noob question

[Kyle_T]

Are all LR zf 4hp22, 22E, 24E ratios the same regardless of what motor they are behind? (IE v8, td5, 300tdi...)

edit, the non elec versions have different valve body tunes, and the elec td5 vs v8 has a different TCM which shifts differently, right?

[Nevada Ben]

I think all the ZF 4 HP-22 and ZF4 HP-24's in Land Rovers (Range Rover, Defender, and Discovery), regardless of the engine, have the same ratios. The ratios in other makes (Peugeot, Pinzgauer, Volvo, Jaguar, Maserati etc.) may differ but I was not able to find one that did. The BMW's for example are the same as Land Rover versions.

Land Rover accomodated differences in engines (MFI, 300TDI, V8 etc.) using different high range ratios in the LT230 transfercase. The LT230 low-range from Land Rover is always the same.

[Nevada Ben]

This document indicates Volvo had different ratios: http://apps.volvocars.us/ownersdocs/...o/85740_08.htm

This thread also indicates the Pinzgauer used those ratios:

http://www.pirate4x4.com/forum/showt...7846LyslTsAw==

[Puffdragon]

Originally Posted by Nevada Ben

Land Rover accomodated differences in engines (MFI, 300TDI, V8 etc.) using different high range ratios in the LT230 transfercase. The LT230 low-range from Land Rover is always the same.

LR used different valve bodies for all engine options.

[Kyle_T]

i dont care about volvos or bmw's...

and i need an absolute, not an I think....

thanks KC. so the TD5 vs v8 is a different valve body? (22E/24E)

[Puffdragon]

Originally Posted by Kyle_T

i dont care about volvos or bmw's...

and i need an absolute, not an I think....

thanks KC. so the TD5 vs v8 is a different valve body? (22E/24E)

Yes, the valve body changes the shift point's. Otherwise the diesel would over rev as well as it would have poor acceleration and fuel consumption. It has been said that the valve bodies will work on either engine just fine, but I cannot confirm or deny this.

The volvo zf comes in many breeds with several different gear options. As do many other zf's found in non rover applications. But, non of them generally have the lower 1st gear of the rover box.

[Kyle_T]

Originally Posted by Puffdragon

Yes, the valve body changes the shift point's. Otherwise the diesel would over rev as well as it would have poor acceleration and fuel consumption. It has been said that the valve bodies will work on either engine just fine, but I cannot confirm or deny this.

ok, ill have to dig around some more. i was under the impression that the TC and the TCM were the only differences... but we dont have td5's here so....

[Puffdragon]

Sorry, gotta back up a bit. I wasn't really paying attention. Now the electronic controlled 4H tranny might be a bit different. I would assume that the comp will control the shift points so that would make me think that the trannies are basically the same.

So I think you are right in this case.

My mind gets stuck on the manual valve bodied 4H and I the electronic version never really comes to mind.

I personally prefer the manuals.

[PTSchram]

Originally Posted by Puffdragon

Sorry, gotta back up a bit. I wasn't really paying attention. Now the electronic controlled 4H tranny might be a bit different. I would assume that the comp will control the shift points so that would make me think that the trannies are basically the same.

So I think you are right in this case.

My mind gets stuck on the manual valve bodied 4H and I the electronic version never really comes to mind.

I personally prefer the manuals.

Damn you KC, I thought I had a chance to correct you

[Puffdragon]

Sorry PT. When I'm wrong, I'm wrong and I usually figure it out within a minute or two, then it's time to correct myself. At least I'm not one of those pussies that goes back and corrects the first post like I never screwed up in the first place.

Maybe you can get me next time PT.