Who's got the lowest rear gears!? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

'70 C/10 SS500 · 07-11-2003, 04:25 PM

Who has the lowest gears guys? Post your gears and motor/tranny info and see how you fall in with everyone else. Low and lowered would be even better! (Was Jim Carey in that one?)

'70 C/10 292 I6, TH-350, Richmond 4.88s

very soon to be 500 Caddy motor, M-21, 4.88s!!!!

68CST327 · 07-11-2003, 05:42 PM

Hmm, I know I don't have 4.88's! That's wicked! I know I have either something like 4.10's or 4.56's, I'm not sure. 327 with a TH-400. I'm looking into swapping a TH-350 trans in there.

Dean23 · 07-11-2003, 06:02 PM

350/350 COMBO 3.73 MAYBE FGONNA PUT IN 4.10

Nova_Cobra64 · 07-11-2003, 06:16 PM

I plan to put lower gears (have 3.08 right now) in my 69 as soon as I get my Saturn SC1 (gas miler), but don't know what direction to take as far as the ratio to go with.

So anybody with 3.73 or 4.10's, post your opinion of weather you like them or not.

72moneypit · 07-11-2003, 06:22 PM

Well, I'm pretty sure I have 4.11's and I hate them. I think 3.73's would be best for me... a nice mix between torque, RPMs and gas mileage.

Lucky59 · 07-11-2003, 06:36 PM

I have 4:10's right now in my truck, I figured they were like 3:73's until I acutally tested it out... My setup is 350/TH400.

Lucky

Longhorn Man · 07-11-2003, 06:36 PM

3.07 in one, and 4.56 in the other.

lukecp · 07-11-2003, 07:55 PM

3.07 and they suck

. At least i can cruise 75 @3000 RPM, and i can go over 80 in 2nd gear

.

ABHaulR · 07-11-2003, 08:04 PM

right now stock 350/350 4:10
soon to be built 350/700r4 5:13

crazy longhorn · 07-11-2003, 08:06 PM

I have 4.10s, & like them! The old longhorn will cruise 80mph @ 3000 on the 4.10s......in 6th gear

crazyL

shortbed70 · 07-11-2003, 10:56 PM

355/350th with 25.5 tall tire and used to have 4.56 but that rear is blown up see signiture. Didnt like the highway

Duallie · 07-12-2003, 04:51 AM

I've got a 67 parts C20 with 5.13:1. Detroit, too! For some strange reason it had a SpeedAlert speedometer. I found it set on 45 mph....

Project1970 · 07-12-2003, 10:41 AM

3.73's...originally with a 3-speed, then a THM400, and now a 700R4. Oh, and 28" tires. Without OD, it was more or less a town-cruiser...75+ for extended periods of time was a bit much. With OD, though...80-85 at a bit over 2500RPM is just fine.

BraveDave · 07-12-2003, 11:08 AM

I recently installed 9:18 gears. I am going to help move the Astrodome about 6 feet to the left!

bigjimzlll · 07-12-2003, 11:29 AM

lol...dave...i have 3.73s..bidding on 4.56s on ebay now

Southpa · 07-12-2003, 02:31 PM

Is there any gearing between 3.07 and 3.73? Got 3.07 right now but would like to find something more mid-range.

krazy_texan · 07-12-2003, 03:14 PM

350/350 4:10gears i hate it as i drive the truck about 300 miles a week

71sub · 07-12-2003, 03:49 PM

I've got a 350 / 700r4 setup with a Ford 9" posi 3.50 rear end and 31" tires --------- cruises pretty nice. Drive it around 100 miles every day.

crazy longhorn · 07-12-2003, 03:50 PM

Quote:

Originally posted by Southpa
Is there any gearing between 3.07 and 3.73? Got 3.07 right now but would like to find something more mid-range.

