Question boîte, similitudes 5HP24 vs 5HP30?

[christophe_autos]

Bonjour,

 

Est-il possible d'adapter une boite 5HP30 à la place d'une 5HP24?

 

Je vous explique mon S8 a une 5HP24 de 3000000 kms et j'ai gardé la boite 5HP30 de mon ex 740i E38. Est-ce possible de la mettre sur la S8?

 

Ou récupérer le valve body de 5HP30 pour mettre sur la 5HP24?

[christophe_autos]

Une piste interessante!

 

"What's the difference between 5HP30 & 5HP24 trans?

 

I have noticed several sites that list the transmission fluids for the

different model BMW/GM transmissions, show a 5HP30 (A5S 560Z) transmission

used in the earlier E38 (740 & 750) and a different model, 5HP24 (A5S 440Z)

for the '96 & later 740's. However the 750's still used the 5HP30 till the

end of that model E38 (2002). The specs show the earlier transmission

holding 13.1 litres, where the 5HP24 (4.4L) only holds 9 litres. Was the

5HP30 a 'heavier duty' transmission or what? Can anyone shed any light on

this for me?

 

- ---------------

They are both ZF 5 speed automatic transmissions.

 

The 5HP30 is the ZF designation, and the A5S 560Z is the BMW designation for

the same unit.

 

The designation letters are defined as follows

 

ZF designation: 5(speeds); H(hydraulic control); P(planetary gear train); 24

(model)

 

BMW designation: A(automatic); 5(speeds); S(overdrive); 560(max torque in

NM); Z(ZF manufacturer).

 

 

I will use the BMW designations.

 

The A5S 560Z was essentially replaced by the A5S 440Z starting in early 96

and was introduced to all models on a gradual basis. The transition for the

5 series was in January 97. The E38 740 got the new transmission with the

move to engine change (M60 > M62). The exception, as you mention, was the

750 were the 560 transmission was retained to deal with the higher torque of

that engine.

 

The newer version (A5S 440Z) is a technically updated unit that was

developed mainly for weight and fuel saving.

 

The main differences between them are:

- - 440 is lighter by about 50 lbs. (complete redesign - I do not have the

internal details)

- - smaller unit of a slightly different shape.

- - 440 only has a primary oil pump (no flow with engine off) therefore towing

speeds must be restricted.

- - different electronics. The 440 can be "flash" updated while the 560 can

not.

- - use of different transmission fluid and capacity.

 

But the primary difference it the torque handling capacity. The new

"lighter" 440 unit can only handle 440nm compared to the older 560nm

capacity. This is not a problem however because the engine computer was

changed so that the engine torque output is reduced slightly during each

gear change. Thus the transmission never receives the full engine output

until the gear change is complete. Since gear changes cause the torque loads

to peak in the transmission this momentary reduction can save the need for

such a heavy transmission design.

 

Hope that helps.

 

Cheers"

Jim Cash

[christophe_autos]

"La transmission sont de longueur différente, la 5hp30 est plus longue que la 5HP24 donc vous avez besoin d'un nouvel arbre de transmission.

Also the Transmission control module is different and you would have to rewire the x8600 connector to match (not a small feat)

De plus, le module de commande de transmission est différent et vous auriez à recâbler le connecteur X8600 pour correspondre (pas un mince exploit)"

[christophe_autos]

"Yes it is possible, no its not worth the trouble.....

It would be a massive undertaking from a wire harness swap. Better to just upgrade the stock unit.

5hp30 is a longer transmission which means you'd have to change the drive shaft to, there's different harness, EGS module, and DS."

Modifié 28 mai 2013 par christophe_autos