700R4 Conversion Kits for Early GM Cars and Trucks in Five 700R4 Levels and Price Points Starting at $2207

$ 2207.00

700R4 Conversion Kit for Early GM Cars and Trucks in 5 700R4 Levels and Price Points. Complete with everything but the driveshaft. You pick the power level for the transmission and the crossmember is determined by the vehicle type. We are PATC the company that developed Performance and Heavy Duty 700R4 transmissions since 1991. PATC has developed or had a hand in developing almost every performance and heavy duty part in 700R4 transmissions. Too many parts to show, see chart below. Special output shafts and tail housings on 4WD’s and 2WD’s are extra. Transmission adapters, flexplates and pan upgrades are extra. You get everything listed on your level transmission plus a crossmember and speedometer gears. Also there are other options you can select before checkout.

Transmission Level ? *

Upgrade Price from Level 1.

2WD or 4WD ? *

Vehicle Type ? *

Used to make sure you get the correct conversion crossmember and parts

Planet Gear Upgrade ? *

Upgrade to 6 Pinion Front Power Gear on Levels 1, 2, 3 or 4.

Stall Speed ? *

Torque Converter Number ? *

Torque converter type on level 4 and 5?

Powder Coat ? *

Free T-Shirt ! *

Free Gift ! *

Motor ? *

Flywheel Horse Power ? *

Power Level ? *

I understand flywheel power levels are not correct for SuperChargers, Turbos, Nitrous and 4WD’s with oversize tires.

Transmission Cooling ? *

I understand the transmission must have a water transmission cooler in the radiator.

Speedometer Gear Information ? *

We need the tire height and rear end ratio for the Speedometer Gears. (type in box)

Adapter for BPO Motor ? *

Carburetor Type ? *


Our level one “Stock Plus” 700R4 transmissions are built from 1987 to 1992 cores, known to be the best. These transmissions have Alto clutches, a Corvette Servo and our oversize Mega Valve installed. You also get a 29 element Borg Warner forward sprag and a quality built torque converter with your choice of stall speeds of 1600 to 2000 RPM’s. No trade-in required. This transmission is for any type use up to 350 horsepower and 300 torque with non-supercharged systems using pump gasoline.

Our level two “700 Raptor Junior” 700R4 transmission comes with a high performance Superior intermediate billet servo that has 35% more holding power than a Corvette servo. It will give a firmer 1-2 and 2-3 shift. It also has a high performance Superior overdrive billet servo with 50% more holding power than the stock overdrive servo. This servo gives a firmer 3-4 shift. Our level two 700R4 comes with “The Beast” reaction shell, the Mega Valve and an oversize low / reverse boost valve, these two valve produce higher pressure and firmer shifts with more holding power. Now you can buy a 700 Raptor Junior transmission with the #30 Wake Up Kit installed (numbers 1-3X-4-28), Alto Carbonite Power Band with thicker hardened anchors that holds in second and overdrive, and the #1 Street Raptor torque converter for the price shown below. This transmission by itself is better than most of the other high performance 700R4’s on the market today. This transmission is for any type high performance / heavy duty use up to 500 horsepower and 400 torque using pump gasoline.

Chevy 700R4 Transmission – Level Three “700 Raptor”. Our level three transmission comes with a high performance Superior intermediate billet servo that has 35% more holding power than a Corvette servo. It will give a firmer 1-2 and 2-3 shift. It also has a high performance Superior overdrive billet servo with 50% more holding power than the stock overdrive servo. This servo gives a firmer 3-4 shift. This 700R4 has 8 Red Eagle clutches and full thickness Kolene steels in the 3-4 clutch drum. Our 700R4 comes with the Mega Valve and an oversize low / reverse boost valve, these two valve produce higher pressure and firmer shifts. All of our high performance 700R4 transmissions come with a 13 vane high performance / high volume pump. We use an Alto Carbonite Power Band with thicker hardened anchors that holds in second and overdrive. Also included in the price is a heavy-duty balanced stall converter with furnace brazed fins, a Sonnax carbon fiber clutch and needle bearing for added strength. This torque converter can be ordered with stall speeds of 1800, 2000, 2300, 2600 or 2800 RPM (#2). Some of the other features are a 30 spline input shaft, “The Beast” reaction shell, special Transgo separator plate if needed, elevated pressure regulator spring, extra wide sun gear bushing, extra wide rear stator support bushing, performance 1-2 accumulator spring, high output pump slide spring, special intermediate servo release check valve, Corvette governor if needed and a 29 element heavy-duty Borg Warner forward input sprag. Also included in this package deal is a throttle valve cable, dipstick and tube, and an automatic converter lock-up switch. Compare all of these features with any other 700R4 on the market. Why pay this much or more without getting all of the good parts? Over-all this is the best 700R4 on the market at the best price. I have one in my one ton Suburban with 463 cubic inches and 455 foot pounds of torque. I pull a 5,500 pound trailer in overdrive all the time. The transmission has been in use for years now with no problems. The 700R4 has a 3.06 ratio in first gear, which is 20% lower than most transmissions. The 30% overdrive will give a 30 to 40% increase in gas mileage on the road over a 3 speed transmission. This transmission is for any type high performance / heavy duty use up to 600 horsepower / 450 torque using pump gasoline.

