The level 2 Viper transmission comes with all four sets of Alto Red Eagle clutches with Kolene steels plus a direct clutch PowerPack, a Fairbanks TransAction Kit, Sonnax high performance low / reverse servo, Carbon fiber band and a heavy duty intermediate band strut. The heavy duty / high performance torque converter that comes with this package deal can be ordered in stall speeds up to 2800 RPM (gas #6D). This transmission (518, 618, 46RE, 47RE) is good for any type heavy duty / high performance use up to 500 (gas) horse power using pump gasoline, towing, 4WD, high performance and others. Add torque converter upgrade if needed. The Viper transmission has 7 major performance upgrades. All of this can be yours without a trade-in for $2299.00. Add $250.00 for a Diesel or V10. Add $100.00 for 1996 up 4WD. Add $399.00 for a diesel single clutch billet converter and $823.00 for a diesel triple clutch billet converter. Add $334.00 for a gas single clutch billet converter. The freight runs from free to $165.00 after freight discount in most cases. Click on the pictures below to see the Viper performance upgrades.

Performance Automotive and Transmission Center offers our high performance / heavy duty Dodge rear-wheel-drive transmissions on the web. This transmission can be installed in older 3-speed non-computer cars and trucks for a 30 to 40% increase in gas mileage on the road.

There will be a $175.00 core charge added to all Dodge diesel torque converters.

The level 3 Mega Viper transmission comes with all four sets of Alto Red Eagle clutches and Kolene steels plus a direct clutch PowerPack, high capacity 5 clutch direct clutch drum, a Fairbanks TransAction Kit, performance 3-4 accumulator spring for a firmer shift into overdrive, high performance low / reverse servo, cast aluminum accumulator piston, performance intermediate servo cover, Mopar 5 to 1 intermediate band apply lever (4.2 gas) giving an extra 31% torque holding capacity in second gear on diesel models, extreme duty brass impregnated carbon fiber flex band and a heavy duty intermediate band strut. A special manual valve allows converter fluid charge in park. It has the stronger Mega Spring for overdrive direct clutch apply with more holding power in reverse, 1st, 2nd and 3rd. The heavy duty / high performance torque converter that comes with this package deal can be ordered in stall speeds up to 2800 RPM for gas motors. The diesel transmission comes with our triple clutch billet converter. This transmission (518, 46 RH / RE) is good for any type heavy duty / high performance use up to 700 (gas) horse power using pump gasoline, towing, 4WD, high performance and others. The Mega Viper transmission has 14 major performance upgrades. All of this can be yours without a trade-in for $2599.00 on gas units and $3571.00 for the diesel or V10 transmission with a triple clutch billet converter. Add $334.00 for a gas single clutch billet converter. Add $100.00 for 1996 up 4WD. The freight runs from free to $165.00 after freight discount in most cases. Click on the pictures below to see the differences between the level 2 Viper transmission and the level 3 Mega Viper transmission.

After building hundreds of our level 2 Viper transmissions over the past few years it's time to go to the next level, the level 3 Mega Viper. This transmission can be built for both gas and diesel applications. This transmission can be installed in the place of a 3 speed transmission in older non-computer cars and trucks for a 30 to 40% increase in gas mileage on the road.

Add a billet input shaft to the level 3 Mega Viper if needed for $629.00. Diesel triple clutch billet converter with the billet stator option can be added for $250.00.

There will be a $175.00 core charge added to all Dodge diesel torque converters.

Buy a Viper, Mega Viper or RAMZILLA transmission and torque converter anytime during 2009 and receive your choice of a PATC fluid temperature gauge, transmission cooler or PATC Racing T-shirt Free !

  Free Freight Deal !  Extended for an indefinite period of time! Buy any performance / heavy duty overdrive transmission and torque converter and we'll pay up to $110.00 on the freight.

Convert your 3 speed to a 518 overdrive transmission, click here.

