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pajero autotrans overheating

Submitted: Tuesday, Oct 04, 2005 at 14:44

wally pajero

hi lads
93 nh 3.0 ltre auto transmission over heats when towing camper trailer up hills left penrith got to the hills in barrington tops when transmission light comes on should bigger oil cooler be fitted (auto was serviced before leaving), any sugestions would be great.
wally pajero
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ThreadID: 26984 Replies: 9
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AnswerID: 133014   Submitted: Tuesday, Oct 04, 2005 at 18:03

PBob replied:

Some oil coolers run through the radiator and are mean't to be cooled by the hot water. This has the effect of heating the oil even more, not less. bigger air filled oil coolers on the front of the radiator are probably the go. Or buy a manual.
Don't drive it too much in overdrive, pull it back at any slight incline.
Reply 1 of 9
AnswerID: 133015   Submitted: Tuesday, Oct 04, 2005 at 18:07

Member - Trevor R (QLD) replied:

Wally,

If you do not regularly have this happen or you don't intend on climbing big hills regularly I would not worry about it. My 96 3.5 lt did this once in it's 170 000km life with me but that was also on an extremely big climb with van in tow. No side effect were the result of this occurence.
If you ntend on doing similar work like the Barrington Tops regularly then maybe look into a transmission cooler.

Regards Trevor.
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Reply 2 of 9
AnswerID: 133017   Submitted: Tuesday, Oct 04, 2005 at 18:24

Exploder replied:

Heat is the number2 enemy of the auto transmission, so fitting a oil cooler up front will not do it any harm, if anything it will be good for it
Reply 3 of 9
AnswerID: 133051   Submitted: Tuesday, Oct 04, 2005 at 21:18

snailbait replied:

hi wally
i would fit more cooling for your auto tans also put synthec oil in the gear box and all other gears
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Reply 4 of 9
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AnswerID: 133058   Submitted: Tuesday, Oct 04, 2005 at 21:42

uncle replied:

Hi there Wally,we've just got over the exact same problem,we have an NF V6 wagon and the light was coming on enough to annoy the ya know what out of ya.Took the Paj to local auto trans experts in town and not only fitted a bigger cooler, but ran it in series through the old one also,there was enough room to fit another and all is well now.We tow a 1200kg van but will have a lighter 4x4 camper trailer later,to get to the out of the way spots.Just for the record coller and fitting all up was $300 I thought that was quite good.Cheers and good luck
Reply 5 of 9
AnswerID: 133060   Submitted: Tuesday, Oct 04, 2005 at 21:44

Truckster (Vic) replied:

Extra oil cooler will cost you round $200-400 TOPS, cheap insurance.
Reply 6 of 9
AnswerID: 133065   Submitted: Tuesday, Oct 04, 2005 at 22:17

Chaz replied:

Hi Wally,
What I do is lock the torque converter when towing up long hills. The trans runs at 70C, cooler than the engine. Manual lockup systems certainly arn't for everyone, but they do help your transmission to run cooler.
Chaz
Reply 7 of 9
AnswerID: 133117   Submitted: Wednesday, Oct 05, 2005 at 09:57

wally pajero replied:

thanks for the reply lads shall fit a cooler with existing coolers and run synthec oil in trans
thanks again
wally pajero
Reply 8 of 9
FollowupID: 387378   Submitted: Wednesday, Oct 05, 2005 at 18:22

Exploder posted:

Wally, Just be sure that the Synthetic transmission Fluid meet’s the Pajero’s specification’s I.E if it takes Dextron 3 Make sure the Synthetic fluid is a Dextron3 fluid.

I’m sure you know this, but I would hate for you to damage the transmission, as we know autos can be sensitive bits of machinery and the incorrect fluid can cause problems.
FollowUp 1 of 1
AnswerID: 133439   Submitted: Friday, Oct 07, 2005 at 12:56

pathfinder replied:

make sure bullbar isn't blocking airflow to existing tranny cooler. Supercheap currently seeling coolers from $70...
Reply 9 of 9