2nd gear downshift grind

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Ron816

Ron816

Mopar forever
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When down shifting from 3rd to 2nd gear I’m getting a bit of grinding any ideas what may be the cause?
 
Besides what has already been mentioned, possibly poorly adjusted or worn clutch and/or shift linkage; insufficient clutch plate departure;
What you can TRY to do for the meantime is matching rpm's on down shifting. After some trial and error, you'll find the rpm sweetspot you need to match by blipping the accelerator for downshifting more smoothly. When I had a a 60's foreign sportscar I learned to do that.
 
Yes 4 speed, if I down shift under 2000rpm it’s fine above that I get a slight grind almost like when you miss a gear
 
Sounds like a weak second gear syncro you may also need the main shaft second gear because the engagement teeth may be worn may as well put a bearing, seal and gasket kit in it.
 
Ron816 said:
When down shifting from 3rd to 2nd gear I’m getting a bit of grinding any ideas what may be the cause?
Click to expand...

If yur a newbe to the A833, could it be that you are short shifting? When you do that you gotta be on the ball. If you allowed the rpm to come down too far before slipping it into the next lower gear, the synchro can only do so much. Ideally when downshifting , the rpm needs to rise up to reduce the load on the blocker-ring. And if it has to also struggle against a dragging clutch while trying to accelerate the gear back up to speed, it's gonna complain about it.
Ima thinking it could be grinding simply because of operator error.

As to the clutch teeth; for a street car, they can be repointed and back cut for another go-round. I've been doing that since the 80s; hundreds of happy customers.
 
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Being retired truck driver, this comes naturally, any time you down shift, you need to match the engine speed to the gear that you are shifting into. Doesn't matter really if you are going up.or down. Synchronizers really spoil us, but they still would like a little help.
 
That's for up shifting, double clutching, the time that it takes to let the engine slow down to the speed of the trans.
 
When you get better at matching rpms while downshifting, you can learn to "heel-toe" the brake and the accelerator, too.
I saw Mario Andretti race the road course at SIR in the late 60's/early 70's in an open wheeled car, he was unbelievable. At least twice as fast at downshifting as all the other drivers.
 
It is actually the inside cone of the Brass Syncro ring that is wore just enough to no longer be able to grab the gear to speed it up.

They start bottoming out against the gear, and then the gear cone and the syncro ring no longer mate up properly to match the rotating speeds so they will slide together easily. 2 different speeds of the parts is what is causing the grind.

The brass syncro ring is the consumable part.

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Make the 1-2 shift rod SLIGHTLY longer and see if it gets better. Doesn’t matter if you set the linkage up using the alignment pin. Sometimes one rod has to be slightly longer to stop grinding.
 
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