacustode03 is offline
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Well I'm in the middle of a 4.0 rebuild to swap in but regardless, I want a true 4:10 gear ratio with whatever engine I have in it.
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Old 02-02-2014, 08:54 AM
cdawall cdawall is offline
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Default Re: my gear ratio doesn't make sense

Pop the cover and count the pinion vs ring if it isnt stamped.
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Old 02-02-2014, 08:58 AM
casey.mikl casey.mikl is offline
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Quote:
Originally Posted by Redneckstone View Post
Yes should be in the 2,400. You have a Lima 2.3l they are dogs. I hated mine. Never got good mpg nor could it get out of its own way.
This my Lima has 4.10 and 31 and at 70 it's right around 2400 rpm. Gas milage? What is gas milage? Lol that's why I'm swapping in 5.0
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