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Gearing for 35's

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Old Nov 7, 2007 | 05:05 AM
  #1  
91Yota4x4's Avatar
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From: Mt. Washington, Ky
Gearing for 35's

i have a 91 toyota standard cab and im about to get a lift for my truck and im wantin 35 , i rebuildt my motor and it has 33's stock and it turns them fine so im thinkin i have 410's but i do not know i need some help
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Old Nov 7, 2007 | 05:09 AM
  #2  
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From: Arvada, Colorado
Here is the math.

(new tire size/old tire size)*old gear ratio= new gear ratio.

FWIW, you likely have 4.10's stock.
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Old Nov 7, 2007 | 05:29 AM
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From: Longmont, CO
Manual - 5.29

Auto - 5.71 (and it's still gonna be undergeared in overdrive)
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Old Nov 7, 2007 | 05:37 AM
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From: NW Ark on wooded ten acres...Ozarks at large!
Originally Posted by 91Yota4x4
i have a 91 toyota standard cab and im about to get a lift for my truck and im wantin 35 , i rebuildt my motor and it has 33's stock and it turns them fine so im thinkin i have 410's but i do not know i need some help
33's wouldn't be stock, though. No Toyota truck or SUV came with them. 31's would be that. Even so, two inches makes a big difference. Or, more correctly....one inch.
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Old Nov 7, 2007 | 06:25 AM
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His truck didn't come with 33's thats just what he is running the STOCK truck with.
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Old Nov 7, 2007 | 09:00 AM
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Originally Posted by tc
Manual - 5.29

Auto - 5.71 (and it's still gonna be undergeared in overdrive)
I have 529's with 35's and a 3.0 with an automatic and i do fine.
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Old Nov 7, 2007 | 09:13 AM
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From: NW Ark on wooded ten acres...Ozarks at large!
Yes....I see. Hmmm....grammar...punctuation....would've helped.
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Old Nov 7, 2007 | 10:00 AM
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I'm running the 5.29's with 35's as well on an auto. It does the job that I need it to. I do see what others means about hills but its not that bad. I had 4.88(stock) when I ran my 33's. 5.71's don't hurt but 5.29's will get the job done.
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Old Nov 7, 2007 | 11:50 AM
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From: Longmont, CO
Originally Posted by run4her
I have 529's with 35's and a 3.0 with an automatic and i do fine.
[soliloquy]Keep in mind all opinions below are at altitude, which exaggerates any gearing/power issues.[/soliloquy]

You've obviously not driven a properly geared one to appreciate the difference.

Molly's truck is an auto with a minty fresh V6 motor and 5.71's and it SUCKS compared to my truck (33's, manual, 4.88's). It won't hold the overdrive on anything remotely uphill or into the wind at less than 85 MPH (and it's too damn scary to drive her truck that fast)
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Old Nov 7, 2007 | 11:55 AM
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From: Corrales, NM
Originally Posted by tc
[soliloquy]Keep in mind all opinions below are at altitude, which exaggerates any gearing/power issues.[/soliloquy]

You've obviously not driven a properly geared one to appreciate the difference.

Molly's truck is an auto with a minty fresh V6 motor and 5.71's and it SUCKS compared to my truck (33's, manual, 4.88's). It won't hold the overdrive on anything remotely uphill or into the wind at less than 85 miles per hour (and it's too damn scary to drive her truck that fast)
So is regearing with a 3.0 and auto just an exercise in futility? I'm just asking because I was considering it too. Or is money better spent doing an auto-to-manual swap and THEN regear?

Andy
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Old Nov 7, 2007 | 12:03 PM
  #11  
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Depends on how you use the truck. The issue is not first, but the top gear (5th or overdrive). There is not really an issue of longevity/strength between the two, but an additional cooler is recommended for the auto.

If you are on the highway alot and want to be able to use the OD, IMHO you should gear the axles two steps lower than a manual tranny (stock is one step, and I think the autos are undergeared from the factory). Since 5.71's are the lowest you can go in a Toyota axle, that kinda limits you to 33's. If you want to go bigger than that, I would HIGHLY recommend a manual tranny swap.

