Toronado.org

Hello , i'm looking for a new th425 transmission for my 66' toronado who can handle around 550hp/600 tq.

I have found the manny trovao shop on internet,he was ok to do it but i can't contact him anymore since some months by email and my english spoken isn't accurate.
Is anyone know him or knows a good transmission shop ?
I'm in oversea so i'm looking for a good quality part for this project.

I had an account here but i can't retrieve it.

I used Manny and had an excellent experience in all. I highly recommend him.

As for contacting him you will have to keep trying.

Regarding your power/torque figures I have to say I am interested in how you area accomplishing this.

I have EFI, the Rockwell intake, the Mondello RH-94-95 Roller cam in my car. I have no idea yet how much it puts out, but I have no fear that the trans will take it as long as the shifts are not too hard - hard shifts really kill that link belt over time. It is the only abuse it does not like (assuming adequate lubrication, of course).

Where do you get your power figures from, and what cam and intake are you using to get these figures?

The transmission internals of the TH425 are exceedingly similar to the internals of the rear-drive TH400. A 400 can be built to take an insane amount of power.

That leaves the chain drive on the input side, and the differential on the output side, as potential trouble-spots. I'm told the '68-newer differential is stronger than the '66--'67.

A high-stall converter will ease the shock loads on the chain drive, as will NOT using a harsh shift-kit. I'm not sure how much power a switch-pitch torque converter system will take--I suspect you're at or beyond the capacity of those small stator splines.

thanks you for your answers,i forget to update this topic.I finally contact manny and he built me a strong th425.
Here's the informations about the trans :

Overhaul kit with Alto Red frictions
Apply piston housings
34 Element Sprag for intermediate clutch
Low roller clutch
Heavy duty front band
Detent Solenoid
Stator solenoid
Governor tube filters, speedo bushing, viton o-rings
Center support machining
Governor gear
Speedometer gear
Stator tube
Thrust washer kit
Stainless hardware kit
Steel plates and waves kit
Bearing kit
Bushing kit
Oil ring kit
Valve body spring kit
3/8 fittings and vent elbow kit
Sprocket bearings
Center support bronze bushings
Billet forward hub with Torrington bearing
H/D S/P torque converter with six lugs

And about the engine, it makes 488hp/574tq on dyno with this ,it's running on E85

452ci
Racetec pistons, 4032 material, 4.155 bore, 1.5, 1.5, 3.0 ring pack
Scat BBC 6.800 H beam rods
12.0:1 compression
Edelbrock Performer with the center divider cut 1/2" from the bottom.
Quick Fuel E85 750cfm carb (it's really about 780cfm)
MSD pro billet distributor
Edelbrock heads, 2.125 intake, 1.68 exhaust /porting on the intake side.
HV pump
Toro pan
ARP Studs and straps
Lunati Hyd roller;
234/238@.050
.555/.565 lift with 1.6 rockers
Full roller rockers
Restricted 3/8 one piece pushrods

Interesting. I assume you had to cut a hole in the hood to allow clearance for the intake? Any pics? What are the Power and Torque Peak RPM values? Did you install Headers?

My cam is not quite as aggressive as yours, but it is close. I do not have the intake or exhaust to allow it to breath properly so I am no doubt limited by that as well. Not to mention I am not running E85 so my 10:1 compression is resulting in detonation at timing advances above roughly 30 degrees. This is robbing me of much power, and my intent is to install Water/Methanol injection this spring to address this and finally see what it is like with full power.

Given what you spent on the motor I am surprised you did not go EFI. It is far superior in my opinion to a carb as you can easily adjust it, no cold start issues, and I can set the timing from inside the car - you already seem to have the distributor you need to go with the MSD Atomic EFI, so what is another $2k - $3K when you are this deep anyway? Give it some thought, you will not regret it if you do it.

yes xgecko i had a scoop when i import the toronado so i got the extra clearance for this intake.I tried to find headers but there is no one who is working, i'll do custom headers in future,the stock exhaust manifolds are killing this engine performance.
We got a lot of e85 in France so i use it , i did a complete strong fuel system with ptfe hose/qf30-230.
About the EFI i choose to stay on carb , i don't want to modernize too much this old lady, it's not really about price.
I bought an accusump too ,i'll post pic's in end of february when i come back to home.

really cool thread...can you be more specific on the transmission build?

i also built a performance toro engine just like yours but with stock intake and still stock exhaust manifolds so far...gonna build custom headers soon. buddy from the US built his own headers for a 1971 (have some pics but they are too large to attach)

applied GMC sells the headers he started with

here are some pics

more

and more