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Author Topic: 4x4 Auto gearbox  (Read 3459 times)

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Offline bluejay

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4x4 Auto gearbox
« on: December 11, 2013, 07:27:07 PM »
Having only ever had manual gear boxes in my 4x4s im no thinking of getting a colorado with the 6 speed auto in it  was wondering if any one knows if it does long periods{dont know how long } of 4x 4 work in sand and the likes is there any chance the auto will over heat  or am i worrying about nothing?
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Offline Nomad

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Re: 4x4 Auto gearbox
« Reply #1 on: December 11, 2013, 07:31:24 PM »
NFI sorry but auto is always better in sand.  :cheers:
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Offline Landyline

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Re: 4x4 Auto gearbox
« Reply #2 on: December 11, 2013, 07:45:48 PM »
There is always a chance an auto will overheat in sand.
If the Colorado is prone to doing it or not I have no idea.

I just bought my first auto 4wd as well. Haven't had it on sand yet though.

Best bet would be to get an auto temp gauge or an OBD2 reader if Colorado outputs auto temp. Then you can drive to the conditions or if it is too high you will know you need a larger cooler.
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Offline Marcus73

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Re: 4x4 Auto gearbox
« Reply #3 on: December 11, 2013, 07:48:11 PM »
I think it would all depend on how much of the thick stuff you're going through. I've recently purchased an auto Prado and didn't have any trans temp lights flashing at me when beach driving. That was a combination of soft and hard sand though. I've since bought a Scanguage so I can keep a closer eye on things


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KingBilly

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Re: 4x4 Auto gearbox
« Reply #4 on: December 11, 2013, 07:48:39 PM »
Read somewhere the new Colorado uses the same auto as the V8 Commodore.   Not sure if that is fact but may give you some idea of any historical problems with the auto box.

And, yes I agree, an auto is good on the sand.

KB
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Tractor88

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Re: 4x4 Auto gearbox
« Reply #5 on: December 11, 2013, 07:49:25 PM »
After market auto transmission coolers and valve bodies are available that will eliminate any probs associated with hard 4x4 work and/or towing. Most makes and models are catered for.
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Offline edz

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Re: 4x4 Auto gearbox
« Reply #6 on: December 11, 2013, 08:10:45 PM »
Have a talk to blokes at the Automatic shops they'l soon tell you of what to watch for.. If it was going to be dragging a camper trailer anywhere I'd be fitting an external cooler and temp gauges minimum , for extended towing and rough offroad work a larger oil pan and possibly a thermo fan plus beefed up impact protection ..
« Last Edit: December 11, 2013, 08:12:44 PM by edz »
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Offline speewa158

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Re: 4x4 Auto gearbox
« Reply #7 on: December 11, 2013, 08:21:20 PM »
Don't you know when its time to change up or down  ???. Auto box    ,   girlie thing . Stick shift grab a big handful & go for it . Forward , reverse , or down  to the axels. lts all good  .  :cheers:
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Offline bluejay

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Re: 4x4 Auto gearbox
« Reply #8 on: December 11, 2013, 08:47:58 PM »
auto 500 nm torque  manual 440 nm torque  i might need the extra 60 nm
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Offline RebsWA

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Re: 4x4 Auto gearbox
« Reply #9 on: December 11, 2013, 09:05:09 PM »
Engine will give up b4 the trans!
 >:D >:D >:D >:D >:D >:D
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Offline Alan Loy

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Re: 4x4 Auto gearbox
« Reply #10 on: December 12, 2013, 12:02:17 PM »
As said coolers are a good idea, also modifying the transmission to lock the converter can be very useful.  i found http://www.automatictransmission.com.au/ to be very helpful.  They modded my Patrol.
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Offline Bird

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Re: 4x4 Auto gearbox
« Reply #11 on: December 12, 2013, 12:56:11 PM »
Quote from: Alan Loy on December 12, 2013, 12:02:17 PM
As said coolers are a good idea, also modifying the transmission to lock the converter can be very useful.  i found http://www.automatictransmission.com.au/ to be very helpful.  They modded my Patrol.
Yep.. What Rodney doesnt know about Auto's isnt worth knowing.

He does rebuilds for all over the world - I've seen them being shipped out.
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Offline Foss

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Re: 4x4 Auto gearbox
« Reply #12 on: December 12, 2013, 01:12:29 PM »
A Scangauge II is a real bonus if it can be programmed for your vehicle for ATF temps. I had a quick look and ATF on a Colorado CRD 2008 onwards can be programmed. Having recently driven on Stockton Beach which was quite soft and reasonably hard going, my LC200 ATF peaked at about 120 deg, which is getting way up there. I was daydreaming a bit and not looking at the gauge, but as soon as I saw those temps, I stopped for a while to let things cool down. I believe the warning light on a LC200 comes on somewhere around 135 deg? As a comparison, the ATF on a mate's D-Max with me at the same time peaked at about 118 deg on his Scangauge.

Normal ATF for my vehicle just cruising around with the converter locked is about 60 - 65 deg. Yes, the auto box will heat up considerably. Convertor lockup is the key. Unlocked and the temps rise very quickly. Once a gear is locked, temps will also drop just as quickly. Overall, in my view, all the more reason to get a gauge of whatever sort and closely monitor your auto transmission temps. 

Cheers
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Offline Barry G

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Re: 4x4 Auto gearbox
« Reply #13 on: December 12, 2013, 01:28:10 PM »
If you are after an OBD2 reader there is also Ultragauge, as mentioned by several in this thread.  http://www.myswag.org/index.php?topic=28573.msg444573#msg444573
Not sure if it will do trannie temps for your vehicle.
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Offline Jeepers Creepers

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Re: 4x4 Auto gearbox
« Reply #14 on: December 12, 2013, 02:02:35 PM »
Fit  a nice big cooler to the auto and it should be ok.
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Offline chester ver2.0

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Re: 4x4 Auto gearbox
« Reply #15 on: December 12, 2013, 03:03:40 PM »
All to complicated the torque converter locking and then being unlocked creates the extra heat

Simple solution dont let your auto box continually hunt say you are on sand and it is continually hunting between 3rd and 4th either slow down a bit or lock it in third
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