Engine/Transmission (1998.5 - 2002) Those with 4.10 gears

[Brand-X]

I have been considering switching to 3. 55s for some time I am wondering if I might be ok just swapping to 35 inch tires. With my mods it gets to 100 very fast but I think I need more it just red lines to fast. ... what do you run for rpms on the hiway thanks George

 

[CollinsR]

at 70mph with 285's I'm turning 2100rpms and 60mph is just shy of 2000rpms... .



Rick

 

[Cooker]

If I were in your situation I would probably just run larger tires, assuming you want to go to larger tires.



If you are looking for more RPM, couldn't you run a RAD?



Also, since you are used to how your truck responds now, I don't think you will like the bottom end with 3. 55's, a tight converter, and a SPS62. It is be coniderably more laggy where as not you probably do not have much lag.

 

[SMoules]

I dont think I could get rid of my 4. 10's. Considering how fun it is to drive around town with 33x12. 5's and a sps 62. Very minimal lag if any. Never had the 3. 55's and I don't think I would want to after being used to what I have now. Just my opinion.

 

[dmhollister]

Concure will CollinsR about RPMS. But at 80 My RPMS were a touch above 2400. Did notice a big difference in RPMS when switching to 285 from 265.

 

[Brand-X]

My buddy has 355s and 285 complains about low end all the time I thought it was just because he only has a ez box. He has 285s on his truck I will swap with him I would like to try 315s also I will look for a set to try... thanks George

 

[Nate]

4. 10s and 35s are a good match.



I had 3. 55s and it sucked pulling a trailer.



2000rpm = 73mph.

 

[RHuot]

snow pro

Can you please explain the comment it sucked towing a trailer? Did you have to down shift more often when pulling the hills? Was is it a dog and not able to make the hills in a reasonable time? I just want to get a feel for the 3:55's. I am looking to change from the 3:73 but I can't go with tire option you were discussing.

 

[Bob4x4]

Can you please explain the comment it sucked towing a trailer? Did you have to down shift more often when pulling the hills? Was is it a dog and not able to make the hills in a reasonable time? I just want to get a feel for the 3:55's. I am looking to change from the 3:73 but I can't go with tire option you were discussing.

I have 3. 54's on my 94,(with 35" tires)it has a ton of torque so it will do what I ask but on the big grades I have to do about 75 mph to keep the egts in check while towing. The 05 has a bit less torque. 4. 10's with 35's and is easier to keep closer to the speed limit when doing the grades.



Bob

 

[GOT-Torque]

I'm running 3. 55's and 35" tires. 60 mph is around 1500 rpm and 80 mph is somewhere around 2000 rpm. I don't tow hardly at all. I guess it depends on what you use your truck for and how far you have bombed it. If you tow alot, numerically higher gears and/or smaller tires will keep each gear closer together (not so much rpm drop between gears). The more hp you have, the less of a issue the lower gear ratio becomes (as long as you aren't always lugging the engine and you can stay on top of the turbo easily).

 

[TWilkening]

It's a shame you aren't close and wanted to swap, I would like 4. 10s in my truck.

 

[PRattenbury]

I'll be going to 4. 10's as soon as my credit cards cool off from the engine work I'm doing now. I'm running 35's and an auto.

 

[Warpig]

Man, who wouldn't want 4. 10's with oversized tires!!! I have 4. 10's with slightly oversized tires 285's and the combo is perfect!!!

 

[Cooker]

I have had both 3. 55's and 4. 10's and both trucks were autos. I prefer 3. 55's and FWIW I am running 285 tires on my 3. 55 geared truck.

 

[Warpig]

It all boils down to personal preference.

 

[Brand-X]

I will be trying my buddys 285s as soon as I get the truck back from Mass Diesel I will probably keep them until I return from FL in March I promise not to spin them ... George

 

[VolsFan]

I've got 4. 10 rear in my 99, I was running 285/75/16's on the stock chrome plated steel rims, and finally swapped them for Mickey Thompson 16x8 Classic II's which are the perfect rim for a 285, the stockers were only 16x6 1/2" I couldn't be more happy with how much nicer the truck handles and the smoother ride