Anyone else have factory 4.11 gears in a 68? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68 with 350 TPI · 06-16-2002, 11:46 PM

Just wondering

*Fast68Chevy* · 06-17-2002, 01:46 AM

do you ?
whats all the stampings on the very edge of your ring gear state ?? the year and teeth counts wil be listed on it, and the date code will be cast onto a webbing of the center housing also.

whats truck is it and what rear axle is it ? 4.11 was available in 1/2 ton all years of 67-72, but only three trucks that i know of in existence have the ratio,

68 with 350 TPI · 06-17-2002, 02:02 AM

Well I will have to check the next time I do a lube chage but the gears were a 4.11 set by the teeth count when I was chaging the fluid.

I assume they are the factory gears as they are 4.11 by count and my option code on my GB door says 411 axle ratio.

Anything else I should check for?

68 with 350 TPI · 06-17-2002, 02:04 AM

BTW the truck is a 68 CST that had a 327 and manual trans.

Its now getting the TPI and 700r4.

68 Suburban · 06-17-2002, 02:33 AM

Fine69 does in his 50th.

toms68cst · 06-17-2002, 08:25 AM

I've got the 4 speed Ch-465/327 combo too. I'm not sure of the gear ratio though. I guess I have the default ratio for that combo. I don't have any other ratios listed on my build sheet.

breeh · 06-17-2002, 10:53 AM

My new '68 short step 4x4 has factory 4:10 in the rear and a 4:11 in the front...

Luckymic34 · 06-17-2002, 04:09 PM

Mine came stock with it, and also a 3 speed manual with overdrive. It was part of the option.

**CPNE** · 06-17-2002, 07:22 PM

My son's 68 burb has a 4:11 posi. Originally a 307 4 speed truck, now a 350 4 speed. It's hauling me to Carlisle PA in 2 weeks

*Fast68Chevy* · 06-17-2002, 11:49 PM

Quote:

Originally posted by breeh
My new '68 short step 4x4 has factory 4:10 in the rear and a 4:11 in the front...

4.11 was not avaialable in 67-72 for K10 trucks, check the data book and see for yourself,

68 with tpi, yeap you got 4.11 then, good deal! you didnt mention it was on label even! you dont need to check anything else lol

luckymic34 is correct, o/d M10 came with 4.11 automatically was part of the M10 rpo

Tom68, 4.11 not available with 327 or 396 engine in 68.
327 not available with o/d M10 tranny
327 and 4 speed should be 3.73 std ratio according to data book

i dunon if you have a 68 data book or not or copy of conventinal gasoline section or not.

Longhorn Man · 06-17-2002, 11:55 PM

I'm still trying to figure why anyone would want one gear in front, and another in the rear. All that would do is wear tires, break transfer cases, and make it funny in the snow.

*Shane* · 06-17-2002, 11:57 PM

I have a 6 lug 4.11 rear end laying out behind the shop.....junked that motha in favor of a 5 lug 3.08.

breeh · 06-18-2002, 12:06 AM

Fast, I know that you have more experience than most with these trucks but I can tell you (I probably have approx, 10 more years playing with old Chevy's than you, just a function of age) that there are no absolutes when it comes to Chevy products. The data book may state that there are no 4:10/4:11 combos but I can guarantee you that if Ma Bell wanted to order 100 4 wheel drive stepsides with that gear ratio then they would get it. The collection of real world truck data from this era is what makes us all smarter. The General printed the data but just like today, the print shop and the production line didn't always agree. I can tell you, this closed knuckle front end has factory 4:11's. This truck's history has been documented since conception. The point of this response is just to tell you.......be open to the possibility....

breeh · 06-18-2002, 12:09 AM

Longhornmail, while I was writing my dissertation you responded. All 4x4's have an offset gear ratio. It works better offroading to have the front spinning slightly faster than the rear.

*Fast68Chevy* · 06-18-2002, 03:43 AM

breeh is right about the offset, all ahve that normally, 4.55 is front ratio in our 3/4 ton 4x4 trucks, 4.57 in rear, so,,,,

but 1/2 ton 4x4 were std with 3.73 front and rear, so,,,,

it doesnt hurt anything it actually helps traction to pull truck through mud instead of pushing and getting rear stuck first.

i hahve yet to see a truck with any other ratio than what data book says would have per drivetrain, i know that its not solid after what the print says, you could order whatever you wish to probably if you are rich enough, but i think not even 1/2 a percent of our trucks were ordered with incorrect normally not available ratio or option that other trucks couldnt get per factory data specifications., hence the yenko and baldwin motion camaros....and others.
trucks were not something that they were doing that to, they were for work not for play back then, no one was gonna spend extra $$ to get 4.11 in a 1/2 ton 4x4 that GM says was not available for those,.
i have a point here, dunno if it showed or made sense, i tried lol

06-16-2002, 11:46 PM	#1
68 with 350 TPI Registered User Join Date: May 2002 Location: Wingate NC Posts: 456	Anyone else have factory 4.11 gears in a 68? Just wondering __________________ Life is good with a 6-71 supercharged 355 in a 72 camaro

