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replacing 80 series auto with manual

Tech Talk for Cruiser owners.

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replacing 80 series auto with manual

Post by rockcrawler31 »

There's an 80 series turbo diesel that i'm looking at and if it goes at the right price it might be worth it (has all the fruit)

Only problem is it's an auto

did the auto 80 series come with different diff ratio's like the Patrols?

how hard would it be to swap in a manual? I'm guessing the hardest bit would be fitting a clutch pedal set?
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Post by Red Rover »

same ratios in the diffs

Cross member in a different position and different tailshafts.

I thought the 80 series autos were good, particularly the electronic version.

What year is the one you are looking at.

I would just put the extreme valve body in it and drive it, or if you are fitting bigger tyres, throw 4.55 ratios in the diff.

I did both of these thing to my petrol auto and the auto was good off road, still miss it.

I would like to change my manual to auto if i could
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Post by rockcrawler31 »

It's behind a 1HDT motor.

I'm mainly worried about fuel economy. I'd be getting it as a second car for touring as mine is starting to be a bit impractical for long distance touring.
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Post by thrashlux »

rockcrawler31 wrote:It's behind a 1HDT motor.

I'm mainly worried about fuel economy. I'd be getting it as a second car for touring as mine is starting to be a bit impractical for long distance touring.
on the hiwy the auto wont be much different in economy it has a good overdrive ratio and a lock up torque converter

but i understand i just dont like self cog swappers

but thats because i am a bit of a ricer in remission :lol:
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Post by crazy eyes »

autos rock
I have the cruiser auto in my 75 ute with 4.5 ltr petrol and it maid no differents to economy but a little to the power but it makes driving offroad easyer
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Post by simkell »

would you consider a swap? i have a h150 I have pulled out and would love an auto.
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Post by rockcrawler31 »

simkell wrote:would you consider a swap? i have a h150 I have pulled out and would love an auto.
i havn't actually bought one yet, but it's a possibility. :D
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Post by thrashlux »

rockcrawler31 wrote:
simkell wrote:would you consider a swap? i have a h150 I have pulled out and would love an auto.
i havn't actually bought one yet, but it's a possibility. :D
would be easier to swap chassis and drive shafts too

maybe just swap cars :lol:
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Post by dow50r »

If you are not doing steep descents with it, then the auto is better in every other way....ie shifts gears at full boost, od of 2200/100kms compared to 2500 in 5th, biggest issue with an 80 is the tight crunchy 5 speed gearbox, hdt came with a442 early on, with prnd321, later ones (8/92 on) had abs and power/eco mode switch on dash, they were alot better.
Be worried about the bigends in these motors, they need replacing every timing belt change.
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Post by stilivn »

ide leave it with the auto mate, ive got a manual 4.5 and am a manual man, hate auto's but when i put bigger tyres on the diff backlash causes the clutch to slip and their not cheap or fun to change. pain in the arse in traffic too, seeing gone to a heavyy duty
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Post by muzza85 »

mate its a 4x4 not a ricer in IMO id leave it
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Post by badger »

My 80 has an auto. I wasnt keen at all when i got it, but the missus cant drive manuals. After owning it for 2 years now i absolutly love it in every instance other than steep decents, wich i have learnt a few ways to make better. Im 100% sure that when i get the valve body done decents will be just as good as a manual and everything else will be even better.
You will need to learn to drive again to use it offroad and see the benefits tho

If you realy are the boy racer type you may be interested to know a turbo diesel auto is quicker than the manual
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Post by rockcrawler31 »

muzza85 wrote:mate its a 4x4 not a ricer in IMO id leave it
Awesome reply dude. Since when is wanting a manual in a fourby a ricer thing :roll:

Ok the main reason i'm not keen on an auto is the fuel economy and descents, but i can see how it would be nice and comfortable on the highway/city regarding driver effort/fatigue. Having it change on boost and better sand driving capability is a plus too.

But other reasons include that if you have backlash in the system you have no control over softening putting it in and out of gear/reverse, where with a clutch you could softly engage drive to eliminate the slam in the transfer/final drive. Also i simply have no idea how they work internally, and i like to know what is happening inside my car.

It would also be a 15-18 year old gearbox too, so while i know that modern autos can fully lock the converter for economy and can be quite efficient i don't know about the older ones.

It sounds however like they could have their merits though and i'm starting to agree that for a tourer it might not be all that bad.[/b]
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Post by oldmate »

I would suggest drivng the truck first and making your own decision but i can say from experience:

The auto doesn't clunk like a manual with the driveline backlash because the torque convertor always takes up the slack. It might clunk when changing range (p -r-d)

The auto will be the a442 which has a locking tc on 3rd and 4th gear. The original a440 had this as well.

The auto also has a shorter over drive. the difference is 400 rpm at 110kph

Also because of the taller first gear you don't need to rev the tits off it to keep up with traffic when starting from a standstill. All in all i'd say the auto is more fuel efficient. But I cant say for sure because i'm comparing a diesel to petrol.

And as for going down steep decents, it's just something you get used to. I'd say look at the big picture. How much time is spent going down 45 degree hills compared to every other aspect of driving.
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Post by muzza85 »

muzza85 wrote:mate its a 4x4 not a ricer in IMO id leave it
haha sorry that wasnt even for this topic it was for the blow off valve one i dont know how i ended up typing it here :?
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Post by thrashlux »

rockcrawler31 wrote:
muzza85 wrote:mate its a 4x4 not a ricer in IMO id leave it
Awesome reply dude. Since when is wanting a manual in a fourby a ricer thing :roll:

[/b]
haha it is for me but i know i am a retard :armsup:

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Post by muzza85 »

its half a ricer which is only semi retarted :D
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