The PERFECT gearing...?
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From: Great NW
The PERFECT gearing...?
The Million Dollar Question:
Considering the HP/Torque/Rev. attributes of the 300 I-6 (+C6 trans), what would be the perfect gear ratio for a truck who runs 33" tires and does some trailer towing (car & camper)?
Considering the HP/Torque/Rev. attributes of the 300 I-6 (+C6 trans), what would be the perfect gear ratio for a truck who runs 33" tires and does some trailer towing (car & camper)?
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Joined: Mar 2005
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This is a good gear chart link 
May have to copy and paste the link to get it to work right... sorry.
www.4wheelparts.com/4wp/assets/!!!---CHARTS---!!!/chart_gear-ratio.htm
May have to copy and paste the link to get it to work right... sorry.
www.4wheelparts.com/4wp/assets/!!!---CHARTS---!!!/chart_gear-ratio.htm
Last edited by dietch; May 5, 2005 at 04:21 PM.
Postmaster
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From: Broken Arrow, OK
The perfect gearing doesn't exist. Everything is a compromise. In your case the best compromise is probably a 3.27 or 3.55 since you tow. If you rarely drive on the highway a 3.73 would probably be OK. The torque converter is like another gear when it is stalled, so you can run a taller gear than you would with a manual trans. Make sure you have enough trans cooler to keep the temps down.
Last edited by Silver Streak; May 5, 2005 at 05:07 PM.
Senior User
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From: Southern Illinois
I would probably say 3.73. My truck used to have 3.55 with C6 and stock tires. With the bigger tires, 3.73 should make the difference between my set up and yours. Maybe 4.10 if you don't do a ton of highway driving.
Senior User
Joined: Dec 2004
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From: centeral Ohio
I dunno though 3.73 or 4.10 are good gears for bigger tires in general but, it's a 3 speed c6....... That would be pulling some mighty hefty rpm's on the highway.
I agree though perfect gears don't exist everything is a comprimise.
I also agree 3.55 or 3.27 sounds even better in my mind for you. Didn't know of a 3.27 gear as an option so i just said 3.00 to a 3.50 lol.
I agree though perfect gears don't exist everything is a comprimise.
I also agree 3.55 or 3.27 sounds even better in my mind for you. Didn't know of a 3.27 gear as an option so i just said 3.00 to a 3.50 lol.
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From: Broken Arrow, OK
I don't think 3.27 was ever offered in the trucks, but it was available in the Mustang. The aftermarket offers almost any gearing combination you can think of.
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From: Sussex County, DE
Originally Posted by Silver Streak
The perfect gearing doesn't exist. Everything is a compromise. In your case the best compromise is probably a 3.27 or 3.55 since you tow. If you rarely drive on the highway a 3.73 would probably be OK. The torque converter is like another gear when it is stalled, so you can run a taller gear than you would with a manual trans. Make sure you have enough trans cooler to keep the temps down.
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Senior User
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From: burley, idaho, usa
i have decided to go with 2.73 gear for daily driving and good fuel econimy overall i really notice that my towing seem sbetter i just use 235 75 15 supersport ht from walmart my fav tire i pulled my boat a 25 footer " damn thing cost more than my house did" up some pretty steep inclines and it seems better than the 3.55 gears i had i have 300 inline efi i also like it cause im not running through my gears so fast and sucking up gas by the way my truck is 2wd and my gears came off a turbo charged thunderchicken they have posi too.
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*drools over TC 3.55 gears*
There's also US Gear for gear splitters. They have a 1.25:1 underdrive as well as a .8:1 overdrive. (the Gear Vendors unit is .78:1, I think) Still expensive, though. ($2,300-2,800+) No idea on quality of either unit. I'm the only one I know who's crazy about alternative gearing options.. or just plain crazy.
Oh well, back to lurking.. another two weeks before it nags me to post again.
There's also US Gear for gear splitters. They have a 1.25:1 underdrive as well as a .8:1 overdrive. (the Gear Vendors unit is .78:1, I think) Still expensive, though. ($2,300-2,800+) No idea on quality of either unit. I'm the only one I know who's crazy about alternative gearing options.. or just plain crazy.
Oh well, back to lurking.. another two weeks before it nags me to post again.
Posting Guru
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From: Sussex County, DE
Originally Posted by FoxBirdman
*drools over TC 3.55 gears*
There's also US Gear for gear splitters. They have a 1.25:1 underdrive as well as a .8:1 overdrive. (the Gear Vendors unit is .78:1, I think) Still expensive, though. ($2,300-2,800+) No idea on quality of either unit. I'm the only one I know who's crazy about alternative gearing options.. or just plain crazy.
Oh well, back to lurking.. another two weeks before it nags me to post again.
There's also US Gear for gear splitters. They have a 1.25:1 underdrive as well as a .8:1 overdrive. (the Gear Vendors unit is .78:1, I think) Still expensive, though. ($2,300-2,800+) No idea on quality of either unit. I'm the only one I know who's crazy about alternative gearing options.. or just plain crazy.
Oh well, back to lurking.. another two weeks before it nags me to post again.
Senior User
Joined: May 2004
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OrdoDraconis:
Your 2.73 gears would be inferior to 3.55's for towing-the motor is turning less rpm's at a given speed, and delivers less torque multiplication to the wheels. It may be that your 2.73's towed okay, but higher numeric ratios (3.55's, 3.73's)have more capability.
Your 2.73 gears would be inferior to 3.55's for towing-the motor is turning less rpm's at a given speed, and delivers less torque multiplication to the wheels. It may be that your 2.73's towed okay, but higher numeric ratios (3.55's, 3.73's)have more capability.
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From: Spokane WA
3.50/3.55 if probably as close to a perfect ratio for a 300/30-33" tire combo as your going to get.
It works good as a everyday driver worktruck gear and you can pull alot of weight with it.
It you tow a heavy trailer ALOT or seriosly plan on larger tires in the future, I'd say 4.10s-4.11s
It works good as a everyday driver worktruck gear and you can pull alot of weight with it.
It you tow a heavy trailer ALOT or seriosly plan on larger tires in the future, I'd say 4.10s-4.11s
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Joined: May 2003
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From: Harrisonburg, VA
I have 95 4wd and it has 3.55's. I got a good deal on some 3.73's for the rear but I also want a zf tranny so I can get rid of the mazda. I think it's better for me to replace the tranny first and see how much that helps then if I still need the gearing I'll get the front set and everything else to go along with it.
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From: Bored town OH
I love my C6, but i wish it had an overdrive.
"The torque converter is like another gear when it is stalled, so you can run a taller gear than you would with a manual trans."
"when it is stalled" -Whats that mean?
"The torque converter is like another gear when it is stalled, so you can run a taller gear than you would with a manual trans."
"when it is stalled" -Whats that mean?
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