06-17-2002, 02:02 AM	#3
68 with 350 TPI Registered User Join Date: May 2002 Location: Wingate NC Posts: 456	Well I will have to check the next time I do a lube chage but the gears were a 4.11 set by the teeth count when I was chaging the fluid. I assume they are the factory gears as they are 4.11 by count and my option code on my GB door says 411 axle ratio. Anything else I should check for? __________________ Life is good with a 6-71 supercharged 355 in a 72 camaro

06-17-2002, 02:04 AM	#4
68 with 350 TPI Registered User Join Date: May 2002 Location: Wingate NC Posts: 456	BTW the truck is a 68 CST that had a 327 and manual trans. Its now getting the TPI and 700r4. __________________ Life is good with a 6-71 supercharged 355 in a 72 camaro

06-17-2002, 02:33 AM	#5
68 Suburban Registered User Join Date: Oct 2000 Location: From Chicago, Live in Phoenix, AZ Posts: 6,802	Fine69 does in his 50th. __________________ Just sitting here contemplating contemplation.

06-17-2002, 08:25 AM	#6
toms68cst Registered User Join Date: Jun 2000 Location: Bismarck, ND Posts: 4,300	I've got the 4 speed Ch-465/327 combo too. I'm not sure of the gear ratio though. I guess I have the default ratio for that combo. I don't have any other ratios listed on my build sheet. __________________ Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club.

06-17-2002, 01:46 AM	#2
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	do you ? whats all the stampings on the very edge of your ring gear state ?? the year and teeth counts wil be listed on it, and the date code will be cast onto a webbing of the center housing also. whats truck is it and what rear axle is it ? 4.11 was available in 1/2 ton all years of 67-72, but only three trucks that i know of in existence have the ratio,

06-17-2002, 10:53 AM	#7
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	My new '68 short step 4x4 has factory 4:10 in the rear and a 4:11 in the front... __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

06-17-2002, 04:09 PM	#8
Luckymic34 Whisky Bent & Hell Bound Join Date: Apr 2001 Location: Chula Vista, CA Posts: 430	Mine came stock with it, and also a 3 speed manual with overdrive. It was part of the option. __________________ 68 custom stepside PS,PB 350 with Vortec Heads,Carter 650, Edelbrock Performer,HEI, Crane Enegizer 266, Headmen headers 40 series Flowmasters, B&M hole shot 2,000 rmp stall, TCI TH350 Streetfighter, 4.10 gears 2003 Harley Davidson 883C San Diego, CA by way of Houston, TX

06-17-2002, 07:22 PM	#9
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	My son's 68 burb has a 4:11 posi. Originally a 307 4 speed truck, now a 350 4 speed. It's hauling me to Carlisle PA in 2 weeks __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

06-17-2002, 11:55 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I'm still trying to figure why anyone would want one gear in front, and another in the rear. All that would do is wear tires, break transfer cases, and make it funny in the snow.

06-17-2002, 11:57 PM	#12
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	I have a 6 lug 4.11 rear end laying out behind the shop.....junked that motha in favor of a 5 lug 3.08.

06-18-2002, 12:06 AM	#13
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Fast, I know that you have more experience than most with these trucks but I can tell you (I probably have approx, 10 more years playing with old Chevy's than you, just a function of age) that there are no absolutes when it comes to Chevy products. The data book may state that there are no 4:10/4:11 combos but I can guarantee you that if Ma Bell wanted to order 100 4 wheel drive stepsides with that gear ratio then they would get it. The collection of real world truck data from this era is what makes us all smarter. The General printed the data but just like today, the print shop and the production line didn't always agree. I can tell you, this closed knuckle front end has factory 4:11's. This truck's history has been documented since conception. The point of this response is just to tell you.......be open to the possibility.... __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

06-18-2002, 12:09 AM	#14
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Longhornmail, while I was writing my dissertation you responded. All 4x4's have an offset gear ratio. It works better offroading to have the front spinning slightly faster than the rear. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

06-18-2002, 03:43 AM	#15
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	breeh is right about the offset, all ahve that normally, 4.55 is front ratio in our 3/4 ton 4x4 trucks, 4.57 in rear, so,,,, but 1/2 ton 4x4 were std with 3.73 front and rear, so,,,, it doesnt hurt anything it actually helps traction to pull truck through mud instead of pushing and getting rear stuck first. i hahve yet to see a truck with any other ratio than what data book says would have per drivetrain, i know that its not solid after what the print says, you could order whatever you wish to probably if you are rich enough, but i think not even 1/2 a percent of our trucks were ordered with incorrect normally not available ratio or option that other trucks couldnt get per factory data specifications., hence the yenko and baldwin motion camaros....and others. trucks were not something that they were doing that to, they were for work not for play back then, no one was gonna spend extra $$ to get 4.11 in a 1/2 ton 4x4 that GM says was not available for those,. i have a point here, dunno if it showed or made sense, i tried lol



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