Dodge RWD Overdrive Instructions

The level 4 RAMZILLA transmission comes with four sets of Alto Red Eagle clutches and Kolene steels plus a direct 7 clutch PowerPack, high capacity extreme duty billet 5 clutch direct clutch drum as found in 48RE transmissions (7 clutches with the PowerPack), 7 overdrive clutches - - a 40 to 75% increase in apply area, 5 forward clutches which is 25% more clutch apply area than a 48RE, 22% more total clutch apply area than a 47RE transmission, all three 48RE 6 pinion planet gears, front, rear and overdrive, the .055" thicker 48RE sun gear shell, the one piece Sonnax 300M hard input shaft and hub, a Fairbanks TransAction Kit (Transgo in 48RE), performance 3-4 accumulator spring for a firmer shift into overdrive, high performance low / reverse servo, cast aluminum accumulator piston, performance intermediate servo cover, a 5 to 1 intermediate band apply lever (4.2 gas) giving an extra 31% torque holding capacity in second gear on diesel models, extreme duty brass impregnated carbon fiber flex band and a heavy duty intermediate band strut. A special manual valve allows converter fluid charge in park. It has the stronger Mega Spring for overdrive direct clutch apply with more holding power in reverse 1st, 2nd and 3rd. It comes complete with a deep finned cast aluminum pan that holds 2 extra quarts of fluid. The heavy duty / high performance torque converter that comes with this package deal can be ordered in stall speeds up to 5000 RPM for gas motors. The diesel transmission comes with our triple clutch billet converter with over 200% larger clutch apply area. This transmission is good for any type heavy duty / high performance use up to 800+ (gas) horse power using pump gasoline, towing, 4WD, high performance and others. The diesel version is good for over 1000 torque. The RAMZILLA transmission has 20 major performance upgrades. The best 48RE transmission on the planet can be yours without a trade-in for $5230.00 ($4230.00 with trade-in, see below), the gas 48RE transmission with a 10 inch billet lock-up torque converter or diesel / V10 48RE transmission with a triple clutch billet converter. Gas or diesel, 2WD or 4WD. The freight runs from free to $165.00 after freight discount in most cases. Click on the pictures below to see the differences between the level 3 Mega Viper transmission and the level 4 Ramzilla transmission.

If you have a 48RE transmission to trade-in, in buildable condition you will receive a $1000.00 trade-in credit less the freight to get it here.

The level 5 RAMZILLA transmission comes with everything in the level 4 RAMZILLA transmission plus the #8X6 Big Daddy direct drum with 55% more piston apply area! This results in 55% greater clamping force and the #7R Extreme Duty hard intermediate shaft. Add $1199.00 to the level 4 price. Diesel triple clutch billet converter with the billet stator option can be added for $250.00.

There will be a $175.00 core charge added to all Dodge diesel torque converters.

#6D. 500 / 518 / 727 / 904 / 46RE/RH (Not diesel, 618 or 47RE/RH), Viper Series Torque Converters. Your choice of stall speeds up to 2800 RPM. These converters have all bearing construction and a much better than stock clutch. Non-Lock-Up Cost $315.00. Lock-Up Cost $315.00.

#6V. Eleven inch billet lock-up torque converter for 518 and 46RE transmissions. This converter comes with a dual bolt pattern for both new and old style bolt patterns. We will call you to get motor type, year and horse power. Will not fit a 1995 back 360 motor. Cost $649.00 Qty 1 2 3 Stall Speed 1600 1800 2000 2300 2600 2800

√ #6B. Billet 10 inch lock-up converter with a 12 inch clutch for the 46RH / RE transmissions. Shown without the ring gear. Cost $1065.00 Qty 123 Stall Speed 2000220024002600280030003200340036003800

#6DB. Four torque converter bolts for #6D converters. 8MM bolt with 14MM head. Cost $6.00. Qty 1 2 3 4 5

#NLUD and #LUD. Heavy duty Cummins diesel torque converters, used on our level 2 Viper transmission. Cost non-lock-up $399.00. Cost lock-up $499.00.

There will be a $175.00 core charge added to all Dodge diesel torque converters.

To buy this converter you must have a core to send to us.

