Gear noise in 80 Series HZJ80 after towing caravan.

Submitted: Monday, Feb 17, 2003 at 07:39
ThreadID: 3405 Views:1559 Replies:4 FollowUps:2
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After towing a caravan for an hour or so and unhitching van 1st and reverse gears are extemely noisy. Only happens after towing and when oil is hot. Disappears after oil has cooled. One gearbox repairer tells me it's normal, Toyota dealer says it's not.

Anyone had or heard of this problem?
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Reply By: Michael - Monday, Feb 17, 2003 at 13:37

Monday, Feb 17, 2003 at 13:37
Hi flesh, I had a Vs ss commodore that did same thing after towing our horse float, it worried the hell out of me. Whats more no one believed me!!! regards Michael
AnswerID: 13301

Reply By: Derek - Monday, Feb 17, 2003 at 22:07

Monday, Feb 17, 2003 at 22:07
Hi Flesh. Mine doesn't do it. Try changing to a different grade of oil first or an additive before shelling out big bucks for a GB repair. Good luck.
AnswerID: 13357

Reply By: jason_poole - Monday, Feb 17, 2003 at 23:17

Monday, Feb 17, 2003 at 23:17
i agree with changing your grade of oil.your gb repair man is right to say it is normal,but it still should not do it.80 series aren't known for their strenght while towing.if you tow often why not fit an oil cooler?if you do it right you can take it with you when you trade up.
also try an oil stabiliser.you can buy it at any auto shop.it will help the oil to not brake down while hot.
AnswerID: 13365

Follow Up By: Flesh - Tuesday, Feb 18, 2003 at 07:54

Tuesday, Feb 18, 2003 at 07:54
Actually did that yesterday (Gb and transfer) different oil in Gb to Transfer and both quite dirty. Looks like a long time since a change, I haven't had vehicle all that long and am working my way through it.

Gb oil looked to have a lot of metal in suspension which would account for it retaining heat. Synchros all working better (1st and 3rd were clipping and aren't now). The acid test will be on the next trip with the van.

Thanks everyone for your input.

Cheers
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FollowupID: 7853

Reply By: jason - Tuesday, Feb 18, 2003 at 10:42

Tuesday, Feb 18, 2003 at 10:42
If you have metal in suspension, and the oil is as dirty as you say, I would change the gearbox and transfer case oil again in 5000km to give it a flush. You will be suprised how much more metal and gunk will come out of it.
AnswerID: 13384

Follow Up By: Flesh - Tuesday, Feb 18, 2003 at 10:59

Tuesday, Feb 18, 2003 at 10:59
Thanks Jason, I had intended to do just that.
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FollowupID: 7858

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