Wow, this is one crazy thread filled with some wild information.

So, you want to install a 4HP22 transmission from an early DII into an '03 that originally had a 4HP24 transmission. I think that's the case but with all this talk of 'nipples' on '02's and longer driveshafts, VIN's, $300 transmissions shipped and all the rest, it's enough to put me in the weeds!

First, the 4HP24 is a stronger transmission with a larger torque converter. It was used as a better match to the higher output 4.6L engine installed on the '03 and '04. Yes, it is slightly longer than the 4HP22.

Can it be used? Sure. Why? I don't know,laziness? You burnt out one transmission so you went to a junkyard and obviously found a used transmission sitting in a vehicle. The guy in the junkyard has no idea of Rovers, he said it was one thing but you think it might be another. Great! So go to the expense of installing the incorrect transmission from a 14 or 15 year old truck your junkyard clearly knows nothing about and hope for the best.

When buying a major component for your vehicle, you might want to start with the right part. But, that's just me.

 

I would have to agree with Paul, it could be, but why? there has got to be plenty of zf24's out there

 

Jim, the only reasons I can think of why someone would go this route is that they are cheap or too lazy to be bothered to find the correct part. There was a time when 4HP24's were at a premium so they were considerably more expensive than the 4 HP22 but that hasn't been the case for awhile now.

Before I go any further, I want to state, unequivocally, that I am not offering up my opinion in the hopes of selling a transmission.

Look, if you're paying someone to do the install on your Rover, you're looking at somewhere around 10 hours of labor, maybe more. The cost of labor will greatly exceed the cost of the part. Why, in the world, would you go cheap on a part, especially the wrong part?

Now, I love comments like this one from the thread:

"search for a transmission from a 2003 OR a 2004. They are very plentiful and no more than $300 for even a low-mileage unit and that price includes shipping."

No more than $300 with free shipping on a part that weighs over 150 pounds? Maybe a boat anchor but not a part I'd want to be putting into my truck to the tune of a thousand dollars or more.

Also, ALL '03 and '04 DII's were offered in other parts of the world with 4.0L engines and 4 HP22 transmissions. Do we even know where the OP lives?

In the end, if it were me, I'd try to get a part from someone that was reputable, offered some kind of realistic warranty and knew something of the provenance of the truck. If, in the grand scheme of things, acquiring such a part cost me a few hundred dollars more than the magical $300 quoted above, when amortized out, that extra cost becomes inconsequential pretty fast.