Another newbie 4+3 ???

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Feb 28, 2003 | 08:59 PM

Curveit

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Drifting

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From: San Antonio Texas

Another newbie 4+3 ???

New guy here...I'm not new to cars, just computers. I've just discovered
the forum and I really enjoy it; very imformative.
now for my question...my 4+3 has a "straight-cut gear" type whine when
the OD is engaged. I've had the car for a couple of years and it's always
done this. Is this normal, or is it ready to take off my right leg? Thanks

:seeya

Feb 28, 2003 | 09:11 PM

scorp508

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From: Boston, MA

At what speed are you engaging the overdrive and is the whine all the time?

Feb 28, 2003 | 10:43 PM

CentralCoaster

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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed

Re: Another newbie 4+3 ??? (Curveit)

I've started to notice this sound too. I get it at idle with the clutch disengaged. It might do it when driving too... but I can't hear it over the road noise.

It never did this until I put Mobil 1 in the gearbox. I didn't put any of the friction modifiers in there.. perhaps I should?

Welcome to the forum.. :thumbs:

Feb 28, 2003 | 11:13 PM

scorp508

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From: Boston, MA

Re: Another newbie 4+3 ??? (CentralCoaster)

I run Mobil 1 Synthetic 75W090 gear oil in the 4-speed and Mobil 1 Synthetic ATF in the Overdrive.

What sort of noise are we talking about exactly? Is it...

1. Noisy in all gears.
2. Noisy in high gear
3. Noisy in neutral with engine running
4. Noisy in all reduction gears
5. Noisy in 2nd only
6. Noisy in 3rd only
7. Noisy in reverse only

Feb 28, 2003 | 11:16 PM

FlyboyZR1

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From: Minneapolis MN

Re: Another newbie 4+3 ??? (Curveit)

Mine makes a low-pitch whine during low-speed OD engagements, otherwise it's quiet.

Feb 28, 2003 | 11:17 PM

scorp508

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From: Boston, MA

Quote:

Mine makes a low-pitch whine during low-speed OD engagements, otherwise it's quiet.

How low? You should try to keep it out of O/D under 45mph to make sure line pressure is high enough to fully cool/lubricate all of the clutch packs.

Feb 28, 2003 | 11:20 PM

FlyboyZR1

Drifting

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From: Minneapolis MN

Re: (scorp508)

Quote:

How low? You should try to keep it out of O/D under 45mph to make sure line pressure is high enough to fully cool/lubricate all of the clutch packs.

Well around 50-60 I will hear a slight whine with the O/D engaged, however if I speed up to 65+ the whine will go away. I hope that is normal. :)

[Modified by FlyboyZR1, 10:21 PM 2/28/2003]

Mar 2, 2003 | 09:35 PM

Curveit

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From: San Antonio Texas

Re: Another newbie 4+3 ??? (Curveit)

It's in all gears...Louder when decelerating
I usually don't engage the OD untill 60-65 MPH.
Up there the road noise and the frequency pitch is too high to hear I guess.

Thanks & SAVE THE WAVE