3.73 or 4.10 what would be the best - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 4x4 chevy · 01-20-2010, 08:42 PM

I have a 1972 K-10, 350, 3 on the tree, 35-12.50-15 tires, running 3.07 front and rearends. The motor is strong but it`s geared to high. I think for the tires I`m going to go with 30-10.50-15 when the others wear out. I thought maybe someone on here had the same problem and could give me some good info. Thanks.

nickp51chevy · 01-20-2010, 09:11 PM

What are you trying to accomplish? Do you want better gas mileage or do you want to have more power to the wheels?

**71blksuper4x4** · 01-20-2010, 09:12 PM

4.10

hayhauler71 · 01-20-2010, 09:53 PM

Quote:

Originally Posted by 71blksuper4x4

4.10

x2

fjthompsoniii · 01-20-2010, 09:56 PM

I think when you switch to thirty inch tires you will like the 3.07 I'd see what its like before I went and changed diffs.

72 4x4 chevy · 01-20-2010, 11:43 PM

I want more power at the wheels and still get decent gas mileage.

72 4x4 chevy · 01-20-2010, 11:45 PM

I want more power at the wheels and still get decent gas mileage.

nickp51chevy · 01-21-2010, 12:00 AM

I would say if you're going to a 30" wheel the go to 3.73. That's the same set up I have on my '88 4x4 w/ a 350/350 and I get about 15mpg average. I still have decent power. I'm not gonna win any drag races, but it's enough for me.

72 4x4 chevy · 01-21-2010, 12:17 AM

I just want to be able to pull my bike trailor that hauls 2 Harleys (about 1400 lbs) and not have to down shift when I hit a small hill.

knsmodels · 01-21-2010, 12:47 AM

I would go with the 4:10's but I would also go with like 33" tires....in my opinion the 30" will look to small on your truck....JMHO

*highperf4x4* · 01-21-2010, 01:23 AM

Quote:

Originally Posted by knsmodels

I would go with the 4:10's but I would also go with like 33" tires....in my opinion the 30" will look to small on your truck....JMHO

x2

**71blksuper4x4** · 01-21-2010, 02:33 AM

oops, I misread your message. I didn't see you were wanting to put 30" tires on it. 3:07 would be fine with 30" tires. 3:73 would be better for pulling with 30" tires, and 4:10 would almost be overkill for them. I agree that you should atleast have some 33"s so the truck doesn't look rediculous without some bigger tires under a lifted vehicle. Trevor

nickp51chevy · 01-21-2010, 01:00 AM

30's aren't that bad. I have the stock size tires on my '71 and they are 28.8" and they don't look bad. I did put the 30's from my '88 on my '71 4x4 to see how it would look. I thought it filled up the wheel wells nicely.

Frankie Humphries · 01-21-2010, 05:39 PM

with 30" tires you should be fine w the 3.07s

capev86 · 01-21-2010, 08:31 PM

3.73 is a good compromise in a 1/2 ton truck. if it was a 3/4 ton and i was pulling loads with it, i'd want the 4.10. either rear gear with an overdrive will be waaaaay better than a 3.07 for solo highway driving.

Jacfourteen · 01-21-2010, 10:47 PM

Quote:

Originally Posted by capev86

3.73 is a good compromise in a 1/2 ton truck. if it was a 3/4 ton and i was pulling loads with it, i'd want the 4.10.

x2

69 longhorn · 01-21-2010, 11:31 PM

on a 30" tire, I would agree that a 3.73 will give you the best all around power. If it were mine, I would swap the 35's for the 30's that you are lookin at, & see how she feels. You are running 3 series gears, & can swap to a 3.42 gear set without swapping carriers(a little cheaper in the long run). The 33" tires will take 3.73 to 4.10 gears to be "right with the world", & you will be 4.10-4.56 with 35" tires (to get the best power). Best of luck,crazyAL

*Sublvr72* · 01-22-2010, 04:16 AM

If you have a 3 speed transmission 3.73's, if you have over drive 4.10 would work. If you want gas mileage stick with 3.73 regardless of what trans you have

01-20-2010, 08:42 PM	#1
72 4x4 chevy Registered User Join Date: Dec 2009 Location: Liberty, Ky Posts: 11	3.73 or 4.10 what would be the best I have a 1972 K-10, 350, 3 on the tree, 35-12.50-15 tires, running 3.07 front and rearends. The motor is strong but it`s geared to high. I think for the tires I`m going to go with 30-10.50-15 when the others wear out. I thought maybe someone on here had the same problem and could give me some good info. Thanks.

01-20-2010, 09:11 PM	#2
nickp51chevy Registered Chevy Owner Join Date: Aug 2008 Location: Snohomish, wa Posts: 1,557	Re: 3.73 or 4.10 what would be the best What are you trying to accomplish? Do you want better gas mileage or do you want to have more power to the wheels? __________________ Love is fleeting, but Chevy trucks are forever!!!! 1970 Chevy CST C10 long box 350/400 2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350

01-20-2010, 09:12 PM	#3
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: 3.73 or 4.10 what would be the best 4.10 __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

01-20-2010, 09:56 PM	#5
fjthompsoniii Registered User Join Date: Jan 2009 Location: enumclaw wa Posts: 58	Re: 3.73 or 4.10 what would be the best I think when you switch to thirty inch tires you will like the 3.07 I'd see what its like before I went and changed diffs.

