Drove in 4H on highway without hubs locked
Submitted: Saturday, Aug 15, 2015 at 20:42
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John A27
Wondering if anyone can tell me what kind of damage I've done to my 1999 Jackaroo (manual l, 3.5L petrol V6).
I sleep in the back, and this morning as I climbed back into the driver's
seat I must have bumped the 4wd selector into 4H.
It was a
bright day, with the sun on the dash, and I didn't see the dash light - not sure if it was on to be honest. I
check the lights often. I noticed the vehicle pulling to the right under acceleration. I pulled over, got out and checked the tyres thinking I had a flat, and when they were all fine I checked the right front
suspension and could see nothing amiss.
Pulled away again and it had gotten worse. Then I wondered whether I might have bumped it into 4wd, and found I had. The hubs were not locked. I had driven at around 100km per hour for 150km. Anyone know what I might have done to my car?
Reply By: Michael H9 - Saturday, Aug 15, 2015 at 20:46
Saturday, Aug 15, 2015 at 20:46
If the hubs weren't locked then I wouldn't be worrying. You were only driving the front driveshaft and axles, not the front wheels. You can't wind it up with the hubs unlocked.
AnswerID:
589289
Follow Up By: John A27 - Saturday, Aug 15, 2015 at 21:05
Saturday, Aug 15, 2015 at 21:05
Thanks for the reply. I've definitely done something though. I should have mentioned - there was a high pitched whine coming from the right front when I went to take off again. When I put it back in 2H it drove fine - no pulling and no whine. Spindle damage? I don't know much about how locking hubs work, but my owners manual tells menot to drive more than 100metres in 4wd without the hubs locked in.
FollowupID:
857104
Follow Up By: Frank P (NSW) - Saturday, Aug 15, 2015 at 22:45
Saturday, Aug 15, 2015 at 22:45
You can get a whine from the transfer case at higher speeds. My Prado did it, and so does my new BT50. Not loud, but it's there nonetheless.
It won't hurt to go in and out of 4H on a hard surface if you can find a long straight. It's corners and steering input that cause wind-up. Keep driving straight, go into 4H, listen for the whine and go out again. My feeling is if it whines in 4H (or 4L for that matter,
test that too, driving straight) but not when you return to 2H, then it's probably ok.
Just my opinion.
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Reply By: Bob Y. - Qld - Saturday, Aug 15, 2015 at 20:48
Saturday, Aug 15, 2015 at 20:48
If hubs were unlocked, then you wouldn't have done anything, I'd suggest.
Bob
AnswerID:
589290
Reply By: Les - PK Ranger - Saturday, Aug 15, 2015 at 20:51
Saturday, Aug 15, 2015 at 20:51
Hubs not locked, you _should_ be ok ???
That said, it sounds like you may have had some sort of binding happening.
If it's like and 4wd with manual front hubs you shouldn't have noticed.
AnswerID:
589291
Follow Up By: John A27 - Saturday, Aug 15, 2015 at 21:08
Saturday, Aug 15, 2015 at 21:08
Yeah, I think binding too, but I don't know anything about hubs. Glad to hear I haven't over-torqued the drivetrain though.
FollowupID:
857105
Reply By: Ozhumvee - Saturday, Aug 15, 2015 at 21:45
Saturday, Aug 15, 2015 at 21:45
I've done the same a few times over the year in Landcuisers, also driven for extended periods and speeds on loose gravel and dirt roads in H4 and you wouldn't have done any damage at all.
AnswerID:
589296
Reply By: Bonz (Vic) - Sunday, Aug 16, 2015 at 09:54
Sunday, Aug 16, 2015 at 09:54
What dya mean hubs werent locked? Dont Jacks have auto front hubs?
AnswerID:
589309
Follow Up By: John A27 - Sunday, Aug 16, 2015 at 10:08
Sunday, Aug 16, 2015 at 10:08
Later models, or top-of-the-range ones might have.
Mine are manual.
FollowupID:
857133
Reply By: pop2jocem - Sunday, Aug 16, 2015 at 11:19
Sunday, Aug 16, 2015 at 11:19
John,
Are you sure both of your free wheeling hubs are actually disengaging?
For the car to pull to the right (or left depending) on acceleration, it may be that the hub on that side is not releasing.
If one wheel and it's drive shaft is still being driven by the road when in 2WD and the other not, and you have a normal non locking front diff that side drive shaft will spin the diff center. Maybe that is the whine you are hearing.
Maybe jack the front wheels up one at a time and
check.
Cheers
Pop
AnswerID:
589315
Follow Up By: John A27 - Sunday, Aug 16, 2015 at 12:10
Sunday, Aug 16, 2015 at 12:10
Thanks for the great idea. Will do that.
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857140
Reply By: AGNI4x4 - Sunday, Aug 16, 2015 at 20:45
Sunday, Aug 16, 2015 at 20:45
Inner free wheeling hub would have been spinning in outer of hub ............... if in doub't just pull free wheeling caps of and have a look for any damage to hub ? Takes about 5 minutes per side.
AnswerID:
589341
Reply By: Stewy - Tuesday, Aug 18, 2015 at 14:21
Tuesday, Aug 18, 2015 at 14:21
If you read the manual it used to tell you to do that to stir up the oil and lub the front assembly about once a month
AnswerID:
589398