Need some info, kinda new to a lot of this - The 1947 - Present Chevrolet & GMC Truck Message Board Network

byates2 · 03-04-2007, 03:14 AM

I'm pretty new to all this, this is my very first project truck and i was wondering what is the gear ratio and what do i need to do when i get a new tranny in there as regards to the gear ratio and getting that set up with the differential and drive shaft? i'm lookin at either a TH350 Or TH400 for my 67 c10, i'm getting a new 350 in there it has a 283 curently.

krue · 03-04-2007, 04:43 AM

You'll have to figure out what ratio you have. If you just want to cruise at or around hiway speeds a 3.08 gear is a good choice. If you want to use an o/d tranny a 3.73 may be a better choice.

PanelDeland · 03-04-2007, 11:21 AM

If you're a swapping tranny's anyway I would suggest you look at the 700R4 to get OD.It will give you a little better milage with the same gearing or allow you to run the 3:73's and still cruise hiway.

03-04-2007, 03:14 AM	#1
byates2 Registered User Join Date: Feb 2007 Location: Acton Posts: 158	Need some info, kinda new to a lot of this I'm pretty new to all this, this is my very first project truck and i was wondering what is the gear ratio and what do i need to do when i get a new tranny in there as regards to the gear ratio and getting that set up with the differential and drive shaft? i'm lookin at either a TH350 Or TH400 for my 67 c10, i'm getting a new 350 in there it has a 283 curently. __________________ 1967 C10 Long Bed, Soon to have a 350 1997 Chevy 2500 454 BB

03-04-2007, 04:43 AM	#2
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Need some info, kinda new to a lot of this You'll have to figure out what ratio you have. If you just want to cruise at or around hiway speeds a 3.08 gear is a good choice. If you want to use an o/d tranny a 3.73 may be a better choice. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

03-04-2007, 11:21 AM	#3
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Need some info, kinda new to a lot of this If you're a swapping tranny's anyway I would suggest you look at the 700R4 to get OD.It will give you a little better milage with the same gearing or allow you to run the 3:73's and still cruise hiway. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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