Dana 60 Ratios - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SS Tim · 05-13-2012, 06:50 PM

Yes, its accurate. Page above is from the '71 Data Book, but it pretty much sums up the info for a K20. Now your truck per the '68 Longhorn specs. would have the 4.57 as base standard. With the M20/292 the ratio gets bumped to the 4.10. An optional ratio is not listed for that powertrain either. The 3.54s were only seen in BB trucks. I'd be suprised if yours has factory 3.54s (as built) with a M20/292. You stated "My truck says 3.54." Where does it state this? I'm thinking that your truck has had an axle/ratio swap somewhere along the line. Below is the '68 Powertrain Chart and a Dana axle ID chart.

vectorit · 05-13-2012, 07:55 PM

I am happy to see these gear ratios, since I just picked up a '72 K20 D60 and D44 axle set.

Thanks for the info!

hounddogs! · 05-13-2012, 08:20 PM

My impression was that C10/BBC trucks got a Dana rear rather than the corp unit. The D60 that I put in my C20 had a 3.54 tag on the cover. 46-13 tooth count was called out as well.

**southern parts** · 05-13-2012, 08:22 PM

got 5 dana 60s here. 3 are in bigblock trucks all 3.54 ratio. a 4.10 ratio under a 70 horn with a 307/glide combo. and a 4.56 ratio under a c-20 with a 327/400 combo.

05-13-2012, 06:50 PM	#1
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,507	Re: Dana 60 Ratios Yes, its accurate. Page above is from the '71 Data Book, but it pretty much sums up the info for a K20. Now your truck per the '68 Longhorn specs. would have the 4.57 as base standard. With the M20/292 the ratio gets bumped to the 4.10. An optional ratio is not listed for that powertrain either. The 3.54s were only seen in BB trucks. I'd be suprised if yours has factory 3.54s (as built) with a M20/292. You stated "My truck says 3.54." Where does it state this? I'm thinking that your truck has had an axle/ratio swap somewhere along the line. Below is the '68 Powertrain Chart and a Dana axle ID chart. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

05-13-2012, 07:55 PM	#2
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: Dana 60 Ratios I am happy to see these gear ratios, since I just picked up a '72 K20 D60 and D44 axle set. Thanks for the info! __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU

05-13-2012, 08:20 PM	#3
hounddogs! Restoring it $200 at a time... Join Date: Aug 2008 Location: NE Kansas Posts: 892	Re: Dana 60 Ratios My impression was that C10/BBC trucks got a Dana rear rather than the corp unit. The D60 that I put in my C20 had a 3.54 tag on the cover. 46-13 tooth count was called out as well. __________________ Charter member of the 'Put the dimmer switch back on the damn floor where it belongs' Society '68 5.3L-4 speed LWB C20; grandpa bought it for the farm in '71. Now LS 5.3, rather than 327. DD '09 Pilot Weekender '65 Skylark 300-4V-4 speed Wife's '07 Lexus ES350; 117 actuator motors and I can't see the engine. Son's '04 F250 SuperCab 6.0

05-13-2012, 08:22 PM	#4
southern parts Senior Member Join Date: Apr 2003 Location: Elberton Ga. Posts: 3,475	Re: Dana 60 Ratios got 5 dana 60s here. 3 are in bigblock trucks all 3.54 ratio. a 4.10 ratio under a 70 horn with a 307/glide combo. and a 4.56 ratio under a c-20 with a 327/400 combo.



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