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 Post subject: Whine on acceleration
PostPosted: Tue Jun 21, 2011 5:38 pm 
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Joined: Mon Jun 20, 2011 10:52 pm
Posts: 12
Hello,I have an isuzu Pup 2.2 Diesel w/4spd manualn 155K or so miles
The only time im hearing a slight whine ,somewhere in my driveline, is around 50 mph and only during the 1st second or 2 of gentle acceleration. The noise of the diesel and wind may be hiding further whining,i dunno.
To make it a little clearer as to when i hear the whine:
cruising at 50 mph,I barely depress the fuel pedal and I hear the whine,when I letup it goes away. If you were able to see my foot on the pedal,you may only see it move and inch? Im guessing of course,but the amount I depress the pedal is just enough to apply increased pressure to the suspect component. (gears ,pinion or ujoints?)

Yesterday I jacked my pup up off the ground and checked for the whine I am barely hearing when just during light acceleration at hwy speeds.
I lubed all zerts along the driveline(4x4). I could detect no u joint play,even at the pinion area
.
With all 4 off the ground I let her idle in each gear which rotated the drive shaft enough to hear the noise .Even at that low speed, In 3rd, there was some noise but when I put into 4th there was sigmificantly more rattling . It seemed to be from the rear diff.

I didnt get under the pup to listen and pinpoint the noise,because i was a little creeped out letting her run like that and pitting myself under it.

I will take a feel for the lube level this evening I hope.
Hopefully its just low and topping off will eliminate the noise.
I see no evidence of leaks though.

any helpfull comments,suggestions?


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PostPosted: Tue Jun 21, 2011 7:07 pm 
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Joined: Mon Jun 20, 2011 10:52 pm
Posts: 12
I got to it a little while ago

Ok, Inserted pinky to check lube level in the rear axle gear housing ...2nd knuckle,no lube!
So Ill drain whats in there ,flush out incase extral metal pieces inside and refill.
1-Should I fill with diesel and rotate for a while then drain?
2-what weight gear oil should I fill with when done flushing out?
3-Use syn gear oil or no?

4-Do I refill to the first pinky knuckle or do they require a certain amount in aunces,since im draining it anyway?

5-How is gear oil/lube lost when it hasnt leaked out? (155K without ever changing)
Nice and clean and dry. No lube came out,
6-Does it go out the spline shafts? Dont see leaks there either

_________________
8/81 IsuzuPup 4x4 Dsl 4spd Ac incl orig paint & Interior ,mpg 24@ 70 / 30 @50 orig ownr
79 Rabbit Dsl 5sp AC 40/ 51 mpg
90 E350 4x4 cont'd camper 8-10
01 MontSprt 4x4 19- 21
01 Class A 5 10 mpg
22 McCormickDeerng 1/10 acre/gal
69 GT350 conv 4sp 6 / 16


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