Need rear end ratio - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dion · 07-09-2002, 06:56 PM

It's a stock Dana 60 3/4 ton 1972, this is on the side C-30255 10 bolt.

**68 Stepside** · 07-09-2002, 08:13 PM

I beleive Dana's were only available in 2 gear ratios in our trucks. I beleive they were 3.54 and 4.11

I'm sure on the 3.54, but not the 4.11

I'm sure someone can help.

ttt

TJ

*Fast68Chevy* · 07-09-2002, 11:00 PM

4.56 was std, 4.10 optional and 3.54 with the 400,
i just got a 67 3/4 ton 4.56 locker dana 60 here recently

to know what you have you iwl have to either find tag on one of the cover bolts, or look on edge of the ring gear inside, or look on glovebox door SPID label and see if any ratio is on it or not. ratio depends on drivetrain, email for more info

Bill72BB · 07-09-2002, 11:10 PM

Dion / Fast

I believe the 72 C20 350v8 came with 4.10 standard and 4.57 optional with the auto trans with coil springs.
With leaf springs 4.10 Dana rear
400BB came standard with 3.54 and 4.10 optional on leaf springs.

Bill

dion · 07-10-2002, 12:16 AM

4.10 Is that pretty good? Speed? Longhornmail, any input?

mikep · 07-10-2002, 12:55 AM

Good for towing and hauling. Bad for gas mileage.

07-09-2002, 06:56 PM	#1
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Need rear end ratio It's a stock Dana 60 3/4 ton 1972, this is on the side C-30255 10 bolt. __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

07-09-2002, 08:13 PM	#2
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,690	I beleive Dana's were only available in 2 gear ratios in our trucks. I beleive they were 3.54 and 4.11 I'm sure on the 3.54, but not the 4.11 I'm sure someone can help. ttt TJ __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

07-09-2002, 11:00 PM	#3
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	4.56 was std, 4.10 optional and 3.54 with the 400, i just got a 67 3/4 ton 4.56 locker dana 60 here recently to know what you have you iwl have to either find tag on one of the cover bolts, or look on edge of the ring gear inside, or look on glovebox door SPID label and see if any ratio is on it or not. ratio depends on drivetrain, email for more info Last edited by Fast68Chevy; 07-09-2002 at 11:04 PM.

07-09-2002, 11:10 PM	#4
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	Dion / Fast I believe the 72 C20 350v8 came with 4.10 standard and 4.57 optional with the auto trans with coil springs. With leaf springs 4.10 Dana rear 400BB came standard with 3.54 and 4.10 optional on leaf springs. Bill __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

07-10-2002, 12:16 AM	#5
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	4.10 Is that pretty good? Speed? Longhornmail, any input? __________________ Burnout Idle 1972Cheyenne 1966/67Stouts Last edited by dion; 07-10-2002 at 12:57 AM.

07-10-2002, 12:55 AM	#6
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Good for towing and hauling. Bad for gas mileage. __________________ No truck :-(



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