Mitchell Overdrive - noise to expect
 

Have Mitchell old in car, letting off on gas I get sort of whirling noise, traveling, I get a little of same. Does anyone experience same ?

Re: Mitchell Overdrive - noise to expect
 

Hi there, The Mitchell overdrives tend to get rid of their oil a little out of the breather tube. It pays to keep a close check on the oil level fairly often. Regards, Kevin.

Re: Mitchell Overdrive - noise to expect
 

Thank you, overdrive comes with tube you install and you install overflow fuel filter I think on top to take care of expansion then it leaks back down upon cooling.

Re: Mitchell Overdrive - noise to expect
 

The ones I have driven have been very quiet maybe its the rear end?

Re: Mitchell Overdrive - noise to expect
 

Mine is quiet and I put a line from the OD to the rearend top bolt for a vent.Tied both to filter up higher that unit

Re: Mitchell Overdrive - noise to expect
 

gears are straight cut . so except some noise

Re: Mitchell Overdrive - noise to expect
 

Wet to Bville with JWL back in 02 5000 miles round trip and it never made a sound. I think it's a great unit.

Re: Mitchell Overdrive - noise to expect
 

sounds like rear end noise.

Re: Mitchell Overdrive - noise to expect
 

I don't think they are.

Re: Mitchell Overdrive - noise to expect
 

gears are not straight cut as mrtexas said.

Re: Mitchell Overdrive - noise to expect
 

What I have found out so far is they will overtime quiet down as they wear in , this was from Mitchell. Checked everything ..all ok. It' takes pla CEO as you let up on gas pedal , very little sound and when below 40 mph it sings a very little not loud but you can hear it after 45 you can't hear. Others have said it does have a little whirl sound. Especially at low speed. John

Re: Mitchell Overdrive - noise to expect
 

So other than the noise, how do you like it? What car are you using it in? Hoping someday to get one myself.

Re: Mitchell Overdrive - noise to expect
 

A rear axle with too much play on the pinion to ring gear mesh can get pretty loud when you have it under load then quiet down completely when you let off the throttle. This is usually due to worn pinion tapered bearings that no longer have the correct pre-load. This allows the pinion to go off center under load. Makes for a loud groaning sound when this happens.

Yours is the opposite since it makes a sound when you let off. The planetary in an overdrive should run pretty quiet. Many of them freewheel when you let off. It might be the overrunning clutch that is making the sound if it has one. I'm not familiar with the innards of a Mitchell.

Re: Mitchell Overdrive - noise to expect
 

Interesting am finishing off fitting a Mitchell will post an opinion after a road test in a couple of weeks

Re: Mitchell Overdrive - noise to expect
 

Let us know how you go Trevo.. How did you get yours in NZ ?

Re: Mitchell Overdrive - noise to expect
 

Talkwrench I got mine from Mitchell Manufacturing a year or so ago waited for winter to do the job ended up sidetracked with a brake upgrade on my Boss so have another couple of weeks before it's ready drive I don't work night and day anymore ha ha!

Re: Mitchell Overdrive - noise to expect
 

So you just got it regular post?

Re: Mitchell Overdrive - noise to expect
 

Mine is quiet. I run 80w140 gear oil in it though.

Re: Mitchell Overdrive - noise to expect
 

Talkwrench no it was picked up from there plant by Mainfreight and shipped down here. I preferred to organise my own freighting took a few weeks to get to NZ

Re: Mitchell Overdrive - noise to expect
 

The OD is on my 1941 coupe, had it put on by pro who never did one of these before so was anxious to do one. According to info given, the lever on the OD should face straight down or up however you decide you want to assemble, up or turn unit around and it will face straight down. I noticed mine faces at slight angle from straight down when OD IS ENGAGED. I SAW THIS WHEN I LOOKED UNDER CAR IN GARAGE TODAY. BUT THINKING ABOUT IT ACCORDING TO INSTRUCTIONS, YOUR SUPPOSE TO PUT OD IN NEUTRAL THEN ADJUST LINKAGE SO IT FACES DOWN.?.? I'm not too swift on this set up, I'm a DIY guy learning about flatheads and OD'S any help appreciated. John