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[ferretjuggler]

Right.
Could I use any of the auto transmissions from ZJs or WJs in any of my CJs or FSJs

ZJs are starting to fall to scrap value like XJs were a few years back, the transmissions are going for pennies (and a few WJ ones too)

My basic motivation for such lunacy is to find something (hopefully) with a lock up torque converter, so I can have an auto trans without crippling fuel bills.

[Bulldog67]

lets hope so

[dieselj20]

take a look at this site http://www.stu-offroad.com/engine/aw-4b/aw-4b-1.htm

[ferretjuggler]

Cheers Andy
FFS that guy has really made that a labour of love ain't he
I think I'd have just bought the TF999 out of a junkyard JY and lived with 3 speeds instead.

Does an AW4 have a lockup torque converter?
I've been googling it and there seems to be contradicting information on the net

[Panic mechanic!]

You are going to need the whole engine/tranmission system ( and all associated wiring looms and fuse boxes etc) as a unit to fit it into anything as the  the trannies uses sensors on the engine to control shifts.You may even have to go as fas as changing the fuel tank to get it all to work and run new high pressure fuel lines etc .

[isle of man]

TH400!!

[ferretjuggler]

Well you'd better tell that to the guys on the IFSJA 'cos they have managed to get AW4's to work behind carburettored 360's.

Some of the conversions have gone semi-auto, with manual selection of the ratios via a dash mounted switch.

All good in Hillbilly land

[Panic mechanic!]

yup it can be controlled manually,aw4's were first put in tj's so that people could improve the mpg by running a 4 speed auto, you can have it manually controlled  but have fun keep flicking the switch everytime you want to change gear, coming from the shire I thought you wouldn't want to do that much work when driving.lol
to keep it fully auto then you would need the original loom.
Plus you know americans never really tell you how it really is,to them a 5 miniute job takes 3 years of head scratching (double J and co exempt) lol

[ferretjuggler]

TH400!!

Cheers Peter
Yes I know how good they are, possibly the strongest thing going, but a fuel guzzler too.

Only T/C I have that fits straight up is the Quadratrac BW1339, again a fine unit if set up well, but also a fuel guzzler.

Thanks also Rob, you're right about yanks in that respect.

[Panic mechanic!]

if you really want something that gets maximum mpg then why not just convert it to a manual? lot easier than playing about with aw4's and switches all over your dash.
got to admit I have never really worried about mpg, the reality is you go to the petrol station stick £20 in and when it needs more you feed it! If you are going a long distance you fill it up and do the same again when its nearly empty.
You also got to realise its how you drive it that makes the biggest difference, you hoof it and it will drink more and any gain would be instantly wiped out.

[ferretjuggler]

I honestly wish I could live in a world where I was rich enough just to keep filling up and not counting the cost

I can't really afford to insure/tax/mot two vehicles at the same time now, so if I am gonna have a serious 4x4 as a DD, it's gotta be good on fuel.

I run about 1000 miles a month, so in the full size V8 Cherokee this would be about £500 a month at 12mpg

If I could get 24mpg or  LPG equivalent, that's £250 which I can just about stretch to

[isle of man]

**cough**

Put one of those old school Nissan diesel engine in it - FD or is it SD 3500 I know it's bastardising but it will keep you on the road - and then you have the option of cheap chip fuel.

Off topic I know but it's another and more cost effective option.

[ferretjuggler]

OK I been on Google for a couple of hours  

Information on Jeep auto boxes is a bit sketchy

Basically, after the TH400 there were no more AMC patternend boxes from GM.
Then there was the Toyota derived AW4 period with Japanese made transmissions.
Then with AMC/Jeep being Chrysler owned the Torqueflite derived boxes took over.

So I'm thinking it's a 42RE which should be the object of my desire.
Of course this is controlled by modern electrickery, so it's gonna be easier to transplant the complete powertrain inc the engine.

Research suggests I might be able to nail a Dana 300 onto it's tail with little or no expense.

[ferretjuggler]

**cough**

Put one of those old school Nissan diesel engine in it - FD or is it SD 3500 I know it's bastardising but it will keep you on the road - and then you have the option of cheap chip fuel.

Off topic I know but it's another and more cost effective option.

