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10-15-2003, 08:21 PM
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#1 |
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registered IWATA user
Join Date: Feb 2002
Location: Baton Rouge
Posts: 4,483
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dana 60 questions (gear ratio, posi, etc)
i have a dana 60 on my 72 3/4 ton, somebody wants to buy it, its 8 lug. how do i tell what ratio it is and if its posi or not? people ahve told me tricks about jacking up one tire and turing it, etc etc, i wanna know what a posi rearend looks like compared to a open. do i have to count teeth or is there markings on it that say the ratio. i can take cover off and post pics tomorrow. thanks, sean
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-'63 Ford Fairlane 500 coupe, v8, auto, faded and rusty. awaiting built roller 302 and some flat black -'99 Honda Prelude. vtech/5spd. no pipe, no intake, bone stock. awaiting new top end. -01 GMC Yukon SLT 5.3 dented and scratched with a noisy tranny. Take off that Von Dutch hat before i stab you with a 000 Mack. |
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10-15-2003, 08:40 PM
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#2 |
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Join Date: Dec 1999
Location: Eastern - Manitoba Canada, Winnipeg
Posts: 4,369
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The posi is called a power-lok in a dana of this vintage... would look like this inside the diff. Whwen lookign at the crown gear you will see numbers stamped on it... for example theres the typical part number and then say... a 41-10 doing the division math you know its 4.10 ratio. 41 divide by 10.
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Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife. |
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10-16-2003, 05:13 AM
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#3 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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If you do decide to jack-up one tire and turn it and count the times the pinion turns and it wont, it's either seized up or you have a traction aid in there. On my truck w/ powr-loc I can't rotate one tire while the other is on the ground.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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10-16-2003, 12:39 PM
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#4 |
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Broke
Join Date: Aug 2001
Location: West Plains,MO
Posts: 385
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The easiest way to tell the gear ratio is to pull the cover and count the teeth on both the ring gear and the pinion gear. Then divide the number on the ring gear by the number on the pinion and this is your ratio. (e.g. 41 teeth on ring gear, 11 teeth on pinion=3.73 gear ratio.) As far as the posi goes jack up both sides and spin one wheel, if they both move you've got a locker.
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