3.42 to 4.10 mpg difference?
08-21-2005, 03:20 PM
#11
TECH Fanatic
iTrader: (15)
Join Date: Feb 2005
Location: belleville, il
Posts: 1,087
Likes: 0
Received 0 Likes
on
0 Posts
no it gets really good mileage in the city cause ot shifts at like 1200 rpm on the stock stall going light to light or crusing at 30-40 anything over 30 mph my truck's converter locks up and it just pulls 900-1000 rpm give it a lil extra gas it will stay locked and just pull up a lil
08-21-2005, 08:54 PM
#12
On The Tree
Join Date: May 2005
Location: Pearland, TX
Posts: 178
Likes: 0
Received 0 Likes
on
0 Posts
First I have heard of soemone getting BETTER mileage in town than on the highway 
I now have 19K miles on my CCSB 2wd and I have the 3.23's, and I have calculated all tanks of fuel sice day one. 15-16 MPG @ town and 20-21MPG on the highway. I just made a trip from Houston to Detroit and back, and having the cruise on 70-75 the whole way back got 20.5-21 MPG with a best of 21.9 MPG. I am in the process of swapping out gears, and I am going back and forth between 3.73's or 4.10's, running the stock 17" wheel and tire combo, and MAYBE running a bit taller tire when it comes time to change them out. With those that have 3.73's and 4.10's what is your RPM @ 70 MPH? I am @ 1800-1850 RPM give or take. And also, list your tire size as well, thanks.
I now have 19K miles on my CCSB 2wd and I have the 3.23's, and I have calculated all tanks of fuel sice day one. 15-16 MPG @ town and 20-21MPG on the highway. I just made a trip from Houston to Detroit and back, and having the cruise on 70-75 the whole way back got 20.5-21 MPG with a best of 21.9 MPG. I am in the process of swapping out gears, and I am going back and forth between 3.73's or 4.10's, running the stock 17" wheel and tire combo, and MAYBE running a bit taller tire when it comes time to change them out. With those that have 3.73's and 4.10's what is your RPM @ 70 MPH? I am @ 1800-1850 RPM give or take. And also, list your tire size as well, thanks.
08-23-2005, 12:37 PM
#15
On The Tree
Join Date: May 2005
Location: Pearland, TX
Posts: 178
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by negativeswitches
i run about 2500rpm at 80 on some worn out 245-70-17's
i think i run 2000rpm at 60-65 i forget for sure have to check for ya
these are on 4.10's
-Erik
i think i run 2000rpm at 60-65 i forget for sure have to check for ya
these are on 4.10's
-Erik
Yeah if yo can check next time out that would be great. Hauling a trailer with the 3.23's is KILLING this truck. I have to haul in 3rd gear on FLAT ground @ 70MPH pulling my car. I also picked up 6.0L shortblock to help that as well, but inthe mean timeI am going to do a gear swap first and jsut need to know RPM's @ 70MPH with what gear and tire size, since that is what I cruise at and most worried about. I sold my Powerstroke Dually and it had 4.10's and it was @ 2500 RPM @ 70 and with a diesel anyhting over 2000 RPMS sucks some serious fuel!!!! So I was hopong that with a 3.73's or 4.10's, @ 70 MPH I could swing in the neighborhood of @ 2100-2200 RPM. Anyone else out there?
08-24-2005, 05:59 PM
#18
TECH Apprentice
Thread Starter
iTrader: (2)
Join Date: Jun 2005
Location: San Marcos, Texas
Posts: 370
Likes: 0
Received 0 Likes
on
0 Posts
Hey guys you won't believe this...
Today I took my truck down the hwy. and at 70mph I'm at 2500 rpms?!? WTF?
And no, I was NOT in 3rd I was in 4th. I have 3.42's it should not be that high, whats going on. I got up to 70 real slow and easy.
Help,
Nick
Today I took my truck down the hwy. and at 70mph I'm at 2500 rpms?!? WTF?
And no, I was NOT in 3rd I was in 4th. I have 3.42's it should not be that high, whats going on. I got up to 70 real slow and easy.
Help,
Nick