Mid-life-crisis · Dec 21, 2020

The low shift button on my L322 doesn't work. There's no light on the dash or anything, so I'm trying to track the electrics.
Apparently there are 2 types of gearbox GM5 and ZF
How do I tell which I have?

marjon · Dec 21, 2020

If you said what year and engine peeps maybe able to help.

8 speed box?

J

RangeRoller dt · Dec 21, 2020

Best way is as stated in thread no1 on the RR section

Let us know Manufacturer Year, model, engine and presuming it’s standard someone will have answer

Mid-life-crisis · Dec 21, 2020

marjon said:
If you said what year and engine peeps maybe able to help.

8 speed box?

J

Aaaah, sorry
2002 think its 5 speed

Mid-life-crisis · Dec 21, 2020

Mid-life-crisis said:
Aaaah, sorry
2002 think its 5 speed

3.0l diesel

RangeRoller dt · Dec 21, 2020

Most likely the GM box. Worst of the lot I’m afraid. Metal it’s made of is often compared to the consistency of hard cheese but okay if new.

Henry_b · Dec 21, 2020

3.0 diseasel with the 5spd GM box

A match made on Tinder, or hell maybe heaven..

Depends..

brianp38dse · Dec 21, 2020

Check for blown fuse the low shift motor is in the transfer box and often seizes due to lack of use.

Mid-life-crisis · Dec 21, 2020

brianp38dse said:
Check for blown fuse the low shift motor is in the transfer box and often seizes due to lack of use.

Thanks
The wiring diagram shows P145 is a fuse holder rated 50A
Presume it's somewhere near the battery.
Is that the one?

brianp38dse · Dec 21, 2020

Your guess is as good as mine as i am not up to speed on l322 wiring but recall problems with the shift motor, i believe it can be taken of and checked on the bench.

stuu · Dec 21, 2020

If you press the button while in D. Does it ask you to select neutral?
If no possible button.
If yes but no buzz from under the motor check for voltage there if so the high/low motor on the back of transferbox needs investigating.

Mid-life-crisis · Dec 21, 2020

No, if I select when in drive it doesn't do anything and doesn't say to select neutral.
I've also tried it in neutral with my foot on the brake and it does absolutely nothing. No lights no sounds no nothing.

aj1954 · Dec 21, 2020

Henry_b said:
3.0 diseasel with the 5spd GM box

A match made on Tinder, or hell maybe heaven..

Depends..

Which is best engine/box match in your opinion?
reason I ask is I'm toying with the idea of getting an L322, can't decide whether to get a 4.2SC
or 5.0SC.

stuu · Dec 22, 2020

Mid-life-crisis said:
No, if I select when in drive it doesn't do anything and doesn't say to select neutral.
I've also tried it in neutral with my foot on the brake and it does absolutely nothing. No lights no sounds no nothing.

Sounds like the switch may be dead does your hdc button to the left of it work?

Mid-life-crisis · Dec 22, 2020

The button seems to work ok but I dont know if HDC itself vunctions or not

Bix · Dec 22, 2020

RangeRoller dt said:
Most likely the GM box. Worst of the lot I’m afraid. Metal it’s made of is often compared to the consistency of hard cheese but okay if new.

The GB was fine in the much lighter X5, unfortunately the girth of the L322 was too much, coupled with "seal for life", it was a death sentence from the factory.

Henry_b · Dec 22, 2020

Bix said:
The GB was fine in the much lighter X5, unfortunately the girth of the L322 was too much, coupled with "seal for life", it was a death sentence from the factory.

It was a common failure point int eh X5 too

Henry_b · Dec 22, 2020

aj1954 said:
Which is best engine/box match in your opinion?
reason I ask is I'm toying with the idea of getting an L322, can't decide whether to get a 4.2SC
or 5.0SC.

My personal favourite is the 4.2S/C with the 6spd 6hp26 ZF box a pretty bombproof combo
The 5.0's aren't that bad if they've been looked after.

The chain guides fitted on these engines it's just a matter of time before they need doing. Other then the chain guides there's not much that goes wrong with the 5.0's. Well, the Supercharger torsion isolator wears but they're easy enough and cheap enough to repair yourself
The upside of one of them over the 4.2 is the 25% increase in power, sharper throttle response, and better economy along with the more modern interior and 6 piston brakes.

But the Former tends to be more reliable in the long run.

RangeRoller dt · Dec 22, 2020

They seem to be okay in an L322 until they age.
What’s the life expectancy of a GM unit in an 3.0d straight 6? - 80,000m? Not particularly robust but one new box should see most owners through

aj1954 · Dec 22, 2020

Henry_b said:
My personal favourite is the 4.2S/C with the 6spd 6hp26 ZF box a pretty bombproof combo
The 5.0's aren't that bad if they've been looked after.

The chain guides fitted on these engines it's just a matter of time before they need doing. Other then the chain guides there's not much that goes wrong with the 5.0's. Well, the Supercharger torsion isolator wears but they're easy enough and cheap enough to repair yourself
The upside of one of them over the 4.2 is the 25% increase in power, sharper throttle response, and better economy along with the more modern interior and 6 piston brakes.

But the Former tends to be more reliable in the long run.

Thanks Henry, some positive comments which, I was hoping for

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