#8DX. Cummins Diesel single clutch billet converter. Cost $750.00

There will be a $175.00 core charge added to all Dodge diesel torque converters.

√ #8DXX. " Triple-Disk " Cummins Diesel triple clutch billet converter with over 200% larger clutch apply area. Cost $1175.00. Can be ordered in a lower stall speed with the billet stator option.

. . . . . This torque converter can be built with higher stall speeds for the V-10 Viper motor in a SRT-10 Dodge pickup truck . . . . .

" Triple-Disk " Triple Clutch Torque Converter

Torque Converter Installation Instructions

#7D. 518 / 727, Check it out ! 9 inch converter can be ordered in stall speeds of 2600 to 6000 RPM. Rated at 800 horse power. Cost $749.00

PATC 727 to 518 Conversion Kit #727518. With these four parts you can convert your 727 transmission to a 518 overdrive transmission with locking torque converter. Lets say you drive an average of 400 highway miles per week, at that rate you could save as much as $1000.00 per year on gas, not to mention the 31% reduction in RPM. Your new 518 will have automatic shifts into overdrive and lock-up, no toggle switch needed. Now with adjustable vacuum switch. The instructions are at the bottom of this page. (11-25-06. I just saw this kit on the Internet by the copy cat competition for $1654.00.) Cost $85.00 Qty 12345 Overdrive 44 MPH48 MPH Converter Lock-Up 50 MPH52 MPH

Dodge RWD Overdrive Instructions

Dodge 518 Conversion

This is how to replace your three speed transmission with a 1995 back A518 overdrive transmission with a three wire connector (gas). A 518 transmission has a 31% overdrive and will produce a 30 to 40% increase in gas mileage on the road over a three speed transmission. Remember overdrive is only 3rd gear high range anyway. There are two wire 518 transmissions out there, these have a non-lock-up torque converter. With this three wire setup you have a four speed transmission plus a torque converter lock-up feature. The extra gear is 3rd high range. We've been asked this question for years, so I decided to put it down in black and white. What we're actually going to do here is control the overdrive and torque converter lock-up normally controlled by the computer using one vacuum and two oil pressure switch. Instead of using an electronic speed sensor and throttle position sensor we will use a mechanical / hydraulic / electronic speed sensor and a vacuum / electronic throttle position sensor. This will be accomplished with the use of three GM parts and some trick wiring. The Chevy and Ford guys make the swap to overdrive all the time, it's time for the Dodge people to have the same option. Lets say you drive an average of 400 highway miles per week, at that rate you could save as much as $1000.00 per year on gas. This can be made to work with a diesel motor also with or without a vacuum pump and vacuum regulator.

#1. The center wire on the transmission is the hot wire and the two other wires are ground wires for overdrive and the lock-up torque converter. The front wire is the overdrive ground and the rear wire is the torque converter lock-up ground. You can get a three wire female connector from a junk yard or buy one from us.

#2. Run a 12 volt fused wire that turns on and off with the key to the vacuum switch, then to the center wire on the transmission connector. This is a normally open vacuum switch that takes 7 inches or more of vacuum to shift into overdrive and lock-up the torque converter and 3 inches or less of vacuum to down shift and unlock the torque converter. Lets say you're in overdrive going 54 miles per hour at very light throttle, when you press on the throttle and the vacuum drops below 3 inches the transmission will immediately shift back to 3rd gear low range without lock-up or even a lower gear depending on the throttle position.

#3. At the governor pressure tap on the transmission install a tee fitting for two oil pressure switches. Say a 44 PSI oil pressure switch for overdrive and a 52 PSI oil pressure switch for the torque converter lock-up. Or any other combination of switches you may want. At light throttle the transmission will shift into overdrive at 44 MPH and the torque converter will lock-up at 52 MPH. The pressure switches go on the outside of the transmission case in the governor pressure port. It's located on the right side, at the upper rear of the main transmission case. The figures on the pressure switch will only be correct if you have a stock tire size and rear end ratio.