Southpa, look at the 73 up trucks & you will find a 3.40 gear in some. It wont be a bolt in, but you can weld

There are a couple vendors that sell a weld in kit to install the later rear diff in the 67-72s. Good luck,crazyL

Southpa · 07-12-2003, 05:23 PM

Thanks CL,. I'd like to kill 2 birds w/ one stone. Would the whole 73 up 3.40 rear end fit my 1970 (coils)? Gotta switch from 6 lug to 5 lug anyway.

crazy longhorn · 07-12-2003, 06:09 PM

http://www.classicperform.com/produc...ersion-Kit.htm

Hotrod70C10 · 07-12-2003, 10:04 PM

Here I go....
350/350 w/ stock 3.07's
It's a peg legged beast! lol....

**too much stuff** · 07-13-2003, 11:57 PM

I have a 68 gmc that had 3:54 or 3:56 (can't remember) My daily driver is 3:07 with a 33" tire. not much off the line, but cruises the hiway just fine. Oh yeah, 402, turbo 350 and 4x4

68CST327 · 07-14-2003, 01:50 AM

Well, according to the online RPM calculators, I'm almost positive I've got 4.56 gears. They're great off the line

*Phillip Johnson* · 07-14-2003, 01:54 AM

I had 4.56's in my one owner 72 Cheyenne 4x4 I sold 2 years ago. It was beyond me that I got 14mpg out of them when I have had 3.08's and only got 10mpg in another truck.

07-11-2003, 04:25 PM	#1
'70 C/10 SS500 Registered User Join Date: Jun 2003 Location: Chandler, AZ Posts: 130	Who's got the lowest rear gears!? Who has the lowest gears guys? Post your gears and motor/tranny info and see how you fall in with everyone else. Low and lowered would be even better! (Was Jim Carey in that one?) '70 C/10 292 I6, TH-350, Richmond 4.88s very soon to be 500 Caddy motor, M-21, 4.88s!!!!

07-11-2003, 06:02 PM	#3
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	350/350 COMBO 3.73 MAYBE FGONNA PUT IN 4.10 __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

07-11-2003, 06:16 PM	#4
Nova_Cobra64 Registered User Join Date: Aug 2002 Location: Melville, SK Posts: 1,144	I plan to put lower gears (have 3.08 right now) in my 69 as soon as I get my Saturn SC1 (gas miler), but don't know what direction to take as far as the ratio to go with. So anybody with 3.73 or 4.10's, post your opinion of weather you like them or not. __________________ 2004 Silverado - Beater 1969 GMC - In progress http://67-72chevytrucks.com/vboard/s...d.php?t=441683 2011 Aveo - Work commuter 2013 Crestliner Fish Hawk 1650 - The reason no work gets done on the project truck.

07-11-2003, 06:22 PM	#5
72moneypit Registered User Join Date: Jan 2003 Location: Mesa, Arizona Posts: 125	Well, I'm pretty sure I have 4.11's and I hate them. I think 3.73's would be best for me... a nice mix between torque, RPMs and gas mileage. __________________ Paul 72 Cheyenne Super Custom Camper greenaz@hotmail.com

07-11-2003, 06:36 PM	#6
Lucky59 Do you feel Lucky...? Join Date: Feb 2003 Location: Saskatchewan Posts: 452	I have 4:10's right now in my truck, I figured they were like 3:73's until I acutally tested it out... My setup is 350/TH400. Lucky __________________ 1959 Chevy Shortbox Stepside 1969 Chevy Custom C/10 1991 S-10 Blazer Sport 2003 Dodge SX2.0 R/T 2001 Mountain Cat 800 LE

07-11-2003, 05:42 PM	#2
68CST327 Registered User Join Date: Aug 2002 Location: USA Posts: 443	Hmm, I know I don't have 4.88's! That's wicked! I know I have either something like 4.10's or 4.56's, I'm not sure. 327 with a TH-400. I'm looking into swapping a TH-350 trans in there.

07-11-2003, 06:36 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	3.07 in one, and 4.56 in the other.

07-11-2003, 07:55 PM	#8
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	3.07 and they suck . At least i can cruise 75 @3000 RPM, and i can go over 80 in 2nd gear . __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

07-11-2003, 08:04 PM	#9
ABHaulR Registered User Join Date: Jun 2003 Location: West Valley City, Ut Posts: 311	right now stock 350/350 4:10 soon to be built 350/700r4 5:13 __________________ 72' GMC Suburban 10 1/2" of Lift, 40" Tires! Waiting for restoration 67' Chevy, What to do??? And Bad Ass American Bulldogs!

