4x4 drivetrain limits; real world experiences?

[GeauxinUp]

I’m in the early stages of planning a 4th gen RCSB 4wd street build and trying to get realistic expectations on drivetrain limits outside of the engine and transmission (those are already planned).

Target is ~850–900whp on a turbo 6.2 setup.

I’m specifically trying to gather real-world info on:
• Front and rear differential strength
• Front CV/half shaft limits
• Transfer case (BW 44-45) durability under load
• Driveshaft limits (front + rear)
• Any known weak points in the 4x4 system at higher power

Would really like to hear from anyone who has actually:
• Run boosted setups in 4x4
• Launched on sticky tires
• Broken parts (what failed first, and at what power level?)

Also curious what people have upgraded vs left stock and how it held up.

Trying to keep it streetable (but will see some track time I'm sure), not a full race setup.

Appreciate any insight!

 

[Wild one]

You're on the wrong page,you want to be on the Hi-po facebook pages like Tuned Rams /High Performance Rams.
800 crank is do-able,but 900 rwhp is gonna cost you a $h!tload of money.You'll probably want to look into a 9" rear diff swap as there's not much available for the ZF diffs.
There's not much differance in the 6.2 block and the 6.4 block,they're both BGE blocks,you could start with any truck 6.4 block, with a valve and spring change it basically has Hellcat heads with a N/A intake manifold bolt pattern.
A 6.4 done up as a 411 is a fairly common platform.
The 44-44 supposedly will live up to about the 800 crank level,but at 900 rwhp is probably going to start giving you issues.
Get ahold of Jon Sipple to build you a 8HP70 to handle the power,and see what he reconmends you do with the transfer case.
The front diff i don't know if it'd live at 900rwhp or not.
I know Matt Fikac had well over $50,000 into his old truck,and that was several years ago,so you're probably looking at the same amount of money or more now.
You better have really deep pockets to build what you want and have some sort of reliability,as you're not gonna throw something like that together with cheap parts and expect it to live.
A back halved 2wd truck might be cheaper and easier to build,plus it'll have alot less parts to break or beef up

 

[GeauxinUp]

You're on the wrong page,you want to be on the Hi-po facebook pages like Tuned Rams /High Performance Rams.
800 crank is do-able,but 900 rwhp is gonna cost you a $h!tload of money.You'll probably want to look into a 9" rear diff swap as there's not much available for the ZF diffs.
There's not much differance in the 6.2 block and the 6.4 block,they're both BGE blocks,you could start with any truck 6.4 block, with a valve and spring change it basically has Hellcat heads with a N/A intake manifold bolt pattern.
A 6.4 done up as a 411 is a fairly common platform.
The 44-44 supposedly will live up to about the 800 crank level,but at 900 rwhp is probably going to start giving you issues.
Get ahold of Jon Sipple to build you a 8HP70 to handle the power,and see what he reconmends you do with the transfer case.
The front diff i don't know if it'd live at 900rwhp or not.
I know Matt Fikac had well over $50,000 into his old truck,and that was several years ago,so you're probably looking at the same amount of money or more now.
You better have really deep pockets to build what you want and have some sort of reliability,as you're not gonna throw something like that together with cheap parts and expect it to live.
A back halved 2wd truck might be cheaper and easier to build,plus it'll have alot less parts to break or beef up

Those are public groups, and I don’t like all these nosy f’ers around here knowing my business

I’ll be running an 80/89 turbo (Walker Induction) setup on a factory 6.2 H.O. long block, MMX double pump, whatever size injectors I’ll need, Sipple trans. All of that adds up to around $20k, there’s no way I’ll be even close to $50k, maybe half that.

Surprised to hear the clutches in the 44-44 can hold that much power. I’m planning on going with the 45, to avoid the clutches.

I’m not planning on just throwing some cheap **** together, hence the reason of being on here planning it all out.

 

[Wild one]

Those are public groups, and I don’t like all these nosy f’ers around here knowing my business

I’ll be running an 80/89 turbo (Walker Induction) setup on a factory 6.2 H.O. long block, MMX double pump, whatever size injectors I’ll need, Sipple trans. All of that adds up to around $20k, there’s no way I’ll be even close to $50k, maybe half that.

Surprised to hear the clutches in the 44-44 can hold that much power. I’m planning on going with the 45, to avoid the clutches.

I’m not planning on just throwing some cheap **** together, hence the reason of being on here planning it all out.

