Zf Hp422 Eh

[Blitzkrieg Bob]

Anybody know if there is an electrical difference between and 89 and a 90?

Swapped a HP422 from one 535 to another, and now the M & E don't work.

[Ferret]

Anybody know if there is an electrical difference between and 89 and a 90?

Swapped a HP422 from one 535 to another, and now the M & E don't work.

Were they both M/E or was one */E/S ?

Btw, how the hell does M work on these boxes? I've never encountered one yet and was wondering how you force it to change in M?

[BigKriss]

ive never done it but i assume, put in on M, and then move the gear lever as appropriate.

Were they both M/E or was one */E/S ?

Btw, how the hell does M work on these boxes? I've never encountered one yet and was wondering how you force it to change in M?

[Ross]

In my experience with E32s I remember the '89 had M on the button and the '90 did not, perhaps the other way around. Not much I know but there was a difference between the two cars. Perhaps just just how these examples were equipped.

[Blitzkrieg Bob]

In my experience with E32s I remember the '89 had M on the button and the '90 did not, perhaps the other way around. Not much I know but there was a difference between the two cars. Perhaps just just how these examples were equipped.

I think it's M & A, but the dash shows M & E

[Bin_jammin]

I think it's M & A, but the dash shows M & E

I have a 1990 535, I have A & M on the panel, E & M on the dash when I use the switch, and when I pull the shifter down to a lower gear it switches to S.

I've got german alphabet soup.

[e34m30SF]

89's work like this...the switch has 3 positions, up for S, down for E, and toward the rear for S (think sunroof). 90s and up do away with the E because BMW figured everyone wants economy.

For 1989s, if you flick the switch in S, there's a delayed upshift in 1st, 2nd, and 3rd gears. there is no upshift to 4th, even if the lever is in D.

For all cars, if you push it to M, the tranny will start off in 1st, 2nd, or 3rd, and no shifting will occur. Yes, you can go from 0-60 in 3rd gear, but your torque converter won't like you very much. Strange enough, if you have it in M in Drive, it will go to 3rd.

Finally, for 1990+, if you leave the lever in Drive, it's the "new" E(conomy).

Hope that helps...I'm drawing my experience from having owned an 89 and 90 535ia.

[bmwrp8]

dude in S mode there is an upshift to 4th gear... around 6,200rpm before the rev limit...

[Alexlind123]

I have a 1990 535, I have A & M on the panel, E & M on the dash when I use the switch, and when I pull the shifter down to a lower gear it switches to S.

I've got german alphabet soup.

thats how my 1990 535i is.

[Alexlind123]

dude in S mode there is an upshift to 4th gear... around 6,200rpm before the rev limit...

And how fast are you going at that RPM in 3rd?