Will a 4 speed automatic from a '94-'98 Discovery work in a '99-'04 Discovery- if both are 4 speed automatics?

If not, why? and what is the difference?

 

The 94 - 98 D1 use a ZF 4HP22.
The 99 - 04 D2 us a ZF 4HP24.

I am not sure about the electronics in relationship with the two types.

Maybe Disco Mike can shed some light on this subject.

 

how do I reach "disco mike"?

 

From your inbox, you can send discomike a PM.

I am hoping others on the forum can shed some specifics on this conversion.

My question to you is why do you want to do that? What is your situation?

 

I am looking at a '99 Discovery II that needs a transmission, and I found a transmission at our local recycler for a '97 and it's only $300 (versus driving a long distance to get the $700 transmission that came out of a 2000 Discovery II.)

I guess I am just trying to be cheap, eh?

Thanks for your input.

 

While waiting on a transmission expert to reply specifically to your question, check this web site out.

This is an auto recycled parts aggregator in the US. you can see if they show the two units as interchangeable. Try searching by year / model for both and see what comes up.

http://car-part.com/

 

I'm familliar with the link you sent, and upon performing the search, it asks if it is an "SD" or "Series II"- if I choose "SD", it shows parts removed from '94-'99 Discoverys available. If I choose "Series II", it shows parts removed from '99 and up Discoverys.

I wonder if there was some overlap during the production year in '99?

From what I have read in the recent past few minutes, I found the following information:

The 4HP22 is a 4-speed longitudinal automatic transmission for passenger cars from ZF Friedrichshafen AG. Introduced in 1980, it was produced through 2003 and has been used in a variety of cars from BMW, Jaguar, Land Rover, Maserati, Peugeot, Porsche, Lincoln, Austin, and Volvo.

Applications:

* 4HP22
o 1980–1982 Lincoln Continental V8 5.0L
o 1981–1987 BMW E28 528e M20/B27
o 1983–1988 BMW E30 325e M20/B27
o 1983–1985 BMW E28 524td M21/D24
o 1983–1984 BMW E28 533i M30/B32
o 1983–1989 BMW E24 633CSi M30/B32
o 1983–1984 BMW E23 733i M30/B32
o 1984–1985 BMW E30 318i M10/B18
o 1984–1987 BMW E28 535i M30/B34
o 1984–1992 BMW E23 735i M30/B34
o 1986–1992 BMW E30 325i M20/B25
o 1986–1993 Volvo 740 2.3L
o 1986–1991 Volvo 760 2.3L
o 1987–1991 BMW E30 325ix M20/B25
o 1987–1993 Jaguar XJ40 3.6
o 1987–1997 Jaguar XJS 3.6
o 1987–2002 Range Rover 4.0L
o 1987–1996 Peugeot 505 2.0
o 1987–1996 Peugeot 505 2.5
o 1987–1996 Peugeot 505 2.2
o 1987–1989 Peugeot 604 2.5
o 1988–1990 BMW E34 525i M20/B25
o 1988–1993 BMW E34 535i M30/B30
o 1988–1992 BMW E32 735iL M30/B35
o 1988–1997 Maserati Biturbo 2.5 V6
o 1988–1997 Maserati Biturbo 2.8 V6
o 1991–1995 Volvo 940 2.3L
o 1992–1999 Land Rover Discovery 3.9L
o 1997–2002 Austin Tempest 4.0L
o 1999–2003 Land Rover Discovery Series II 4.0L

????!!!! Where is our transmission expert?

 

A D1 tranny will not work in a D2. The D1 is a cable shifting type tranny where the D2 has it's own ECU to regulate shift points.

 

thanks...

 

One thing you must know plowman...the DI is from 1994-1999.5.
The DII, a whole other animal is from 1999.5-2004.
Nothing from a DII will work in a DI and vise versa.
So...you MUST KNOW if the 1999 that you are looking at is a DI or a DII.
If it has a mechanical odometer it is a DI, LCD odometer it is a DII.