Torque converter and 2.73 gears question - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tom · 08-26-2017, 06:03 PM

Stock convertor. With the low gears out back you'd just be sitting in the stall zone building heat with a high stall convertor around town.

cottonme173 · 08-28-2017, 10:55 AM

Great information from everyone! I really appreciate all of the help and input. I may start a new build thread with pictures, this is going to be a fun build. Converting a 78 from Diesel to Gas :-). Thanks again for the help!

cottonme173 · 12-01-2017, 07:08 PM

Well I haven't gotten the truck driving yet, but working on it! I did take the diff cover off because I wanted to for sure know the ratio. 47 Ring 17 Pinion = 2.76 Gears. I can not find much on these gears anywhere. Did GM not make them long?

KQQL IT · 12-02-2017, 04:02 AM

2.73 and a 28 inch tall tire is an awesome combo with any torque.

Any stall would be pointless with that gear.

cadillac_al · 12-02-2017, 09:50 AM

I'm sure the engine has enough torque to handle any converter. My current Caddy is running 2.30 gears with a little 350 and it doesn't hold up traffic. When I used to run a C10 with a lightly warmed up 350 I could not get any traction with a th400 and stock converter.

Oh yeah, I forgot what gears that C10 had. I thought it was High sped like 2.73's or maybe 3.08's.

08-26-2017, 06:03 PM	#26
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	Re: Torque converter and 2.73 gears question Stock convertor. With the low gears out back you'd just be sitting in the stall zone building heat with a high stall convertor around town. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

08-28-2017, 10:55 AM	#27
cottonme173 Registered User Join Date: Nov 2013 Location: Sherwod, Or Posts: 77	Re: Torque converter and 2.73 gears question Great information from everyone! I really appreciate all of the help and input. I may start a new build thread with pictures, this is going to be a fun build. Converting a 78 from Diesel to Gas :-). Thanks again for the help!

12-01-2017, 07:08 PM	#28
cottonme173 Registered User Join Date: Nov 2013 Location: Sherwod, Or Posts: 77	Re: Torque converter and 2.73 gears question Well I haven't gotten the truck driving yet, but working on it! I did take the diff cover off because I wanted to for sure know the ratio. 47 Ring 17 Pinion = 2.76 Gears. I can not find much on these gears anywhere. Did GM not make them long?

12-02-2017, 04:02 AM	#29
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,260	Re: Torque converter and 2.73 gears question 2.73 and a 28 inch tall tire is an awesome combo with any torque. Any stall would be pointless with that gear. __________________ " That didnt make it any newer " " Dont antique the equipment "

12-02-2017, 09:50 AM	#30
cadillac_al Registered User Join Date: Oct 2013 Location: Maine Posts: 2,376	Re: Torque converter and 2.73 gears question I'm sure the engine has enough torque to handle any converter. My current Caddy is running 2.30 gears with a little 350 and it doesn't hold up traffic. When I used to run a C10 with a lightly warmed up 350 I could not get any traction with a th400 and stock converter. Oh yeah, I forgot what gears that C10 had. I thought it was High sped like 2.73's or maybe 3.08's. __________________ 76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 Last edited by cadillac_al; 12-02-2017 at 10:25 AM.

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