Gearbox Overheating

Submitted: Monday, Apr 14, 2003 at 06:21
ThreadID: 4386 Views:1823 Replies:5 FollowUps:6
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I've got a 97 40th anniversary 80 series auto. The console inside the car gets so hot it burns my leg. (Seriously, Blisters last trip to Melbourne) The console has always got hot but I dont rememebr it getting this hot. Is this normal for these things or do I have a problem. The Local Mechanic reckons the gearbox seems OK but must admit he has limited knowledge. Live in a country town so would appreciate some advice b4 going to town to see expert.


Regards Garry
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Reply By: Wazza (Vic) - Monday, Apr 14, 2003 at 09:15

Monday, Apr 14, 2003 at 09:15
Garry,

check out post number 3795. A lot of us having the same experience with the manual gearbox, although not to the point of blisters, ouch !! I am not sure, maybe oil flow through the cooler is being restricted?? I am just looking in my Gregorys manual now. There is a oil temperature sensor on the auto that is supposed to (if I am reading this right) create a closed circuit at around 145-155°C. There is a warning lamp on the dash that should illuminate if this temperature is reached.

Being a bigger box (i am assuming it is bigger?) than the manual, I guess the auto is passing on more heat through the floor pan due to the fact that the gearbox will be closer to the body (hehe, both the car's and yours!) than the manual. Hope this helps...Cheers,
Wazza
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AnswerID: 17560

Follow Up By: Garry - Monday, Apr 14, 2003 at 18:03

Monday, Apr 14, 2003 at 18:03
Thanks Wazza and all you other guys. Did check out 3795 and it's heartening to know that this appears normal. I've had this thing for 4 years now and it's always been hot but as I said it's never bitten me before. I'll check the oil cvooler and housing tomorrow and let you know.
If OK I'll just add some insulation.

Regards Garry
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FollowupID: 11051

Reply By: Bob Y. - Qld - Monday, Apr 14, 2003 at 11:39

Monday, Apr 14, 2003 at 11:39
Garry, Check for mud build up on top of 'box. Maybe you could line the inside of plastic console with some thin styrene or similar insulating material. We've had 2 manual 80 series, and they never got that hot. Have only ever that problem off a Yamaha TT350, on a March morning when it got to 47'C that day.

You can buy spray on foam by POLYFILLA, it swells to 2-3 times its volume, and could be moulded or shaped to fit over the tranny hump.

Hooroo...
AnswerID: 17571

Follow Up By: GaryInOz (Vic) - Monday, Apr 14, 2003 at 12:35

Monday, Apr 14, 2003 at 12:35
Probably not a good idea to fill the gap as it would also reduce airflow around transmission. May be better to invest in a bigger transmission cooler.
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FollowupID: 11031

Follow Up By: Bob Y. - Monday, Apr 14, 2003 at 13:14

Monday, Apr 14, 2003 at 13:14
You're right, but I was suggesting between the console and tranny hump, inside the cab. Just didn't word it too well.

It'd be cool that other way too, but only till the auto cooked itself. An a/market cooler would be the way to go. or lots of burn cream. Hooroo...
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FollowupID: 11034

Follow Up By: Truckster (Vic) - Monday, Apr 14, 2003 at 15:29

Monday, Apr 14, 2003 at 15:29
Have you checked the Oil Cooler infront of the Radiator to see if its blocked with mud??

No air flow here and the oil aint going to cool, theres only one place for the heat to go then..

Just another thought....
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FollowupID: 11045

Follow Up By: Truckster (Vic) - Monday, Apr 14, 2003 at 15:30

Monday, Apr 14, 2003 at 15:30
also can be blocked with bugs and other crap, not just mud.
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FollowupID: 11046

Reply By: Truckster (Vic) - Monday, Apr 14, 2003 at 21:44

Monday, Apr 14, 2003 at 21:44
From a mate that runs the Prado list, who is also guru on 80scool

lc_80 says: sounds a bit too hot - does it have a heat shield for the EXHAUST - they are known to come off and heat the floor / trans tunnel.

Is the trans cooler working properly
AnswerID: 17618

Follow Up By: Member - Tim- Tuesday, Apr 15, 2003 at 01:35

Tuesday, Apr 15, 2003 at 01:35
I would look into your exhast system heat shields etc before long
That sort of heat rarely comes from anything else without it failing
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FollowupID: 11072

Reply By: bmw1 - Saturday, Apr 19, 2003 at 17:41

Saturday, Apr 19, 2003 at 17:41
I have an 80 seris auto and it has never got that hot towing a camper trailer with 6 push bikes and family of 8 along new england h'way. sounds like trouble to me.
AnswerID: 17929

Reply By: Flash - Sunday, Apr 20, 2003 at 22:05

Sunday, Apr 20, 2003 at 22:05
Nothing wrecks an auto gbx like excess heat-
4WD or otherwise.
Find a way to cool it better if you want it to last- and change your transmission fluid to synthetic.
AnswerID: 17982

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