01-20-2010, 11:43 PM	#6
72 4x4 chevy Registered User Join Date: Dec 2009 Location: Liberty, Ky Posts: 11	Re: 3.73 or 4.10 what would be the best I want more power at the wheels and still get decent gas mileage.

01-20-2010, 11:45 PM	#7
72 4x4 chevy Registered User Join Date: Dec 2009 Location: Liberty, Ky Posts: 11	Re: 3.73 or 4.10 what would be the best I want more power at the wheels and still get decent gas mileage.

01-21-2010, 12:00 AM	#8
nickp51chevy Registered Chevy Owner Join Date: Aug 2008 Location: Snohomish, wa Posts: 1,557	Re: 3.73 or 4.10 what would be the best I would say if you're going to a 30" wheel the go to 3.73. That's the same set up I have on my '88 4x4 w/ a 350/350 and I get about 15mpg average. I still have decent power. I'm not gonna win any drag races, but it's enough for me. __________________ Love is fleeting, but Chevy trucks are forever!!!! 1970 Chevy CST C10 long box 350/400 2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350 Last edited by nickp51chevy; 01-21-2010 at 12:02 AM. Reason: +

01-21-2010, 12:17 AM	#9
72 4x4 chevy Registered User Join Date: Dec 2009 Location: Liberty, Ky Posts: 11	Re: 3.73 or 4.10 what would be the best I just want to be able to pull my bike trailor that hauls 2 Harleys (about 1400 lbs) and not have to down shift when I hit a small hill.

01-21-2010, 12:47 AM	#10
knsmodels I make Models Join Date: May 2005 Location: Bucks, PA Posts: 626	Re: 3.73 or 4.10 what would be the best I would go with the 4:10's but I would also go with like 33" tires....in my opinion the 30" will look to small on your truck....JMHO __________________ Click to see what I do 1972 LWB K10 350/4 sp 1968 SS Chevelle 396/tremac5spd

01-21-2010, 02:33 AM	#12
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,155	Re: 3.73 or 4.10 what would be the best oops, I misread your message. I didn't see you were wanting to put 30" tires on it. 3:07 would be fine with 30" tires. 3:73 would be better for pulling with 30" tires, and 4:10 would almost be overkill for them. I agree that you should atleast have some 33"s so the truck doesn't look rediculous without some bigger tires under a lifted vehicle. Trevor __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

01-21-2010, 01:00 AM	#13
nickp51chevy Registered Chevy Owner Join Date: Aug 2008 Location: Snohomish, wa Posts: 1,557	Re: 3.73 or 4.10 what would be the best 30's aren't that bad. I have the stock size tires on my '71 and they are 28.8" and they don't look bad. I did put the 30's from my '88 on my '71 4x4 to see how it would look. I thought it filled up the wheel wells nicely. __________________ Love is fleeting, but Chevy trucks are forever!!!! 1970 Chevy CST C10 long box 350/400 2008 Chevy Silverado short box 4x4 Had; 1951 Chevy short box 307/T5 1988 Chevy shot box 4x4 350/350 1971 Chevy C10 long box 4x4 350/350 1971 Chevy C20 long box 350/350 1971 Chevy C10 long box 350/350

01-21-2010, 05:39 PM	#14
Frankie Humphries Registered User Join Date: May 2009 Location: Tallahassee, FL Posts: 15	Re: 3.73 or 4.10 what would be the best with 30" tires you should be fine w the 3.07s __________________ If you're not first, your last!

01-21-2010, 08:31 PM	#15
capev86 Registered User Join Date: May 2009 Location: Eliot, Maine Posts: 1,314	Re: 3.73 or 4.10 what would be the best 3.73 is a good compromise in a 1/2 ton truck. if it was a 3/4 ton and i was pulling loads with it, i'd want the 4.10. either rear gear with an overdrive will be waaaaay better than a 3.07 for solo highway driving.

01-21-2010, 11:31 PM	#17
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	Re: 3.73 or 4.10 what would be the best on a 30" tire, I would agree that a 3.73 will give you the best all around power. If it were mine, I would swap the 35's for the 30's that you are lookin at, & see how she feels. You are running 3 series gears, & can swap to a 3.42 gear set without swapping carriers(a little cheaper in the long run). The 33" tires will take 3.73 to 4.10 gears to be "right with the world", & you will be 4.10-4.56 with 35" tires (to get the best power). Best of luck,crazyAL __________________ http://community.webshots.com/user/hotrodhorn

01-22-2010, 04:16 AM	#18
Sublvr72 Account Suspended Join Date: May 2004 Location: Simi Valley, CA Posts: 1,387	Re: 3.73 or 4.10 what would be the best If you have a 3 speed transmission 3.73's, if you have over drive 4.10 would work. If you want gas mileage stick with 3.73 regardless of what trans you have



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