ZF8HP70 for ZF6HP28 swap?

Jimmy Brooks · Jan 10, 2024

If you can figure out a way to get the ZF8 speed into v8 LR4s you’ll hit the holy grail. The fuel efficiency and acceleration boost for the NA V8 would be so significant. Personally not a fan of the slush box zf6hp26 I have in my 2010, already tore through one and don’t need to tear through another.

ktm525 · Jan 10, 2024

I predict this project will never hit the road but I hope to be proven wrong. Enough talk, turn some wrenches.

Tapps33 · Jan 10, 2024

I’m turning as fast as I can! Although admittedly, it’s turning wires. This is the inside of my 2010. At least I’ve got the antennas swapped and the headliner recovered and installed. I just finished tracing all the different dash pinouts, and now I’m splicing the new radio/amp harness in. Hopefully by Friday or early next week I’ll be testing the “new Bosch” infotainment in my 2010. Once I do that, the. Swap some brake hoses out, it’ll be time for the SC swap. Cause again…I’m under the gun time wise and can’t ship a non-running vehicle…so success must be achieved at ALL costs! (Kinda like this infotainment swap). I’m too far into it…if it doesn’t work, my wife is gonna **** me for screwing her car up!! Not to mention a radio is kinda nice.

Tapps33 · Jan 10, 2024

Although, this brings me back to my original question, has anyone already done this????

I’m blazing enough trails…or at least I hope I’m blazing trails…time will tell. I was really hoping someone else had already “blazed” this trail so I didn’t have to.

ryanjl · Jan 10, 2024

I have not seen anyone who's done any sort of engine or transmission swap that was not just a rebuilt 5.0.

A few years ago, there was a post on here about someone who had LS swapped a RRS, but his was more of a street-oriented car.

I think you'd be the trailblazer.

ktm525 · Jan 10, 2024

Which is why I want to see it done.

Tapps33 · Jan 10, 2024

Just so we’re all clear, I think I’m gonna avoid trailblazing the engine AND the transmission. (Unless someone chimes in who has cracked the transmission swap….or the engine for that matter).

I’n planning on the engine only swap with a trans rebuild. The 8speed swap was just a thought I was toying with. However, right now, keeping the unknowns to a minimum seems like the best practice.

powershift · Jan 10, 2024

Get a baseline dyno run so you can compare them after the swap. I looked for a shop in Vegas to do a 4wheel dyno and found one that did my control arms, but didn't go back since I ran out of time. But it would be interesting to see how much power it puts down to the ground and what the power curve looks like in 4th gear. It would be interesting to compare the 8 speed gear ratios, but these are the 6 speed ratios:

First Gear Ratio 4.17
Second Gear Ratio 2.34
Third Gear Ratio 1.52
Fourth Gear Ratio 1.14
Fifth Gear Ratio 0.87
Sixth Gear Ratio 0.69

Rover Range · Jan 10, 2024

powershift said:
First Gear Ratio 4.17
Second Gear Ratio 2.34
Third Gear Ratio 1.52
Fourth Gear Ratio 1.14
Fifth Gear Ratio 0.87
Sixth Gear Ratio 0.69

8 speed ratios;

Ratio

1st
4.714

2nd
3.143

3rd
2.106

4th
1.667

5th
1.285

6th
1.000

7th
0.839

8th
0.667

Reverse
3.317

Rover Range · Jan 10, 2024

Rover Range said:
8 speed ratios;

Ratio 1st
4.714 2nd
3.143 3rd
2.106 4th
1.667 5th
1.285 6th
1.000 7th
0.839 8th
0.667 Reverse
3.317

6 speed ratios

Ratio

1st
4.171

2nd
2.340

3rd
1.521

4th
1.143

5th
0.867

6th
0.691

Reverse
3.403

ZF8HP70 for ZF6HP28 swap?

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