I recall I heard they are not, but just confirming. Thanks!
Are A833 gears synchronized?
- Thread starter Bleep Bleep
- Start date
Yes.
All but reverse.
33 IMP
Well-Known Member
- Local time
- 4:34 AM
- Joined
- Dec 21, 2017
- Messages
- 13,210
- Reaction score
- 21,833
- Location
- taxifornia,soon 2b Arizona.
Yep, all forward gears are synchro. If they weren't, you'd know it!
The older three-on-the-tree three speeds often didn't have sychros on first gear. Had to stop or double clutch to get first while moving.
My 33 Imperial boxes are full crash box. Double clutch or time rpm for all shifts, up or down.
The older three-on-the-tree three speeds often didn't have sychros on first gear. Had to stop or double clutch to get first while moving.
My 33 Imperial boxes are full crash box. Double clutch or time rpm for all shifts, up or down.
Senior moment (again).
Wrong question. Rev matching when downshifting doesn’t make it any easier to engage the next lower gear? Feels like the same amount of force regardless of attempting to blip the throttle.
Wrong question. Rev matching when downshifting doesn’t make it any easier to engage the next lower gear? Feels like the same amount of force regardless of attempting to blip the throttle.
- Local time
- 7:34 AM
- Joined
- Jan 29, 2018
- Messages
- 22,016
- Reaction score
- 78,573
- Location
- Midland Ontario, Canada
Clutches are for starting and stopping! LOL I was driving a milk truck at 15 years old, before the old man let me buy the Bee off him. I drove it, and still do, the same way as the milk truck for the past 45+ years. (Can't do it with the HP2, or at least not yet. Not sure if it's the trans or it's oil).
33 IMP
Well-Known Member
- Local time
- 4:34 AM
- Joined
- Dec 21, 2017
- Messages
- 13,210
- Reaction score
- 21,833
- Location
- taxifornia,soon 2b Arizona.
Kinda surprised it blew. I would have expected a bad clash noise, but not destruction.
I've been driving my no-sychro 33 for 40 years, and I still miss a gear (CLASH!) now and then.
sam dupont
Well-Known Member
Ahh the beauty of a honkin 67 Charger ..
- Local time
- 6:34 AM
- Joined
- Jul 1, 2015
- Messages
- 5,556
- Reaction score
- 6,932
The gears, both on the main shaft AND their corresponding gears on the counter shaft (with the exception of the reverse idler gear) are in constant mesh. It's the synchro rings and sliding sleeve that couple the appropriate synchros to the gear selected take the abuse The grinding noise one hears or feels when a shift is missed is the synchro sliding sleeve and brass synchro teeth not meshing. The gears do not grind only the synchro mechanisms, (the spring loaded slipper or brass pawls and the brass synchro teeth)........just my interpretation and opinion......
BOB RENTON
Thanks Bob for the detail.
“Clutches are for starting and stopping! LOL”
Jap engineering I guess but never used the clutch upshifting on the track. Unload the trans for a split second all it took. Of course then the ‘throw’ was a little shorter.
Jap engineering I guess but never used the clutch upshifting on the track. Unload the trans for a split second all it took. Of course then the ‘throw’ was a little shorter.
- Local time
- 7:34 AM
- Joined
- Dec 31, 2020
- Messages
- 8,561
- Reaction score
- 20,249
- Location
- Ontario, Canada
Back in the '60's, the synchro's were modified in race A-833's to allow no clutch shifting between gears. If you listened to Ronnie Sox rowing his way through a 4-speed, shifts were as quick as any automatic.
sam dupont
Well-Known Member
Inland shifter and through Hemi mufflers
On the A833 if the linkage is in proper adjustment, should the effort to engage the downshift gear essentially match effort for upshifts?
It was my first Mopar stick but downshifts at times were noticeably more effort than upshifting. That’s why I wondered if it was a rev matching issue. Sometimes the trans would even ‘refuse’ to engage the gear for a moment or two.
Driver error, linkage adjustment, technique for this transmission?
It was my first Mopar stick but downshifts at times were noticeably more effort than upshifting. That’s why I wondered if it was a rev matching issue. Sometimes the trans would even ‘refuse’ to engage the gear for a moment or two.
Driver error, linkage adjustment, technique for this transmission?
If you make no effort at rev matching or slowing down on a downshift the synchro will have to do more work and require a little more shift effort (for synchro ring friction) to speed up the gear train so the slider teeth, synchro teeth and gear engagement teeth can all be synchronized and the slider can lock them all together. Basically it makes the brass synchro rings work harder which will eventually wear them out a little faster.
padam
Well-Known Member
On a downshift the syncros have more work to do. Just shift a little slower.
Your clutch may need a little more departure.
Your clutch may need a little more departure.
- Local time
- 6:34 AM
- Joined
- Jul 1, 2015
- Messages
- 5,556
- Reaction score
- 6,932
The usual way to modify a 4 speed transmission was to grind every other tooth off of the gears's brass synchro ring on the main shaft gear (2-3-4) and grind a steep bevel angle on the brass sliding sleeve on the corresponding main shaft coupling to allow the operator to shift without using the clutch between shifts. If the sliding coupling sleeve hung up, it had a tendency to wipe the remaining brass teeth off the drive gear, requiring a transmission rebuild. This abuse saved a couple of tenths off the time slip....but usually required replacing the trans.......YES....Ronny Sox could shift an A833 faster than a TF 727B shifted.......
BOB RENTON
Actually on a downshift the synchro friction is having to drag up in revs, the engine mass through the input, to match the gearbox/driveline speed. And in effect it drags down the car speed some too. Not speed up the drivetrain which I incorrectly said above. Too anxious to get to the Super Bowl. 
Similar threads