Sorry to piss on this idea, but.................................
I had a Nissan Patrol fitted with a SD33 about 5 years ago.
The engine/transmission ain't never gonna wear out, at least not before you expire from old age
About 3-400,000 miles I reckon, but the damn thing is slow and totally gutless.
Nissan produced it for Chrysler Marine, way back in 1966, it really shouldn't have found its way into a 4x4, better kept on boats really.
Fuel consumption was only 21-22 mpg, hardly better than a 4 litre Jeep lump, and with only 95 bhp on tap too.

[isle of man]

Agreed about the SD33 but the one I was thinking is the 4 cyliner turbo lump - http://en.wikipedia.org/wiki/List_of_Nissan_engines

[wildwood]

TH700R4 with camaro bits to stop slip....... tis a 400 with OD......... but and a huge but.............


JP mag did a 700R4 into TJ with auto to replace 3 speed .......... the 700 sucks power so they ended up with a TJ that was gutless not anymore fuel efficient and required a re-gear to get back to what it was and performance was still lacklustre............ done as an excercise but they said not worth it unless LS1 up front as well

As a matter of extreme anorak...........I read that the TH400 although it can handle 1200 bhp when modified...in stock form sucks 30 bhp just thro the torque converter........ so I guess thats why they try to use the eco XJ box in CJ TJ  etc..

[ferretjuggler]

Fuck me they make more sorts of engines than you can shake a stick at

Trouble is with devil-fuel is that I am a lazy bastard who wants an auto trans.
That sort of narrows the diesel choice down a bit, 'cos to do this on the cheapo you gotta transplant the whole powertrain from a auto diesel 4x4.
Isuzu Trooper 3.1TD makes 130 ish bhp but does just 23mpg
Jeep  GC 3.1TD makes 140bhp but 22mpg (VM engine so a non starter)
Jeep 2.7 (merc) CRD makes 161bhp and 29mpg in a GC, but it wont come for peanuts will it?

Alternatively ZJ GC with a 4.0 HO will average about 18mpg and with sequential LPG that works out eqivilent to about 24mpg maybe a bit more.
Still with 190bhp on tap

[Panic mechanic!]

http://www.getlpg.org.uk/stations/shropshire

[scrw]

Alternatively ZJ GC with a 4.0 HO will average about 18mpg and with sequential LPG that works out eqivilent to about 24mpg maybe a bit more.
Still with 190bhp on tap

LPG is 1/2 the cost of petrol these days, equivalent cost is more like 34mpg with MPI LPG

[isle of man]

OK OK if Nissan is not your bag for diesel (don't laugh) look at these complete with autobox very little electricketry CLICKY

[Panic mechanic!]

http://en.wikipedia.org/wiki/MCW_Metrobus

may as well add this to your list then.......

[ferretjuggler]

Springhill Service Station 500 yards from my house, but not cheap (78p? last time I looked)

A litre of LPG won't take you as far as a litre of unleaded petrol it has only 75% of the calorific value, so good folk who insist that they can travel just as far (or further even) on 50 Litres of LPG as they can on 50 Litres of petrol, must be subconsciously backing off the throttle on LPG.
Either that or they can defy the laws of physics.

So even at 65p a litre you only get 50% extra miles per £ by my calculation, but still well worth it if you don't have to travel out your way for gas.
Especially with a guzzler like a large 4x4.
And better still if you get the LPG system already fitted on a cheap motor.

OK OK if Nissan is not your bag for diesel (don't laugh) look at these complete with autobox very little electricketry CLICKY

Cheers Peter
Yeah I looked into a Musso, the Merc engine is an old design and not too clever on power or milage, but you do get auto as an option.
And they fetch practically scrap money even in mint condition, possibly less than scrap actually, 'cos they look 

[isle of man]

Cheers Peter
Yeah I looked into a Musso, the Merc engine is an old design and not too clever on power or milage, but you do get auto as an option.
And they fetch practically scrap money even in mint condition, possibly less than scrap actually, 'cos they look 

It's the old Sprinter engine good for 300k - I have one kicking about for the TGB transplant.

[Panic mechanic!]

caliorific value are you putting fuel in a vehicle or putting it on a diet? Think you are looking at it too deeply, all that the calorific value is is the rate of heat that it burns at, which is why you change the plugs on a lpg vehicle, a Litre is still a litre  it still takes the engine the same amount of time to burn it, it may not produce as much hp but  it doesn't make that much difference and its not something you would notice.

[ferretjuggler]

If you followed that line of reasoning a litre of petrol is as good as a litre of diesel.