what autobox is it

[disco-v8]

ok what automatic box do the rangerovers use????

another words what code is it???

cheers

[RichardRRC]

It's a ZF4 HP22 on later models of the classic :)

[lornieg]

The earlier RR had the 3 speed Chrysler Torueflight gearbox (727).

G.

[Range Rover Blues]

It's a ZF4 HP22 on later models of the classic :)

ANd the only auto I like to drive.

Anyone know if different models were set up differently?  ie 3.9 vs 4.2 etc? TDi should be lower reving obviously.

[disco-v8]

im nearly 100% sure that the disco1 3.9 EFI and disco2 4.0 use the same box and torque converter

on the other other sized engines the box is the same but the only difference is that the torque converters are smaller, and that the 3.9's are usualy none electric boxes but some of the other range are electric (something like that)


im not sure about the TDI tho, but it wud make sense for this to be sltly different as there is more low down torque


what about the early 3.5 auto boxes what code are these as im after a replacement for mine.......


ive also read that the zf 4hp22 box is only rated at about 260ft lb but the early 3 speed boxes that where designed for the buick engines could stand upto 1000ft lb (about).......

so another question is???? will this 3 speed fit my engine????

[Range Rover Blues]

The electric would be noce to have, you could make it flappy shift :)

This might be the differecne I'd heard about but I wondered if the 3.9 and 4.2 boxes were the same as I'm wondering which to fit.

[RichardRRC]

The 4.6 P38a had a ZF4 HP24 auto in it, to help handle the extra torque.
The 4.2 in my cobra has 285.5 ftlb @ 4100 rpm and 300 bhp @ 6500 the adjustable cam timing is set to "standard",  so I would think to break an auto in a 3.9 it would have to be tuned. Standard torque in a 3.9 auto RRC was about 231 lbft @ 2600 rpm.
The electronically controlled ZF4 HP22 in my TD5 DII is happy with 193 bhp it receives  :D . But the electronics need "thinking time" compared to the D1/RRC version. :roll: :)
I've got a spare auto box out of a 4.2 RRC if it's any good to anybody (complete with BW transfer box) :)

[Range Rover Blues]

I've got a 4.6 with an LSE auto to fit this summer, it's obvioulsy ok as it came out of the same car and was running fine, but my LSE is 5.0L and I'm guessing tuned too, it goes like stink but the 'box might have been tinkered with too as it revs harder than a standard 3.9.

I was wondering if the 3.0 and 4.2 boxes were the same or not, because if one lets the engine rev more that's the one I'll fit :D