[butthead]

With taller tires the speed goes up, just as if lowering the gear ratio to 3.31. KM

 

[havs54]

With taller tires the speed goes up, just as if lowering the gear ratio to 3.31. KM

I gotcha, I just don't want to go the 3.73 route and regret not going 4.10's

Unless I can find an Axle on Facebook Marketplace but even that could be risky regarding the condition of the internals

 

[Floridawombat]

I gotcha, I just don't want to go the 3.73 route and regret not going 4.10's

Unless I can find an Axle on Facebook Marketplace but even that could be risky regarding the condition of the internals

I dont think they offer a 8.8 with 4.10 gearing for our trucks. I will say this their isnt much as for parts for the 8.8hd rear end, i bought ford gears cause they were cheaper than aftermarket and richmond gear was the only company that i could find for a diff bearing and shim kit for the 8.8hd. If your wanting 4.10s and a factory gear set you might have to look diff parts for a mustang which shares the same axle as our truck i believe

 

[Upshifter]

I run 34.5" tires with the 6 speed and 3.55 gears myself, and I can't actually imagine shorter gearing.

2wd Traction can be a handful as it is (though its much improved with the 295mm contact patch vs 275mm I had previously), and I can still easily do under 2 second 60 ft times at the strip in 4wd.

And while that's with the 3.5, it's only pushing around 400hp at the crank, on a very good day.

If it's not a drag truck, I bet 3.73s would work well, and sounds like less of a headache to source & build too.

 

[butthead]

"2wd Traction can be a handful as it is (though its much improved with the 295mm contact patch vs 275mm I had previously), and I can still easily do under 2 second 60 ft times at the strip in 4wd." That's for sure. I'll probably keep the 275's even if they can be toasted. I simply want to keep the weight down yet have enough performance and traction. What I have lacking in traction from a dead start is truly made up in cornering and ride.

"If it's not a drag truck, I bet 3.73s would work well, and sounds like less of a headache to source & build too." That's why I posted my graph. The 3.73 indeed works very well. From the ocaisonal 0-80 blast on an entry ramp to driving on mild boreal forest service roads. I never noticed a big loss in MPG with the 3.73, but it sure adds to the snappy responsiveness. KM

 

[havs54]

"2wd Traction can be a handful as it is (though its much improved with the 295mm contact patch vs 275mm I had previously), and I can still easily do under 2 second 60 ft times at the strip in 4wd." That's for sure. I'll probably keep the 275's even if they can be toasted. I simply want to keep the weight down yet have enough performance and traction. What I have lacking in traction from a dead start is truly made up in cornering and ride.

"If it's not a drag truck, I bet 3.73s would work well, and sounds like less of a headache to source & build too." That's why I posted my graph. The 3.73 indeed works very well. From the ocaisonal 0-80 blast on an entry ramp to driving on mild boreal forest service roads. I never noticed a big loss in MPG with the 3.73, but it sure adds to the snappy responsiveness. KM

I think I'm gonna try and grab a 3.73 take off, appreciate the input guys

 

[FanaticalKilla]

I have 34.5's right now so how would that equate?

GrimmJeeper gearing website is the best for comparing gear ratios and changing anything.

http://www.grimmjeeper.com/gears.html

Transmission code is a 6R80

 

[FanaticalKilla]

Stock vs 3.73 gearing

Stock vs 4.10 gearing

 

[havs54]

Ya that'd be a massive difference going to the 4.10. Is it more common in the 5.0s to go with 4.10 vs 3.73 with 35s due too lower low end torque?

That would make sense because these ecoboosts have so much low end torque

In my research through the years I feel like people always said 4.10s with V8s

 

[Floridawombat]

Ya that'd be a massive difference going to the 4.10. Is it more common in the 5.0s to go with 4.10 vs 3.73 with 35s due too lower low end torque?

That would make sense because these ecoboosts have so much low end torque

In my research through the years I feel like people always said 4.10s with V8s

Back then was different than now, cause back then transmissions had only 4 gears which had different driving characteristics than the new 6 and 10 speed transmissions

 

[TOWMA8R]

Nice looking truck. I still wish I would have got a 2.7.

After seeing what the 2.7 is capable of, I would get one after owning a 3.5

 

[havs54]

After seeing what the 2.7 is capable of, I would get one after owning a 3.5

I'm looking forward to someone pushing this engine with reinforced components. God willingly perhaps It will be me some day if business goes well. Skyline power levels perhaps? Haha

 

[FanaticalKilla]

I'm looking forward to someone pushing this engine with reinforced components. God willingly perhaps It will be me some day if business goes well. Skyline power levels perhaps? Haha

Anything is possible with a well built mill!

 

[havs54]

So I got a quote back from a shop $1700 for the rear end gear swap. Seems a bit high but not insane

I currently have the Super 8.8 3.31 with E-Locker (L3 Axle Code), am I pretty much limited to the Super 8.8 3.73 with E-Locker (L6) if I want a straight swap?

From what I researched a 9.75 swap would require a new driveshaft and potentially losing the parking brake...do all the 15+ trucks have the electric parking brake 8.8 or 9.75?

 

[FanaticalKilla]

I bet with Forscan mods you could retain your parking brake.

 

[Floridawombat]

So I got a quote back from a shop $1700 for the rear end gear swap. Seems a bit high but not insane

I currently have the Super 8.8 3.31 with E-Locker (L3 Axle Code), am I pretty much limited to the Super 8.8 3.73 with E-Locker (L6) if I want a straight swap?

From what I researched a 9.75 swap would require a new driveshaft and potentially losing the parking brake...do all the 15+ trucks have the electric parking brake 8.8 or 9.75?

You can re-gear your truck for about 500 bucks yourself there isnt much to do to get the gears in, i know you in fl where in fl are you?

 

[Floridawombat]

The 9.75 doesnt have the electric parking brake i think

 

[FanaticalKilla]

The 9.75 doesnt have the electric parking brake i think

Mine doesnt

 

[havs54]

You can re-gear your truck for about 500 bucks yourself there isnt much to do to get the gears in, i know you in fl where in fl are you?

Tampa, I've never messed with differentials before but I have done wheel bearings. I may watch some youtube videos and give it a go in a few months. If it's more tedious than difficult I'm ok with that, my father is pretty mechanically inclined as well so that helps

 

[Floridawombat]

Tampa, I've never messed with differentials before but I have done wheel bearings. I may watch some youtube videos and give it a go in a few months. If it's more tedious than difficult I'm ok with that, my father is pretty mechanically inclined as well so that helps

The truck i have is the first truck ive done myself and its easy. All of the thinking work is done for shimming all you gotta do is put the gears in and thats it. The hardest part is getting the pinion nut tight