Due to the extremely small group that race 4 speeds, I just want to see what your setup is.

Looking for setups that have a A-833 4 speed
Stock Syncros (not a crash box).

Are you powershifting each gear? What RPM? 23 or 18 spline
What fluid are you using? How much fluid?
What type of clutch?
What weight?
What RPM are you launching at?
Tires spinning at the line or clutch slipping?

I'm leaving around 6,000 with a 23 spline 2.65 1st gear.
Shift around 6,200
Traps around 6,400
Tires spin, clutch is a dual disc McLeod RST (doesn't slip)
Weight about 3400 with me in it
Powershift all gears
Fluid is currently Passon Lube 4 quarts plus a little more to get it up just below the fill plug

Larry, what tires ? 6000rpm launch ... yikes ...

MT ET streets 28x10.5

Yeah, but 6,000rpm makes for quite a fun ride!
Seriously, the car kept 60' better and better the higher I went. I've played with the shock settings a bit, tire pressure, and spring clampings along with launch rpm. I normally launch between 5,600 and 6,000rpm right now.

We have a 70 RR currently with a Performance Only 452. 23 spline 833, no mods. 4.3 S60 with a true trac. Tim Hyatt built Mcleod based Soft-Lock clutch. Still playing around with clutch settings, have been dropping base pressure to as low as 3 turns.

Original 383 rear leaf springs, have been clamping them and breaking 3/8" Grade 8 bolts on the clamps so clamping must be doing something. Shocks are stock from Advance Auto (I think, bought them when on a trip up to Babylon a few years back). Tires are Hoosier 9x29x15, D07 compound. Just getting used to those. Before were 9x28x15 D06 compound.

Typically I launch 5000, 5500 hundred (no two step or anything) Generally if anything have wheelspin issues.

Plan to add frame connectors when the engine comes out to fix the roller lifter that got lunched.

Best time is 11.67 at around 120. 60 ft's down in the 1.61 range,although it claimed 1.45 once but I have to believe that was a timing light glitch.

Car could really use cal-tracs and I am sure new springs and adjustable shocks.

The front suspension is the same stock shocks and I have 1" torsion bars for our streets down here. I do drop the front end down until the bump stops are maybe 1/2" off the frame

Tranny oil is 80-90 gear oil, Coastal brand I think.

It is a blast, no way am I going auto.

How long that 23 spline will continue to last in a 3800 pound RR time will tell. I am sure the Tim Hyatt clutch is a big factor in the tranny living. A Jerico or Nash would be nice eventually. I have no problem with non-synchro transmissions, either on the street or the track (actually would prefer it, but currently own the 833).

On the street I just tighten up the clutch and put the street tires on. Sometimes I even put the mufflers back on.

A synchro'd 833 is going to be one big PITA on a real racecar. You will have NO consistency. Even though they are strong, they were the worst shifting 4 speeds of all musclecars back in the day... They were slick shifting these things almost from their inception...



MB

23 Spline , center force clutch.Leave off a 2 step at 3500 rpm and runs 60 fts in the low to mid 1.6s on a 27/10 et street with caltracs and factory leafsprings.Has qa1 adj shocks all the way around. I shift at 7200 to 7400 with 4.10s and run 126 mph at 3470.Still a factory setup trans .

Power level and e/t may be good ones to add in here as well...This past years setup is in my sig- junkyard bottom end 360 making maybe 320 to the wheels at the most based on e/t and mph calcs.

23 spline, powershifting every gear at the track
Launching at 5k (didnt like 5500, so i went back down) shifting around 6-6100 (light is set at 5900)
Trapping at about 5500 (needs more gear)
3400lb car with me in it
Using a Centerforce Dual Friction
28x12.5 et streets, stock 6cyl springs and the full caltrac setup, not spinning much (maybe 1 turn?)
For fluid I tried a bunch...right now running Castrol Type F in it, but im thinking of running heavy gear oil in it this upcoming season...
transmission was always popping out of 2nd on decel and sometimes crunching on the 2-3 powershift towards the end of the season...picking a backup transmission up soon, and im going to refresh both over the winter

This thing is never getting an auto

How do the centerforce df clutch work? does it slip and how fast does it wear out?

Original stock 4 speed 23 spline
Power shifting at 62-6500 RPM
Launching at 38-4000 (didnt like anything above 4500) 1.62 60ft best.
original leafs with one full leaf added and clamped
DF Centerforce the best non-ajustable street and strip clutch set up so far.
Tires spin very little.
80-90 lube non syn
best 7.52@ 93 mph 1/8 mile, should go high 11's in 1/4?
3350 with me in it

Not at the track enough to get real consistant, but a blast to drive

Great stuff guys. Glad to see my dad and I aren't the only ones out there pounding on a "stock" A-833.

I agree that they aren't the most consistent trans due to the syncros, but being that they are street cars, downshifting is a must.

We only go to the track a few times a year to have fun.

Rowing these gears is the best way to enjoy your car if you ask me. I changed to a 833 (18spline)couple of years ago resulting in breaking teeth of the gears, ruining clutches while trying different setups but all without any real luck. This all was with my street/strip challenger with 528 Hemi running 10's.

In the end bite the bullet and got myself a tubechassis car and bought a GForce 4-speed and custom AC clutch setup to put behind the same pumpgas street engine.
Results; 8,9's and it's still alive

Can't improve the funfactor

My setup is:

65 Belvedere II
65 A833 w/ ball and trunion
RXT twin Disc
Launch at 3400-3500 slipping the clutch
Goes like 1.70 60ft
Usually shift it at 7200
80w90 gear oil in Trans

All of this behind a 496 B motor, it usually runs around 11.1x at around 125-126.

When I really get after it on the launch it breaks something, last time out I put the 2 step to 5500 and it broke the spring perches clean off of the rear end.

Power shifting that thing with that gear oil and at 7k+rpm?
18 or 23 spline?

Larry look up Mike Laboda he runs a group called UMTR.United Manual Trans Racing group
They can help you with all of this

I talk to Mike when I see him at the track and I've run one UMTR event before (runner up).

Most of those guys all run "race only" setups. Crash boxes and aftermarket transmissions for racing.

I'm looking more at "Stock" A-833 racers....kind of a small exclusive group of us!

Mine is super slow (low 14's high 13's) but it has a stock A833 with 90W, RAM clutch, and is launched off idle or very low rpm's (rock hard radial street tires)and gets really bad 60 foot times. LOL. Car weight is 3,400 pounds, and is shifted at around 5,500 RPM.

http://www.youtube.com/watch?v=2XBnEmcYS4c

Seeing as how my son started this post I'll drop my combo for all to scrutinize.
engine 446 ci big block
car 68 Roadrunner
weight 3926 with me in the seat
Trans is stock 23 spline A833 no mods.
trans fluid ATF dextron
Launch rpm 49-5600 rpm depending on track conditions.
shift 6400 rpm
trap rpm 6300
slick pressure anywhere from 15 - 19 psi
rear gear 4.56 Dana
Clutch is Center Force Dual Friction 11" with aluminum flywheel (13 pounds)
best et and mph is signature

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