I hate 4.10 gears - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dr.Jones · 06-11-2008, 02:01 PM

My 70 lwb "Road Dog" hates them even worse. I did all the calculations before changing from 3.07's. But driving is believing. How it went down was,
after i changed out to my new motor I wanted a little more low end (stump puller) grunt but now I'm in forth gear at 40mph. and I can't stand it.
specs: 70 lwb 4x4, built 355 motor, sm465 4 speed manual tranny, np205 transfer case.
Luckily I swapped out only the rear to see if I liked the 4.10's or not.

NOT.

I'll be putting back the 3.07's today. I also think half my problem is that
sm465. I would love a 700r4.

bdozeraz · 06-11-2008, 02:05 PM

You just need bigger tires. Try some 35's and the 4.10 will be just about right. I am running 4.56 with 38" tires and I am thinking about going to 5.13 and 40's. I do have the 700r4 though.

Darkblu · 06-11-2008, 02:06 PM

Tell me about it. I have a sm465 and 4:10s and that 4th gear is a range of 15mph-55mph, ha. I can just about start it in 3rd from a stop.

Sinisterspeed · 06-11-2008, 02:27 PM

There are alot of Ratio's in between that. 3.07 seems really high for a 4x 4.10 is about right with 35's. If your running a smaller tires or a lower tranny maybe 3.55 would be the best of both worlds or as some may say the sweet spot!

lowriden58 · 06-11-2008, 02:32 PM

4.10s in my 71 are not highway friendly either BUT its just weekend cruiser/track beast

ive got a th350 so yeah 60mph @ 3kish is

Ackattack · 06-11-2008, 02:41 PM

I'll be running 4.10s in my 68, but that will be with a 4L60E and ~29" tires.

whatnow123 · 06-11-2008, 08:06 PM

I'm running 4.11 with a 700r and 30 inch tires.. runs about 2200 at 70 and first is squirly as hell.... but mine is a "hot rod".

Dr.Jones · 06-11-2008, 08:13 PM

Do they have like 2.56's as a stock option?

Jtrux · 06-11-2008, 08:48 PM

Quote:

Originally Posted by Dr.Jones

Do they have like 2.56's as a stock option?

What size tires are you running right now?

original_balzer · 06-11-2008, 09:15 PM

LOL I ran 4.56 gears for about 3 weeks in my 69 2wd stepside with 205x60x15 tires. I had a healthy 350 balanced and blueprinted. MAN was I fast from 0-50mph started out in 3rd all the time.

In a 4x4 with 33 or 35" tires 4.10's should be pretty nice.
The main thing your noticing is a HUGE jump from 3.07's
It would realy help to know what size tire your running but 3.40 down to 3.73 would be about right for 31" tires alot of guys will run 3.73 even with 33-35" tires for better economy. IF your engine is healthy enough you should still have good low end with that combo.

There IS a lot of other gear ratios in between 3.07 and 4.10 but the man ones to look at are 3.07, 3.40, 3.73, 4.10.
One because they provide noticable differences and two because they was available stock ratios from GM. Suppliers will make you almost any gears you want but going from a 3.07 to lets say a 3.15 wont make much differnce.

My vote is for 35" tires and keep the 4.10's.

NOTE: the highest stock gear ratio in a truck I have seen is a 2.73 so yes its close to 2.56.

scott123 · 06-11-2008, 09:49 PM

runninf 4.11's in my 69...35' with a th350....it will pull hell right up off its hinges as long as i stop at every gas pump on the way...scott

scott123 · 06-11-2008, 09:50 PM

i'm running 4.11's with 35's and a th350...will pull hell right off its hinges as long as i hit every gas pump along the way...scott

crazy longhorn · 06-11-2008, 09:57 PM

Got a set of Richmond 4.10s & a 4 series posi under the bench
.......they sure were fun to play with tho

When fuel started climing, I put the 3.40s back in.......dont think I saved much on fuel, but can you say "freeway flya"(3100 on the tac @ 105 in 6th gear)

crazyL

Dr.Jones · 06-11-2008, 10:54 PM

Thanks for the replies.

I'm running 31" tires. with a tape measure they are actually 30.5"

*ksjh1316* · 06-11-2008, 10:58 PM

Quote:

Originally Posted by crazy longhorn

(3100 on the tac @ 105 in 6th gear)

crazyL

Damn that would be some white knuckle driving for me as aerodynamic as these trucks the wind noise had to make it seem like you were going a heck of a lot faster

**special-K** · 06-11-2008, 10:59 PM

I love 4.10s.I roll at 75-80 mph all day long.Man that motor sounds happy!

Blue_71 · 06-12-2008, 12:41 AM

same as special-k here, my K20 has 4.10s in it.. if you can put up with the vibration, it'll roll right along at 80mph all day long

**mr48chev** · 06-12-2008, 12:55 AM

My 71 C20 with 245 x 16 street tires and 4.11 rear gets 12.5 going back and forth to work but the trip is 23 miles each way so it gets spendy. I drive on a 55 mph road but if I went over on the freeway I think I would be getting about 10. I am hunting for a 3.55 rear or even a 3.73.

