[Shop-talk] Manual transmission issue???

[Bob Spidell]

One of my Austin-Healeys has diff whine since I put in taller gears, and 
it whines on accel or decel, but I'll be damned if I can recall which it 
is offhand. The other possibility is the throw-out bearing, but it would 
likely whine all the time (and eventually fail outright).

None of these would trigger a CEL; what was the cause of that (should be 
on the invoice she got from the shop)?


On 5/25/2025 8:15 AM, Moose wrote:
> Jeff, this is a good idea.  Will do.
>
> The reason I'm really confused is that the noise is only when you give 
> it ANY throttle.  So even if you are not accelerating (i.e. Not under 
> load.), but just have the pedal down a little, you hear the noise.
>
> Wouldn't both the differential and drive shafts make noise all the 
> time, or at least under load?
>
> But I plan to do a much deeper dive.
>
> Thanks again to everyone with this.
>
> Moose
>
>
>
> From: Jeff Scarbrough <fishplate at gmail.com>
> To: Moose <eric at megageek.com>
> Cc: "shop-talk at autox.team.net" <Shop-talk at autox.team.net>
> Date: 05/25/2025 11:03
> Subject: Re: [Shop-talk] Manual transmission issue???
> ------------------------------------------------------------------------
>
>
>
> Have you checked the differential(s) and drive shafts? My TR6 had an 
> annoying transmission noise that, after a rebuild, turned out to be in 
> the diff.
>
> Noises in a car are notoriously hard to track down by sitting inside.
>
> On Sun, May 25, 2025, 08:47 Moose <_eric at megageek.com_ 
> <mailto:eric at megageek.com>> wrote:
> Braintrust,
>
> I don't mess with transmissions at all, so I'm in the dark here. 
> Hopefully someone has the answer and it's an easy fix.
>
> The issue,   2017 Jeep Patriot with a 5 speed manual transmission 
> makes a 'whirring' sound when driving in 3rd gear or higher.
>
> Started about a year ago, when car was picked up from a franchise 
> mechanic shop.  (owner of car is a single woman without much money.)
>
> When she called them back they where like, "Well, we would have to 
> charge you to look at it."  So since she already suspected they caused 
> the issues, she didn't want to give them more money.
>
> She brought it to another shop and they said, "You need a new 
> transmission."  That will more than likely exceed the valve of the 
> Jeep. So they just did a fluid change, and that was it.  Note, in 
> their carfax report, they listed that they "installed a new 
> transmission" in addition to the fluid change, so I don't trust them 
> either.
>
> It's a manual 5 speed.  I checked the fluid level and it is exactly 
> where it should be.  So I did a road test.
>
> Here is the crazy part.
> There is NOTHING that I can feel that would indicate any transmission 
> problems. No slipping, no chucking, it shifts smooth and pulls 
> strong.  No vibrations. The only thing is that noise, and that ONLY 
> happens when you give it throttle.
>
> So if you are going down the street at 50, and take your foot off the 
> gas pedal, noise goes away. If you just give it a little gas, noise 
> returns.
>
> If you have it in neutral coasting, no noise.  If you are engine 
> braking, no noise. The noise is ONLY if you have your foot on the gas 
> in the slightest.
>
> Note, there is also no noticeable noise in 1st or 2nd gear.
>
> I am thinking that the original shop did something to the car to make 
> it start this noise, knowing she would take it back there to get it 
> fixed and that it's a simple fix.
>
> I would love to be able to fix this as it is a hard working girl that 
> doesn't have much money and really takes care of her car.  She is also 
> a good friend of my fiancee, so it would be bonus points for me. 8>)
>
> Thanks and I hope everyone takes a moment to think about all the 
> Soldier's that gave their lives to protect our freedoms, (no matter 
> what country you are from.)
>
> Have a great weekend!
>
> Moose_______________________________________________
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