You'll find more fast guys on the facebook pages then on here,but if you've found John Sipple and Mike Walker,you're better off talking to them,then anybody on here or on facebook. Ask John what he reconmends you do for the t-case,and Mike will tell you what you should be doing to the engine to keep it alive and happy
I'm just going by what Matt Fikac of Moes said he had into his truck,so if you think he was out to lunch on what it cost him,take it up with him,not me,i'm just relaying what he said.
You'll probably want want to look into doing drop in rods and pistons into that 6.2 block if you want it to last for any length of time,as 900rwhp is pushing the stock Hellcat parts. 900 at the tire is gonna be 1,000 or more at the crank

 

[GeauxinUp]

You'll find more fast guys on the facebook pages then on here,but if you've found John Sipple and Mike Walker,you're better off talking to them,then anybody on here or on facebook. Ask John what he reconmends you do for the t-case,and Mike will tell you what you should be doing to the engine to keep it alive and happy
I'm just going by what Matt Fikac of Moes said he had into his truck,so if you think he was out to lunch on what it cost him,take it up with him,not me,i'm just relaying what he said.
You'll probably want want to look into doing drop in rods and pistons into that 6.2 block if you want it to last for any length of time,as 900rwhp is pushing the stock Hellcat parts. 900 at the tire is gonna be 1,000 or more at the crank

Thanks for the info. I’ve spoken to HHP and they said I’d be fine. This is the Demon 6.2 btw.
I’ll reach out to Sipple about the t-case

6.2L H.O. long block

 

[GeauxinUp]

You're on the wrong page,you want to be on the Hi-po facebook pages like Tuned Rams /High Performance Rams.
800 crank is do-able,but 900 rwhp is gonna cost you a $h!tload of money.You'll probably want to look into a 9" rear diff swap as there's not much available for the ZF diffs.
There's not much differance in the 6.2 block and the 6.4 block,they're both BGE blocks,you could start with any truck 6.4 block, with a valve and spring change it basically has Hellcat heads with a N/A intake manifold bolt pattern.
A 6.4 done up as a 411 is a fairly common platform.
The 44-44 supposedly will live up to about the 800 crank level,but at 900 rwhp is probably going to start giving you issues.
Get ahold of Jon Sipple to build you a 8HP70 to handle the power,and see what he reconmends you do with the transfer case.
The front diff i don't know if it'd live at 900rwhp or not.
I know Matt Fikac had well over $50,000 into his old truck,and that was several years ago,so you're probably looking at the same amount of money or more now.
You better have really deep pockets to build what you want and have some sort of reliability,as you're not gonna throw something like that together with cheap parts and expect it to live.
A back halved 2wd truck might be cheaper and easier to build,plus it'll have alot less parts to break or beef up

Btw...wait until you see what Matt is planning with his current build. If you thought the last one was expensive......

 

[GeauxinUp]

You'll find more fast guys on the facebook pages then on here,but if you've found John Sipple and Mike Walker,you're better off talking to them,then anybody on here or on facebook. Ask John what he reconmends you do for the t-case,and Mike will tell you what you should be doing to the engine to keep it alive and happy
I'm just going by what Matt Fikac of Moes said he had into his truck,so if you think he was out to lunch on what it cost him,take it up with him,not me,i'm just relaying what he said.
You'll probably want want to look into doing drop in rods and pistons into that 6.2 block if you want it to last for any length of time,as 900rwhp is pushing the stock Hellcat parts. 900 at the tire is gonna be 1,000 or more at the crank

Found an engine I think you'll be proud of...haha
I'll post it up when the deal is done!

 

[GeauxinUp]

@Wild one

2.4K views · 100 reactions | You don’t have to believe me, but the money don’t lie @zilla_1320 put in the work on this motor for 3 years and now it’s off to a new home. Can’t wait to see how it performs in the next one. | Baily's Hyperformance

You don’t have to believe me, but the money don’t lie @zilla_1320 put in the work on this motor for 3 years and now it’s off to a new home. Can’t wait to see how it performs in the next one.

www.facebook.com

 

[Wild one]

@Wild one

2.4K views · 100 reactions | You don’t have to believe me, but the money don’t lie @zilla_1320 put in the work on this motor for 3 years and now it’s off to a new home. Can’t wait to see how it performs in the next one. | Baily's Hyperformance

You don’t have to believe me, but the money don’t lie @zilla_1320 put in the work on this motor for 3 years and now it’s off to a new home. Can’t wait to see how it performs in the next one.

www.facebook.com

View attachment 583873View attachment 583874

Well you can't say it's not broke in,as that engine is famous What are you hanging off it for boost? Personally i'd get ahold of Mike Anthony Walker and talk to him about one of his turbo set-ups

 

[Pushrod8Speed]

Might try KodiakTrucks.com owner for t-case hp capability numbers

 

[GeauxinUp]

Well you can't say it's not broke in,as that engine is famous What are you hanging off it for boost? Personally i'd get ahold of Mike Anthony Walker and talk to him about one of his turbo set-ups

Twin 58’s

 

[Wild one]

Twin 58’s

The weak link is going to be your axles if you stick with stock ZF axles in the rear diff