Suggested axle gear ratio - Page 2 - Competition Diesel.Com

sled puller · 12-16-2015, 04:53 PM

Ragged75. How do you like the 4.56's. I have a 04.5 common rail that i am wanting to re-gear and am on the fence of 4:10 or 4:56. My truck is 6 speed and i'm wanting to go to pulling 5th on the low side of the t-case. Tired of breaking main shafts pulling 2nd high side.

I think 4:56's sound like the best option. Especially with the new tuning coming out for our trucks and we should be able to turn them a little tighter now.

Ragged75 · 12-29-2015, 12:46 PM

I think they work well.. I too am on the fence about them though, kinda blowing past my peak power and torque curve...was going to try something between 4.10 and 4.56. I had 4.10s and that put me perfectly within my power curve. but that was with 33s..I wanted the bigger tire so went to 456

racedog98 · 04-05-2016, 05:19 PM

Ok , IAM BACK. Did the 4.88 gear change over the off season. Locker in rear and grizzly locker in front. Made first pull of the year. Went to 3rd gear with converter locked. Ran roughly 5000 RPM the entire pull. Is this an indication that may need to go up to 35 inch tires. Thanks in advance for any thoughts.

zstroken · 04-05-2016, 05:33 PM

Post a video, truck may not be hooking very well.

blackedout12V · 04-05-2016, 09:33 PM

Quote:

Originally Posted by zstroken

Post a video, truck may not be hooking very well.

if the truck is hooking well thats a stout 2.5 truck..

ComnRailPwr · 04-06-2016, 06:25 AM

In 2.5 trim that's not stout at all. Theirs no power up there with our turbo limitations. You need to get the truck to hook, get bigger tires or a numerically lower gears.

racedog98 · 04-06-2016, 12:31 PM

In response to zstroken. I'm leaning towards the thought of not hooking up very well. I know first pull with gearing change and may be driving to hard off the line and spinning way too much. Got another pull in a week or so. Probably try tire pressure changes and not as hard off line. With the 3.55 gears , I had learned to leave very hard. But at this point I gotta figure out what works.

TheHammer · 04-06-2016, 12:35 PM

[QUOTE=racedog98;2543473]In response to zstroken. I'm leaning towards the thought of not hooking up very well. I know first pull with gearing change and may be driving to hard off the line and spinning way too much. Got another pull in a week or so. Probably try tire pressure changes and not as hard off line. With the 3.55 gears , I had learned to leave very hard. But at this point I gotta figure out what works.[/QUOTE

by experience, 4.88's will be your best bet.

04-05-2016, 05:33 PM	#24
zstroken Name: zstroken Title: For $$$ your name here Status: Not Here Join Date: Sep 2006 Location: Western Michigan(by the lake) Member`s Gallery Posts: 23,151	Post a video, truck may not be hooking very well. __________________ 2008 4x4 Megacab, 68RFE 97 Dodge gone.... 24V P-Pump Mafia member #1(retired) Thanks to Mumau Diesel, Goerend Transmission, Northeast Diesel Service!

12-16-2015, 04:53 PM	#21
sled puller Name: sled puller Title: Rookie Status: Not Here Join Date: Aug 2014 Member`s Gallery Posts: 3	Ragged75. How do you like the 4.56's. I have a 04.5 common rail that i am wanting to re-gear and am on the fence of 4:10 or 4:56. My truck is 6 speed and i'm wanting to go to pulling 5th on the low side of the t-case. Tired of breaking main shafts pulling 2nd high side. I think 4:56's sound like the best option. Especially with the new tuning coming out for our trucks and we should be able to turn them a little tighter now.

12-29-2015, 12:46 PM	#22
Ragged75 Name: Ragged75 Title: Green Behind the Ears Status: Not Here Join Date: Dec 2011 Location: Medford, WI Member`s Gallery Posts: 51	I think they work well.. I too am on the fence about them though, kinda blowing past my peak power and torque curve...was going to try something between 4.10 and 4.56. I had 4.10s and that put me perfectly within my power curve. but that was with 33s..I wanted the bigger tire so went to 456

04-05-2016, 05:19 PM	#23
racedog98 Name: racedog98 Title: Green Behind the Ears Status: Not Here Join Date: Jan 2013 Member`s Gallery Posts: 51	Ok , IAM BACK. Did the 4.88 gear change over the off season. Locker in rear and grizzly locker in front. Made first pull of the year. Went to 3rd gear with converter locked. Ran roughly 5000 RPM the entire pull. Is this an indication that may need to go up to 35 inch tires. Thanks in advance for any thoughts.

04-06-2016, 06:25 AM	#26
ComnRailPwr Name: ComnRailPwr Title: Too Much Time Status: Not Here Join Date: Jun 2009 Location: Stoutsville , OH Member`s Gallery Posts: 3,293	In 2.5 trim that's not stout at all. Theirs no power up there with our turbo limitations. You need to get the truck to hook, get bigger tires or a numerically lower gears.

04-06-2016, 12:31 PM	#27
racedog98 Name: racedog98 Title: Green Behind the Ears Status: Not Here Join Date: Jan 2013 Member`s Gallery Posts: 51	In response to zstroken. I'm leaning towards the thought of not hooking up very well. I know first pull with gearing change and may be driving to hard off the line and spinning way too much. Got another pull in a week or so. Probably try tire pressure changes and not as hard off line. With the 3.55 gears , I had learned to leave very hard. But at this point I gotta figure out what works.

04-06-2016, 12:35 PM	#28
TheHammer Name: TheHammer Title: broke Status: Not Here Join Date: May 2012 Location: juneau wi Member`s Gallery Posts: 738	[QUOTE=racedog98;2543473]In response to zstroken. I'm leaning towards the thought of not hooking up very well. I know first pull with gearing change and may be driving to hard off the line and spinning way too much. Got another pull in a week or so. Probably try tire pressure changes and not as hard off line. With the 3.55 gears , I had learned to leave very hard. But at this point I gotta figure out what works.[/QUOTE by experience, 4.88's will be your best bet.