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

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.

*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

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: 5,156	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, 01:00 AM	#11
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, 02:33 AM	#13
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,156	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, 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



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.