72-c20 · 06-12-2008, 01:13 AM

after reading this I think I should keep my 33's on.....

**special-K** · 06-12-2008, 07:12 AM

I got 12.5 in my blue`72 truck with 4.10s and 35" tires.I`d roll at 60-62 on the speedo,which was about 66-68 mph.The truck had a 400 SBC.It seemed to be an ideal set-up.It had plenty of bottom end and just rolled on the tires with little throttle.

1bad chevy · 06-12-2008, 07:49 AM

i love'd them when i had my 355 in my 72 they ran about 2200 rpm's between 55 and 65mph BUT I HATE THEM with my new power plant of a 500 caddy top's put to quick

haysonj · 06-12-2008, 07:59 AM

I've got 4.09 gears in. mine with 35 in tires and a Gear Vendors OD. It runs 65 at around 2200 RPM. the 383 will still set you back in the seat with the OD off.

Dr.Jones · 06-12-2008, 10:56 PM

4.10's with a sm465 is like a two speed. At least with the 3.07's I can fake a 3 speed again.

Sounds like all your rigs are bad ass. right on!!!!!

**special-K** · 06-12-2008, 11:06 PM

Not sure I understand.Isn`t it like a 3spd?

06-11-2008, 02:01 PM	#1
Dr.Jones Registered User Join Date: Aug 2004 Location: Westminster, Colorado Posts: 36	I hate 4.10 gears My 70 lwb "Road Dog" hates them even worse. I did all the calculations before changing from 3.07's. But driving is believing. How it went down was, after i changed out to my new motor I wanted a little more low end (stump puller) grunt but now I'm in forth gear at 40mph. and I can't stand it. specs: 70 lwb 4x4, built 355 motor, sm465 4 speed manual tranny, np205 transfer case. Luckily I swapped out only the rear to see if I liked the 4.10's or not. NOT. I'll be putting back the 3.07's today. I also think half my problem is that sm465. I would love a 700r4. __________________ 70 K-10 75 CJ-5 90 XJ Smell the Magic!

06-11-2008, 02:05 PM	#2
bdozeraz Registered User Join Date: Jun 2007 Location: Phx, Az Posts: 51	Re: I hate 4.10 gears You just need bigger tires. Try some 35's and the 4.10 will be just about right. I am running 4.56 with 38" tires and I am thinking about going to 5.13 and 40's. I do have the 700r4 though.

06-11-2008, 02:06 PM	#3
Darkblu Registered User Join Date: May 2008 Location: Cincinnati, Ohio Posts: 26	Re: I hate 4.10 gears Tell me about it. I have a sm465 and 4:10s and that 4th gear is a range of 15mph-55mph, ha. I can just about start it in 3rd from a stop.

06-11-2008, 02:27 PM	#4
Sinisterspeed Registered User Join Date: Apr 2008 Location: Gales Creek, Oregon Posts: 619	Re: I hate 4.10 gears There are alot of Ratio's in between that. 3.07 seems really high for a 4x 4.10 is about right with 35's. If your running a smaller tires or a lower tranny maybe 3.55 would be the best of both worlds or as some may say the sweet spot! __________________ There are two kinds of people, those who finish what they start and so on. 70 GMC Longhorn (A.K.A Money Bucket) 57 Chev 3100 05 Chevy LLY Dmax. 67 Chevy Camaro Dad's Budget Build 55 My Longhorn Build Last edited by Sinisterspeed; 06-11-2008 at 02:28 PM.

06-11-2008, 02:32 PM	#5
lowriden58 Registered User Join Date: Jan 2008 Location: Chesapeake Beach, MD Posts: 812	Re: I hate 4.10 gears 4.10s in my 71 are not highway friendly either BUT its just weekend cruiser/track beast ive got a th350 so yeah 60mph @ 3kish is __________________ 71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 http://i195.photobucket.com/albums/z...en58/001-2.jpg

06-11-2008, 02:41 PM	#6
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Re: I hate 4.10 gears I'll be running 4.10s in my 68, but that will be with a 4L60E and ~29" tires. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

06-11-2008, 08:06 PM	#7
whatnow123 Registered User Join Date: Oct 2006 Location: Arizona Posts: 835	Re: I hate 4.10 gears I'm running 4.11 with a 700r and 30 inch tires.. runs about 2200 at 70 and first is squirly as hell.... but mine is a "hot rod". __________________ 67 Short Step, 355, 700R 4.11 posi rear, 4/6 drop Discs on all 4 corners. Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219094

06-11-2008, 08:13 PM	#8
Dr.Jones Registered User Join Date: Aug 2004 Location: Westminster, Colorado Posts: 36	Re: I hate 4.10 gears Do they have like 2.56's as a stock option? __________________ 70 K-10 75 CJ-5 90 XJ Smell the Magic!

