A518/46RH/48RE Overdrive Transmissions

[Hemirunner]

Are there any good sources for education on these transmissions and their differences? I’d like to use a fully electronic version in a high horsepower street/strip application and control it with the transmission ICF on the EFI system.

 

[451Mopar]

The RH shifts using the hydraulic governor, RE uses the electronic(s) PWM pressure solenoid, pressure sensor, speed sensor, and other inputs to the computer.
Overdrive and converter lockup are just controlled on/off by their solenoids.

 

[F4R/T]

I find less electronics the better so I would rule out the RE series. You want it to think for itself and overdrive and lock up is just a matter of a minor wiring and pressure switches.

 

[azmoparboy]

I find less electronics the better so I would rule out the RE series. You want it to think for itself and overdrive and lock up is just a matter of a minor wiring and pressure switches.

Hi, I just pulled the trigger on a 46RH from a company call PATC Transmissions. Their website has all the information you need to move forward with your decision and direction for your project. They can make a Transmission to the horse power and torque for you engine combination. The last thing you want to do is take a small block application transmission and tie it to an engine that will tear the guts out of it.

Hope this helps,
Azmoparboy

 

[ckessel]

The RH units were used up to 95, RE's are 96 on. If it's going behind a b/hemi, see if you can get one from a V10 or Cummins application. The internals are like comparing a Hemi tf to a smallblock unit. More clutches, wider drums, more planetaries etc. You still need to lop off the bell section of course. Some of the early units were also non lock up giving you the freedom of converter usage without the higher cost of a lock up unit. If you do go lockup, get with a converter company to put one together for your application.

 

[Hemirunner]

I’m currently running a built 727 and I’ve replaced everything with aftermarket internals to support the power level I’m at now (1200whp) and I’d do the same for the OD version. I’m looking to know if that aftermarket support is there for these units and what power levels they’re successfully supporting. As far as the fully electronic unit, that would be my preference as I can build an operational map to govern shift points and converter lockup which would be ideal.

 

[Dipstick]

This multi-part video claims 1000hp capability.

 

[DGE330/NC]

I’m currently running a built 727 and I’ve replaced everything with aftermarket internals to support the power level I’m at now (1200whp) and I’d do the same for the OD version. I’m looking to know if that aftermarket support is there for these units and what power levels they’re successfully supporting. As far as the fully electronic unit, that would be my preference as I can build an operational map to govern shift points and converter lockup which would be ideal.

John Cope Racing Transmissions would be a guy to contact for info

 

[furious70]

Sound German automotive does more nag1/TF-8 but they list RE as well. Russell is a good dude there.

 

[ckessel]

Since you are that extreme on the power, look into the diesel specialty companies. Suncoast, Goerend transmissions and some others. ATS on that end is not recommended. Very poor customer service. The diesel units have to put up with that much hp plus way beyond on the torque end.

 

[F4R/T]

Cope is very sharp on mopar trannies, A&A and 727 specialist all do very well too. I’d personally rather see a truck OD in a b body than a Nag1... Simplicity always wins when you’re in the middle of nowhere and it lets you sit...Modern day aftermarket computers made in China offer no reliability just a low price and maximum profit. Just my opinion.

 

[furious70]

There are many vendors servicing nag1/tf8, more than RE probably at this point

 

[451Mopar]

There is alot of support / aftermarket for the TorqueFlight transmissions, Mostly for the 47/48RE used in the Diesel trucks. Some of those are around 2,000 ft/lbs torque?
I think the JW Ultra-bell housing is the prefered way to put the Overdrive units behind a big block. The JVX adaptor plate is another option, but spaces everything a 1/2" futher back, and uses a special flexplate with starter ring gear and 1/2" crank spacer.

 

[Hemirunner]

There is alot of support / aftermarket for the TorqueFlight transmissions, Mostly for the 47/48RE used in the Diesel trucks. Some of those are around 2,000 ft/lbs torque?
I think the JW Ultra-bell housing is the prefered way to put the Overdrive units behind a big block. The JVX adaptor plate is another option, but spaces everything a 1/2" futher back, and uses a special flexplate with starter ring gear and 1/2" crank spacer.

Excellent info. I’ve only seen the adapter plate kits. I’m assuming the JW bell used is the BB to 727 version?

 

[DGE330/NC]

Excellent info. I’ve only seen the adapter plate kits. I’m assuming the JW bell used is the BB to 727 version?

if you are looking for the spacer kit for BB to SB there is a local engine builder to me that has one for sale

 

[ckessel]

Excellent info. I’ve only seen the adapter plate kits. I’m assuming the JW bell used is the BB to 727 version?

Yes. You lop off the bell section of the donor unit so the JW one can bolt to the pump housing. It's like the Clutch Flites from the 60's before Lenco came out with their units for drag usage. Clutch Flites were used quite a bit.