brute 66 and hybrids

[ghohouston]

I have towed with 3.55's before in a ford and a dodge.. Horrible..

Yeah. If you're hooked to a HEAVY trailer all the time, and arent going above about 60, 4:10's are for you. I can't drive that slow, and don't tow that heavy ever. There is absolutely no reason to be turning 3,000 rpm's on the highway. My 02 model I had would run right at 2,200 rpm's at 80mph with stock tires and wheels, 3:73's and a 4r100. That was PERFECT.

 

[blackcloudpsd03]

You also Dont want to be towing that fast either.. I do a lot of in town driving and towing arround town. That's why I like 4.10's

I was in my buddies 96 with 3.55's on 33's towing his 23ft sea ox. Its got take off power but when it shifts into od (2100-2200rpm) it drops to 1300. And lugs it. Highway speeds.. The egts get to high ( not spooling up completely) take it out of od egts go down but he's screaming the R's and on a hot south fl day the engine temp creeps up

 

[blackcloudpsd03]

Now he's on 35's an he is going to put a set of 4.56's in

 

[TyCorr]

You wanna talk about "screaming the r's", my truck in sig has 4:10's. I live in Texas, highways speed is pretty much 80 everywhere you go. At 80 mph with 4:10's and a zf5, my truck is at 3,000 rpm's. I would trade those gears for 3:55's in a heartbeat.

I like how everyone thinks they need 1990s gears in their diesel trucks. It cracks me up. I tow shiz all over on trucks with 3.73s. It's ludicrous in anything over 400hp to be running anything beyond a 3.73 especially with stock tires.

I remember my 7.3 screaming at 75 with stock tires and 3.73 towing. A 35" tire, 400+ hp, and 3.73s is a match made in heaven to yank shti down the Boulevard.

 

[TyCorr]

You also Dont want to be towing that fast either.. I do a lot of in town driving and towing arround town. That's why I like 4.10's

I was in my buddies 96 with 3.55's on 33's towing his 23ft sea ox. Its got take off power but when it shifts into od (2100-2200rpm) it drops to 1300. And lugs it. Highway speeds.. The egts get to high ( not spooling up completely) take it out of od egts go down but he's screaming the R's and on a hot south fl day the engine temp creeps up

That's nice. Too bad it's unrealistic towing conditions for most of us. We run 80 up here towing trailers. In stock trucks with 3.73 and stock tires. 34" tall...how is that possible? We should be lugging the he'll out of our motors.

If that obs with 3.55s had the stock, dinky tires on it, it would be towing just fine at 65.

 

[lincolnlocker]

must have live tunes if you are gonna run that combo!

live life full throttle

 

[Jason]

I'm with Ty. I don't have 400hp, but my reg cab 2wd has 3.73's, and 34.2" tall michelins...and it tows great. 75 is about 2k, it's much happier towing at highway speeds. My old crewcab towed it's ass off on 35's with 3.73s. It never lugged, but a big hill that would make it drop a gear, I would just lock out od, set the pyro at 1200 degrees on matt's tunes, and climb it at 75mph. It was turning 2600rpm, and pulled like a banshee. I grossed 32k lbs with that setup, and never once wished I had more gear. I gotta laugh at the guys who regear with 35's. No damn reason.

 

[TyCorr]

Usually guys with way more powerful trucks than tuned 7.3s. Cracks me up. I can't imagine 4.30s and listening to a frikkin motor screaming trying to cruise 75 :doh:

 

[ghohouston]

I like how everyone thinks they need 1990s gears in their diesel trucks. It cracks me up. I tow shiz all over on trucks with 3.73s. It's ludicrous in anything over 400hp to be running anything beyond a 3.73 especially with stock tires.

I remember my 7.3 screaming at 75 with stock tires and 3.73 towing. A 35" tire, 400+ hp, and 3.73s is a match made in heaven to yank shti down the Boulevard.

I want to get a set of 3:55's and stock obs Alcoas under my truck soooo bad! Im having to DD it for a few weeks till I get my new service truck from work, and it gets OLD!

 

[gnxtc2]

I have no issues towing 23k with 3.55s on 285s (33") in OD doing 70. I have to drop into 3rd on the very long steeps hills because I'm passing slow cars and get hung up in slow moving traffic.

Billy T.
[email protected]

 

[TyCorr]

That sounds more like it. I remember mine winding hard to run 80 when it was stock.

 

[jeremiahmercier]

Like I said, the right combination of injectors, turbo and tuning and the 3.55s work very well. I never wish I had steeper gears, if anything, I'd lower rpms even more

 

[TyCorr]

An auto would be better then.

 

[lincolnlocker]

An auto would be better then.

for what?

live life full throttle

 

[jeremiahmercier]

Like I said, the right combination of injectors, turbo and tuning and the 3.55s work very well. I never wish I had steeper gears, if anything, I'd lower rpms even more

An auto would be better then.

Yep, I'm planning on swapping in a 4r100 SD pcm at some point

 

[TyCorr]

for what?

live life full throttle

The person that it was directed at understood my point and even agrees.

 

[lincolnlocker]

The person that it was directed at understood my point and even agrees.

i wasnt asking if the person directed at understood.. i was asking why it would be better to got to an auto? if it is to lower rpm and thats it then its not much of a jump..
final drive ratios
zf5 - .77
zf6 - .72
4r - .71

dont see it being cost affective...

live life full throttle

 

[Swaan]

It will drop rpm about 185 rpm at 60 mph. Going from zf5 to e4od.

I've done both and much prefer my zf5 for towing.

 

[TyCorr]

The fact that a torque converter splits gears infinitely was more my point. That Makes A Huge Difference. You can unlock a converter in final drive and increase speed and relock.

Manuals don't support two seconds of slip to increase rpms, boost, and speed. You have to lug or downshift.

 

[TyCorr]

It will drop rpm about 185 rpm at 60 mph. Going from zf5 to e4od.

I've done both and much prefer my zf5 for towing.

I respect your desire but funk that dude. No way. My 460 would chew the synchro out of those pos, can imagine a diesel with 400 honest rwhp..that's about 3 times the rwhp of the 460. Torque? 5 times.