06-11-2008, 09:15 PM	#10
original_balzer Registered User Join Date: May 2008 Location: roosevelt utah Posts: 325	Re: I hate 4.10 gears LOL I ran 4.56 gears for about 3 weeks in my 69 2wd stepside with 205x60x15 tires. I had a healthy 350 balanced and blueprinted. MAN was I fast from 0-50mph started out in 3rd all the time. In a 4x4 with 33 or 35" tires 4.10's should be pretty nice. The main thing your noticing is a HUGE jump from 3.07's It would realy help to know what size tire your running but 3.40 down to 3.73 would be about right for 31" tires alot of guys will run 3.73 even with 33-35" tires for better economy. IF your engine is healthy enough you should still have good low end with that combo. There IS a lot of other gear ratios in between 3.07 and 4.10 but the man ones to look at are 3.07, 3.40, 3.73, 4.10. One because they provide noticable differences and two because they was available stock ratios from GM. Suppliers will make you almost any gears you want but going from a 3.07 to lets say a 3.15 wont make much differnce. My vote is for 35" tires and keep the 4.10's. NOTE: the highest stock gear ratio in a truck I have seen is a 2.73 so yes its close to 2.56. Last edited by original_balzer; 06-11-2008 at 09:17 PM.

06-11-2008, 09:49 PM	#11
scott123 Registered User Join Date: Dec 2007 Location: Middleburg, North Carolina Posts: 480	Re: I hate 4.10 gears runninf 4.11's in my 69...35' with a th350....it will pull hell right up off its hinges as long as i stop at every gas pump on the way...scott

06-11-2008, 09:50 PM	#12
scott123 Registered User Join Date: Dec 2007 Location: Middleburg, North Carolina Posts: 480	Re: I hate 4.10 gears i'm running 4.11's with 35's and a th350...will pull hell right off its hinges as long as i hit every gas pump along the way...scott

06-11-2008, 09:57 PM	#13
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Re: I hate 4.10 gears Got a set of Richmond 4.10s & a 4 series posi under the bench .......they sure were fun to play with tho When fuel started climing, I put the 3.40s back in.......dont think I saved much on fuel, but can you say "freeway flya"(3100 on the tac @ 105 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....

06-11-2008, 10:54 PM	#14
Dr.Jones Registered User Join Date: Aug 2004 Location: Westminster, Colorado Posts: 36	Re: I hate 4.10 gears Thanks for the replies. I'm running 31" tires. with a tape measure they are actually 30.5" __________________ 70 K-10 75 CJ-5 90 XJ Smell the Magic! Last edited by Dr.Jones; 06-11-2008 at 10:56 PM.

06-11-2008, 10:59 PM	#16
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: I hate 4.10 gears I love 4.10s.I roll at 75-80 mph all day long.Man that motor sounds happy! __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-12-2008, 12:55 AM	#18
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,721	Re: I hate 4.10 gears My 71 C20 with 245 x 16 street tires and 4.11 rear gets 12.5 going back and forth to work but the trip is 23 miles each way so it gets spendy. I drive on a 55 mph road but if I went over on the freeway I think I would be getting about 10. I am hunting for a 3.55 rear or even a 3.73.



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06-12-2008, 01:13 AM	#19
72-c20 Packrat Join Date: May 2008 Location: Central Iowa Posts: 459	Re: I hate 4.10 gears after reading this I think I should keep my 33's on..... __________________ gone: --'07 Tahoe LTZ 4WD --'68 Firebird 400 Convertible gone: --'72 Chevy K20

06-12-2008, 07:12 AM	#20
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: I hate 4.10 gears I got 12.5 in my blue`72 truck with 4.10s and 35" tires.I`d roll at 60-62 on the speedo,which was about 66-68 mph.The truck had a 400 SBC.It seemed to be an ideal set-up.It had plenty of bottom end and just rolled on the tires with little throttle. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-12-2008, 07:49 AM	#21
1bad chevy Registered User Join Date: Dec 2006 Location: POWNAL VERMONT Posts: 343	Re: I hate 4.10 gears i love'd them when i had my 355 in my 72 they ran about 2200 rpm's between 55 and 65mph BUT I HATE THEM with my new power plant of a 500 caddy top's put to quick __________________ 1972 c-20 chevy 500 caddy/4.10posi / 1972 3/4 ton gmc 350 4x4/4.10posi front&rear

06-12-2008, 07:59 AM	#22
haysonj Registered User Join Date: Dec 2007 Location: Santa Maria, Ca. Posts: 1,423	Re: I hate 4.10 gears I've got 4.09 gears in. mine with 35 in tires and a Gear Vendors OD. It runs 65 at around 2200 RPM. the 383 will still set you back in the seat with the OD off. __________________ 69 Chevy 4x4 383 Power

06-12-2008, 10:56 PM	#23
Dr.Jones Registered User Join Date: Aug 2004 Location: Westminster, Colorado Posts: 36	Re: I hate 4.10 gears 4.10's with a sm465 is like a two speed. At least with the 3.07's I can fake a 3 speed again. Sounds like all your rigs are bad ass. right on!!!!! __________________ 70 K-10 75 CJ-5 90 XJ Smell the Magic!

06-12-2008, 11:06 PM	#24
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: I hate 4.10 gears Not sure I understand.Isn`t it like a 3spd? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

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