View Poll Results: 3.73 or 4.11 for my family hauler DD
3.73 = 1974rpm @75mph
14
45.16%
4.11 = 2175rpm @75mph
17
54.84%
Voters: 31. You may not vote on this poll
Gears for my DD poll
#1
Gears for my DD poll
Another gear poll. I've been reading about this since I bought my truck since I knew it would require a gear change one day. I've read a ton but still can't decide between 3.73 & 4.11.
My goals are to increase gas mileage (both city & hwy) while improving drivability and performance fun factor.
Truck is a 2011 CCSB 4x4 with 5.3 LC9, 6speed, 3.08 gears and 275/55 on factory chrome clad 20's. Right now I have 4" PVC intake & BB tune, future holds headers and hopefully TVS1900, no cam or stall. I travel 80% city 20% hwy and my highway trips are 200 miles thru the flint hills of KS, long graded hills and always windy. No towing. I'll be driving this truck for many, many years and it could be our family hauler for highway trips to grandma’s house, so I need to it be manageable on the highway. This is going to be expensive so I only got one shot!
I want the 4.11 but the only fear I have is 75 MPH cruising RPM. Gear calculator tells me the 4.11s at 75 and 31.9" tire will get me 2175 RPM. 3.73 = 1974 RPM.
The poll, 3.73 or 4.11 and is 2175 cruising RPM a big deal? Should I go for the gear??
My goals are to increase gas mileage (both city & hwy) while improving drivability and performance fun factor.
Truck is a 2011 CCSB 4x4 with 5.3 LC9, 6speed, 3.08 gears and 275/55 on factory chrome clad 20's. Right now I have 4" PVC intake & BB tune, future holds headers and hopefully TVS1900, no cam or stall. I travel 80% city 20% hwy and my highway trips are 200 miles thru the flint hills of KS, long graded hills and always windy. No towing. I'll be driving this truck for many, many years and it could be our family hauler for highway trips to grandma’s house, so I need to it be manageable on the highway. This is going to be expensive so I only got one shot!
I want the 4.11 but the only fear I have is 75 MPH cruising RPM. Gear calculator tells me the 4.11s at 75 and 31.9" tire will get me 2175 RPM. 3.73 = 1974 RPM.
The poll, 3.73 or 4.11 and is 2175 cruising RPM a big deal? Should I go for the gear??
#3
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Id say 373 over 410s for gas mileage wise. Youll still have good power as well. I had 410s in my 5.3. S10 got terrible mileage switched to 373s gas mileage was so much better. As of course its ur chioce
#4
I am wondering how gas mileage would compare between the 2, given only 200rpm difference at 75mph.
#6
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A couple things different than your 410 setup is my 6th gear being 0.67 instead of the 4L60e 0.70, if thats what you had. And my 32" tires. I don't know what your setup was though.
I am wondering how gas mileage would compare between the 2, given only 200rpm difference at 75mph.
I am wondering how gas mileage would compare between the 2, given only 200rpm difference at 75mph.
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#9
TECH Enthusiast
I'm gonna go against the current here
200 rpms in this case might actually increase mpg buy a hair, your turning slight more rpms, but the engine is working less to do the same amount of work. 4.10s am don't look back. I DD my 97 with 4.10s, 75 put my at 2450, didn't mind it at all
200 rpms in this case might actually increase mpg buy a hair, your turning slight more rpms, but the engine is working less to do the same amount of work. 4.10s am don't look back. I DD my 97 with 4.10s, 75 put my at 2450, didn't mind it at all