What were stock gears in 71' with A.T. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70c10 · 07-14-2002, 10:44 PM

What were the stock gears in 71' with Automatic tranny's?. My dad is looking at a truck with a 307 motor for sale and I was curious. It's an all original Custom/10 fleetside LWB. Thanks

Super Chevy · 07-14-2002, 10:47 PM

Most Likly 3.07 12 bolt 3 series carrier

Longhorn Man · 07-14-2002, 10:55 PM

Acording to my GM restoration catalog, if it is a 307 V-8, and has a Power Glide, then a 3.73 gear is standasd, with a 4.11 optional.
If it is a Turbo Hydromatic, then a 3.07 is standard, with either a 3.73, or a 4.11 optional.

Bamm · 07-14-2002, 11:19 PM

Anybody got a 4.11 leaf spring rear, 5-lug????????....JB

70c10 · 07-15-2002, 07:59 AM

It does have a 350 turbo tranny. Will that rear from a 71' 5 lug swap directly to a 70' 6 lug?.

Longhorn Man · 07-15-2002, 06:48 PM

Yup.

07-14-2002, 10:44 PM	#1
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	What were stock gears in 71' with A.T. What were the stock gears in 71' with Automatic tranny's?. My dad is looking at a truck with a 307 motor for sale and I was curious. It's an all original Custom/10 fleetside LWB. Thanks __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

07-14-2002, 11:19 PM	#4
Bamm Cowboy Fan for Life!!!!!! Join Date: Apr 2002 Location: Amelia, Virginia Posts: 2,921	Anybody got a 4.11 leaf spring rear, 5-lug????????....JB __________________ 1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS

07-15-2002, 07:59 AM	#5
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	It does have a 350 turbo tranny. Will that rear from a 71' 5 lug swap directly to a 70' 6 lug?. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

07-14-2002, 10:47 PM	#2
Super Chevy Registered User Join Date: Feb 2001 Location: Ohio Posts: 1,025	Most Likly 3.07 12 bolt 3 series carrier

07-14-2002, 10:55 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Acording to my GM restoration catalog, if it is a 307 V-8, and has a Power Glide, then a 3.73 gear is standasd, with a 4.11 optional. If it is a Turbo Hydromatic, then a 3.07 is standard, with either a 3.73, or a 4.11 optional.

07-15-2002, 06:48 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Yup.



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