Question for 80 series owners & maybe others

Submitted: Wednesday, Mar 12, 2003 at 13:45
ThreadID: 3795 Views:1883 Replies:9 FollowUps:0
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I own an 80 series petrol manual. On long trips the gearbox and area just in front of the floor pan gets very hot. It'll get to a certain temp and remain there. The heat on the driver's footrest becomes just bearable (when barefoot) and when resting my left leg against the gearbox housing it also becomes quite uncomfortable to the point of keeping my leg away from it. This has been going on for the last few years and I've just had the whole underneath serviced, new clutch, diff & gearbox oils etc.
The engine temperature remains constant and never had a problem with it overheating.
Has anyone had problems with this in the past? Is it normal? I know with the a/c on it cools it down a bit but with it broken we find more heat coming through the firewall then from outside on a hot day.
I visited 80s owners online but there's nothing there re this problem.
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Reply By: Coops - Wednesday, Mar 12, 2003 at 14:04

Wednesday, Mar 12, 2003 at 14:04
sounds pretty normal to me, well by that I mean mine is the same. If you hop underneath and touch the gearbox/transfer case you'll find them extremely hot.
Not having carpet etc probably reduces the insulation capabilities also but that was my choice.
There's some very clever people that check this forum out and I'm sure you'll get some great repsonses from other 80 series owners very soon.
AnswerID: 14948

Reply By: bruce.h - Wednesday, Mar 12, 2003 at 14:12

Wednesday, Mar 12, 2003 at 14:12
G day Chris
ihave had a hilux hj 75 ute & nissan patrol gq all three had the same problem as your 80 on long trips so no it not out of the ordinary, you can try lifting your mat or carpet & adding more insulation in the required area to help make it berable but its not something that ever cauced any problems in the 3 cars i owned
Regards bruce
AnswerID: 14950

Reply By: Member - Wazza - Wednesday, Mar 12, 2003 at 15:20

Wednesday, Mar 12, 2003 at 15:20

Same issue on mine and mine is a turbo diesel. Noticed it really hot doing sand driving last month in about 35° outside air temp, 3rd gear high range and foot flat to floor for about 5 minutes at 3000rpm. First time I ever saw the temp guage go above half as well - got to about 3/4. Yep, they do get hot around the gearbox housing.... I think it is normal and you don't have any problems there.
AnswerID: 14954

Reply By: tour boy - Wednesday, Mar 12, 2003 at 15:59

Wednesday, Mar 12, 2003 at 15:59
the 2 RV80 's, 40th anniversary 80's and the DX 80's that I've owned all did it. Don't worry about it.
AnswerID: 14960

Reply By: Member - DickyBeach - Wednesday, Mar 12, 2003 at 17:12

Wednesday, Mar 12, 2003 at 17:12
My #80 Blue Marlin ditto.
AnswerID: 14968

Reply By: lizard - Wednesday, Mar 12, 2003 at 20:59

Wednesday, Mar 12, 2003 at 20:59
The 4500 petrol 80 series I owned also suffered the same problem,the firewall and transmission tunnel was hot but the temp guage never moved.I gues when you generate that much powerthe heat has to go somewhere.
AnswerID: 14991

Reply By: firey - Wednesday, Mar 12, 2003 at 21:47

Wednesday, Mar 12, 2003 at 21:47
It's the same on my 96 Troopie and yes more insulation would help.
Regard's Firey
AnswerID: 14998

Reply By: Jim - Thursday, Mar 13, 2003 at 09:28

Thursday, Mar 13, 2003 at 09:28
Hi Chris.
My GQ Patrol had me worried with exactly the same symptoms. My High/Low selector lever got so hot I was reluctant to touch it. I added Morey's oil stabiliser to the transfer case (50%) and gearbox (10%) and there was a dramatic difference to the temperature of the lever and the floor area around the gearbox/transfer case. I also added it to the rear diff (50%) and the front diff (20%) with a noticeable heat difference to the rear diff.
We aware that these products (Moreys, Flashlube, etc) all have a definate useful life and ahould be changed regularly. I change mine approx every 50K. Otherwise it works well heat-wise and I believe must reduce wear.
AnswerID: 15046

Reply By: Member - Peter- Friday, Mar 14, 2003 at 22:21

Friday, Mar 14, 2003 at 22:21
Chris on all my vehicles I've removed the floor mats and then cut those closed cell foam sleeping mats you buy at Kmart or similar to fit all over the floor and up the firewall as far as you can reach. On the trans tunnel, up under the seats and firewall I glue them on with contact glue (gel type works best with less mess) while on the actual floor area I just cut them to shape and sit them on the floor.
Refit the original mats and seats etc, you will notice a big difference in heat and noise transmitted into the cabin.
The mats are cheap, don't hold moisture and the ones in the footwells can be removed for cleaning.
And yes the floor in all my vehicles have got too hot to touch in summer especially the first 1970 FJ40 with no floormats!
AnswerID: 15225

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