If this is a trail only truck, or only sees city driving and will never use the overdrive, you can gear it the same or even one step HIGHER than a manual since the torque converter helps by increasing the torque at low speeds.

I should state that Molly's truck with 35's auto and 5.71's had SIGNIFICANT tranny temp issues on the highway because of not being able to hold the OD lockup until she installed a tranny cooler. If you have an auto and even think you MIGHT be undergeared, start shopping for a tranny cooler!
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Old Nov 7, 2007 | 12:25 PM
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From: Corrales, NM
Ah, I see. Well, (sorry to hijack the thread) I'm 80% city, 10% trail and 10% highway most of the year, but I do like my road trips. With my 3.0, auto and 32x11.50s I cannot hold OD up any inclines with stock gearing, and I want to go to at least 33s and more probably 35s within the next year. Seems worth the cost of another tranny cooler and 5.71s to extend drivetrain life.

Thanks TC.

Andy
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Old Nov 7, 2007 | 12:50 PM
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From: B.C
haha as far as i know i have stock gears and i run 35 X 12.5 and i havnt had a problem going up a hill yet even rock crawling it does great. My only problem is when i have 5 people in my runner then it suffers.
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Old Nov 7, 2007 | 02:44 PM
  #14  
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From: Longmont, CO
It probably NEVER goes into overdrive so you don't notice it as much. What RPM are you at for 70 MPH?

(For comparison, my truck is at 3000, Molly's is at 2250 if you can ever get it in OD and the torque converter locked up long enough to read it)
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Old Nov 7, 2007 | 06:27 PM
  #15  
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From: Clear Lake City, TX
Originally Posted by run4her
I have 529's with 35's and a 3.0 with an automatic and i do fine.
Contrary to Toy's believe I think I hang ok...

Originally Posted by spaceycayce
I'm running the 5.29's with 35's as well on an auto. It does the job that I need it to. I do see what others means about hills but its not that bad. I had 4.88(stock) when I ran my 33's. 5.71's don't hurt but 5.29's will get the job done.
At least do 5.29's 5/71's are better..
Here is the reasoning,, http://www.gearinstalls.com/410suck.htm

Originally Posted by tc
[soliloquy]Keep in mind all opinions below are at altitude, which exaggerates any gearing/power issues.[/soliloquy]

You've obviously not driven a properly geared one to appreciate the difference.

Molly's truck is an auto with a minty fresh V6 motor and 5.71's and it SUCKS compared to my truck (33's, manual, 4.88's). It won't hold the overdrive on anything remotely uphill or into the wind at less than 85 miles per hour (and it's too damn scary to drive her truck that fast)
What you talking about Willi's?

Originally Posted by tc
Depends on how you use the truck. The issue is not first, but the top gear (5th or overdrive). There is not really an issue of longevity/strength between the two, but an additional cooler is recommended for the auto.

If you are on the highway a lot and want to be able to use the OD, IMHO you should gear the axles two steps lower than a manual tranny (stock is one step, and I think the autos are under-geared from the factory). Since 5.71's are the lowest you can go in a Toyota axle, that kinda limits you to 33's. If you want to go bigger than that, I would HIGHLY recommend a manual tyranny swap.

If this is a trail only truck, or only sees city driving and will never use the overdrive, you can gear it the same or even one step HIGHER than a manual since the torque converter helps by increasing the torque at low speeds.

I should state that Molly's truck with 35's auto and 5.71's had SIGNIFICANT tyranny temp issues on the highway because of not being able to hold the OD lockup until she installed a tyranny cooler. If you have an auto and even think you MIGHT be under-geared, start shopping for a tranny cooler!
Tranny cooler is ESSENTIAL for 5.79's... Ask me how I know..

Originally Posted by tc
It probably NEVER goes into overdrive so you don't notice it as much. What RPM are you at for 70 MPH?

(For comparison, my truck is at 3000, Molly's is at 2250 if you can ever get it in OD and the torque converter locked up long enough to read it)
I gotta go beat Troy now... LOL! Hope that helps!
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Old Nov 9, 2007 | 01:57 PM
  #16  
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I'm running 5.29 5spd trans with 35's. I think I'm a little under geared. my speedometer is reading faster (~10%) and my rpm is higher.
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