3.31 gears at 40,000 lbs gross.
Just to give a bit of a feel for how different gear ratios would behave while towing I locked out 10 then 10th and 9th then added them back again while travelling on a straight stretch of road w...
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Many of you are also forgetting about the tranny gears. 4x truck in reality has a lower overall gear ratio than the F450s shiner had drivetrain issues with.
4x set has granted 3.31 in axle, he has iirc the 10 auto has a 4.54 1st gear. F450, 4.33 axles, and a 3.08 first gear. 4x has approx 100-150 more ft lbs if torque to work with too. Along with he uses 4low pulling the trailer out of the field.
Shiners 450s, if they are rwd, doing local delivery in a city like Seattle, San Francisco with many local roads, granted a block long are in the 15-25+% range, they are probably doing many more 100% throttle starts to move 30-35000 lbs if truck and trailer.
I blew up TH400 auto trans like clockwork every 30,000 miles. Due to the super tall 1st gear in the trans. I had 4.10 gears. Reality, needed 5.xx gears to keep the drivetrain in tack. This is probably the issue with the Allison trans jaraxle mentioned a few posts back, why those trucks are geared too low for freeway driving. First is to talk, so compinsate with a lower axle. Shiners 450s really needed 4.88s for how they were driven, assuming my swag on how they are used us correct.
My new used to me GM 1500 has better towing gears than my 2000 C2500, and it has 4.10 gears too. Like 4x, the low gear is first in trans at 4.1, axle gears 3.42. vs 4.10 in axle, and a 2.48 in trans. Overall low is lower, over all high gear for freeway is taller netting me double the mpg empty, and better the few times towing by 10-20%. With a 4.3L V6 vs a 5.7L V8.
For those thing axle gears are what makes a tow, I've found trans gears can be a BIGGER factor in the how well it does performance wise, how long parts last. GCWR usually means squat! Like my 96 K3500 with a manual blew the doors off the higher rated auto trans equals. Just because you can go 60 mph over the Rockies from Louisiana, you won't stall out in a 20% grade in Seattle. An 18wheeler moving tractor trailer had this issue one time in a housing development I was working in.
I can do more issues I've seen and had too where what you think would be best, us worst!
Marty
4x set has granted 3.31 in axle, he has iirc the 10 auto has a 4.54 1st gear. F450, 4.33 axles, and a 3.08 first gear. 4x has approx 100-150 more ft lbs if torque to work with too. Along with he uses 4low pulling the trailer out of the field.
Shiners 450s, if they are rwd, doing local delivery in a city like Seattle, San Francisco with many local roads, granted a block long are in the 15-25+% range, they are probably doing many more 100% throttle starts to move 30-35000 lbs if truck and trailer.
I blew up TH400 auto trans like clockwork every 30,000 miles. Due to the super tall 1st gear in the trans. I had 4.10 gears. Reality, needed 5.xx gears to keep the drivetrain in tack. This is probably the issue with the Allison trans jaraxle mentioned a few posts back, why those trucks are geared too low for freeway driving. First is to talk, so compinsate with a lower axle. Shiners 450s really needed 4.88s for how they were driven, assuming my swag on how they are used us correct.
My new used to me GM 1500 has better towing gears than my 2000 C2500, and it has 4.10 gears too. Like 4x, the low gear is first in trans at 4.1, axle gears 3.42. vs 4.10 in axle, and a 2.48 in trans. Overall low is lower, over all high gear for freeway is taller netting me double the mpg empty, and better the few times towing by 10-20%. With a 4.3L V6 vs a 5.7L V8.
For those thing axle gears are what makes a tow, I've found trans gears can be a BIGGER factor in the how well it does performance wise, how long parts last. GCWR usually means squat! Like my 96 K3500 with a manual blew the doors off the higher rated auto trans equals. Just because you can go 60 mph over the Rockies from Louisiana, you won't stall out in a 20% grade in Seattle. An 18wheeler moving tractor trailer had this issue one time in a housing development I was working in.
I can do more issues I've seen and had too where what you think would be best, us worst!
Marty