07-11-2003, 08:06 PM	#10
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	I have 4.10s, & like them! The old longhorn will cruise 80mph @ 3000 on the 4.10s......in 6th gear crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

07-11-2003, 10:56 PM	#11
shortbed70 Registered User Join Date: Mar 2002 Location: Forney TX Posts: 4,512	355/350th with 25.5 tall tire and used to have 4.56 but that rear is blown up see signiture. Didnt like the highway __________________ Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274

07-12-2003, 04:51 AM	#12
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	I've got a 67 parts C20 with 5.13:1. Detroit, too! For some strange reason it had a SpeedAlert speedometer. I found it set on 45 mph.... __________________ Just as if I knew what I was doin'

07-12-2003, 10:41 AM	#13
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	3.73's...originally with a 3-speed, then a THM400, and now a 700R4. Oh, and 28" tires. Without OD, it was more or less a town-cruiser...75+ for extended periods of time was a bit much. With OD, though...80-85 at a bit over 2500RPM is just fine. __________________ Project1970 - LS1 Swap Complete!

07-12-2003, 11:08 AM	#14
BraveDave Registered User Join Date: Dec 2002 Location: Magnolia, Texas Posts: 336	I recently installed 9:18 gears. I am going to help move the Astrodome about 6 feet to the left! __________________ '72 Chevy Cheyenne Super, '56 Chevy Bel Air,'56 Chevy Nomad, '61 Chevy Impala, '64 Cadillac Fleetwood, 1966 Thunderbird Convertible

07-12-2003, 11:29 AM	#15
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	lol...dave...i have 3.73s..bidding on 4.56s on ebay now __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA



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07-12-2003, 02:31 PM	#16
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,409	Is there any gearing between 3.07 and 3.73? Got 3.07 right now but would like to find something more mid-range. __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

07-12-2003, 03:14 PM	#17
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	350/350 4:10gears i hate it as i drive the truck about 300 miles a week __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

07-12-2003, 03:49 PM	#18
71sub Registered User Join Date: May 2002 Location: Stockton, CA Posts: 169	I've got a 350 / 700r4 setup with a Ford 9" posi 3.50 rear end and 31" tires --------- cruises pretty nice. Drive it around 100 miles every day. __________________ 71 C/10 : 350 / 700r4 ; Ford 9" posi 3.50 with 31x10.5 rear tires, single drive shaft, C-notch, 2.5" drop spindles, keyless entry 71 Suburban 350/350 -- caddy tail lights, keyless entry, late model seats, billet Autometer instrument cluster 70 Ford Torino -- 351W (balanced & blueprinted ), C4, VDO gauges

07-12-2003, 05:23 PM	#20
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,409	Thanks CL,. I'd like to kill 2 birds w/ one stone. Would the whole 73 up 3.40 rear end fit my 1970 (coils)? Gotta switch from 6 lug to 5 lug anyway. __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

07-12-2003, 06:09 PM	#21
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	http://www.classicperform.com/produc...ersion-Kit.htm __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

07-12-2003, 10:04 PM	#22
Hotrod70C10 Low & Slow Join Date: Dec 2002 Location: Oklahoma Posts: 1,047	Here I go.... 350/350 w/ stock 3.07's It's a peg legged beast! lol.... __________________ 70' C-10 LWB Fleetside 4.5/6 drop

07-13-2003, 11:57 PM	#23
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,786	gears I have a 68 gmc that had 3:54 or 3:56 (can't remember) My daily driver is 3:07 with a 33" tire. not much off the line, but cruises the hiway just fine. Oh yeah, 402, turbo 350 and 4x4

07-14-2003, 01:50 AM	#24
68CST327 Registered User Join Date: Aug 2002 Location: USA Posts: 443	Well, according to the online RPM calculators, I'm almost positive I've got 4.56 gears. They're great off the line

07-14-2003, 01:54 AM	#25
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,579	I had 4.56's in my one owner 72 Cheyenne 4x4 I sold 2 years ago. It was beyond me that I got 14mpg out of them when I have had 3.08's and only got 10mpg in another truck.

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