#4. Run a wire from the front pin on the transmission connector to the 44 PSI oil pressure switch and a second wire from the rear pin on the transmission connector to the 52 PSI oil pressure switch. Now at 52 MPH when you step on the gas the transmission will shift back to third gear and the torque converter will unlock at the same time. It can't get any easier than this.

#5. Install a toggle switch in the overdrive ground wire. When the switch is turned off you will have 1st, 2nd and 3rd low range, exactly like a 727 transmission with the same ratios. When the switch is turned on you will have 1st, 2nd  and 3rd gear low range plus 3rd high range. When the toggle switch is on the transmission will immediately shift into overdrive at light throttle over 44 miles per hour whenever it’s in drive range on the gear selector. Once in overdrive the transmission will not come out of overdrive until the overdrive solenoid is turned off, or the vehicle speed goes below 44 miles per hour, or the vacuum drops below 3 inches. The only electronic parts on a 518 transmission are the overdrive and torque converter lock-up solenoids.

NOTE: People make this swap all the time, but I've never heard of anyone doing it correctly. They drive down the street flipping a toggle switch on and off at every stop. This setup works automatically.

NOTE: The way governor pressure works is 1 pound of pressure per square inch equals 1 mile per hour unless someone has changed the tire size, or rear end ratio, or governor springs and weights. The vacuum switch acts as a throttle position sensor and the oil pressure switch acts as a speed sensor.

NOTE: Use a lock-up type torque converter if possible, this could get you as much as 5% better gas mileage and the transmission will run much cooler. Running cooler will make the transmission last longer.

NOTE: You can also run the torque converter ground wire through the brake switch if needed.

The #4 tap is the correct one.

Throttle Valve Adjustment

#6. A 518 transmission has a throttle valve cable (pressure cable), it must be hooked up and adjusted correctly. You can get the cable and brackets from a junk yard. If you have a 727 transmission now this linkage may work. The correct adjustment on the T V cable or linkage is minimum throttle pressure at minimum throttle. In other words no slack in the cable at idle and it must start to pull immediately off of idle.

Other Modifications

#7. When going from a 727 transmission to a 518 transmission the driveshaft will need to be cut about 3 and 1/2 inches. The swap may require some driveshaft tunnel modification on some cars. You will have to fabricate a new crossmember using the old crossmember ends because the transmission mount is lower on a 518 transmission than a 727 transmission. The stock Dodge truck mount is very tall, some extra room can be gained by using a biscuit-type Camaro or Mustang mount. See pictures below. In the 1st picture notice the 518 transmission has a larger tail area. The second picture is the crossmember ends cut off ready to be reused. In the 3rd picture notice the transmission mount area has been lowered.

The 3 above pictures are a 1970 Dodge Dart Swinger A-Body.

Incase you haven't noticed Chrysler Cars are the hottest thing going on the market as witnessed by the 1970 Plymouth Hemi Cuda that sold for $2,000,000.00 at the Barrett-Jackson auction on 1-21-2006.

#79TV. 518 / 618 Lokar Throttle Valve Cable. Cost $76.00 Qty 1 2 3 4 5

#79M. This is a 1" tall transmission mount. (OUT OF STOCK) Cost $35.00 Qty 1 2 3 4 5

PATC 727 to 518 Conversion Kit #727518. With these four parts you can convert your 727 transmission to a 518 overdrive transmission with locking torque converter. Lets say you drive an average of 400 highway miles per week, at that rate you could save as much as $1000.00 per year on gas, not to mention the 31% reduction in RPM. Your new 518 will have automatic shifts into overdrive and lock-up, no toggle switch needed. Now with adjustable vacuum switch. The instructions are at the bottom of this page. (11-25-06. I just saw this kit on the Internet by the copy cat competition for $1654.00.) Cost $85.00 Qty 12345 Overdrive 44 MPH48 MPH Converter Lock-Up 50 MPH52 MPH

#79M2. 518 / 618 two wire Pigtail connector for overdrive. This part has never been available before. Cost $35.00 Qty 12345

#79M. 518, three wire Pigtail connector for overdrive and lock-up. Cost $20.00 Qty 1 2 3 4 5

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