Our Level 4 700R4 “700 Mega Raptor”. This is the transmission that couldn’t be built until now, because the parts weren’t available. As the 700R4 transmission becomes more and more popular, stronger parts come on the market. This transmission has every heavy duty / high performance part on the market plus all of the tricks we’ve learned in our twenty years of building high performance / heavy duty 700R4 transmissions. This is the strongest 700R4 transmission that can be built bar-none. If it doesn’t have it, it can be added as an extra. Here are some of the parts that come as standard on the 700 Mega Raptor. You get everything that comes with the 700 Raptor plus the Raptor Drive Package, Torque Master Package and the five pinion planet gears. This transmission is good for any type of heavy duty / performance use up to 700 horsepower, 700 foot pounds of torque using pump gasoline, 4WD, towing, street rods, drag racing, big block, one tons and others. See ratings chart below. 700R4 Extreme Duty Raptor Drive Package. You get a hardened drum assembly plus a hardened reaction shell and bearing. Every time you think there’s nothing else that can be done to a 700R4, here it comes. These parts are made to withstand way over 600 foot pounds of torque. Made with new input drums and new hardened input shafts. Starting with a high grade of steel this shaft is hardened by electric induction. This shaft is 57% harder than a standard OE shaft. Comes with the Sonnax Input Drum Support Ring installed.

Chevy 700R4 Transmission – Level Five 1,000+ HP Rated ”700 Extreme Raptor”. Every man has dreamed of it, thought about it, and even vision himself doing it. The build all of all build all’s. The time in your life when the kids are gone, wife is set up in her house like she wants, and you have some extra cash. It’s time to build your dream car, and today we are designing a gear head’s dream transmission. The transmission we always dreamed about, the transmission with the best of the best. The transmission you know nobody has ever developed before. On this date 03-29-12 nobody in the world has the transmission parts available to build this but us. With the release of the new Smart Tech Input Drum we are proud to present this new development to you. “When designing this transmission we were given the Carte Blanche by Turbo Don our Owner and Founder, we were told we did not have any budget guidelines but it has to handle 800 hp reliably. We are living vicariously through somebody else’s checkbook. Is there a better job? – PATC Development Team. Available now the level 5 Extreme Raptor Transmission, the world’s fastest strongest 700R4 transmission – Stronger because it has the “Smart Tech Input Drum” – This drum is able to use 9 Red Eagle clutches and 8 full thickness Kolene steels with a special ZERO-FLEX bolt-on backing plate – This was never possible before – Faster because it has our PATC “Power Gear” planetary. This planet gear has the correct gear ratios so you don’t get the usual RPM and power drop-off between first and second gears. This gearing will lower your quarter mile time by 3/10 to 5/10 of a second. “Thirty years in the making, these were the last two parts needed to make the 700R4 truly an awesome transmissions”. This transmission is able to handle extreme horsepower, higher than any other 700R4 transmission ever built before. This transmission has broken all the rules and all the records. After 30 years of research, development, and destruction the COMPLETE solution has arrived for the 700R4 platform. We have 14 major design changes that have been performed on this transmission. We have always wanted a 700R4  that could handle insane power reliably. It has arrived Ladies and Gentlemen. Our 1st area we wanted to address is the gear ratios in this platform. From the factory we are faced with a 3.06 1st gear ratio and a 1.63 2nd. When the 700R4 was 1st designed the V8’s were packing a measly 180hp from the factory, so when combined with a 4,500 lb vehicle the 3.06 1st gear worked great. Fast forward to today when a 500hp daily driven street car is the norm and you soon realize that you blow through 1st gear rather quickly and just blow the tires off. Then you hit 2nd gear and you see this large RPM drop and high horsepower vehicles are at a lower part of the engine efficiency. This is exaggerated even more with the addition of larger camshafts with tighter lobe separation angles and you soon find yourself trying to shift later out of 1st so your drop isn’t as low coming into 2nd where you have very little port velocity. So we are faced with a 1st gear that is useless and a 2nd gear that initially lugs our engine. We were sick of this and said we will not let this be an issue in our dream transmission. We changed the gear ratio on this transmission from the factory 3.06 1st gear to a 2.84 1st gear. We took 2nd gear and changed it to 1.57 vs. a stock 1.63. We achieved this with our 6 pinion front planet. This is the 1st time we have ever offered this planet set in a transmission. We then moved to the rear planet replacing the pathetic 4 pinion factory style planet with our NEW AC Delco rear 5 pinion planets. These planets have 25% more load carrying ability. Keep in mind GM felt the need to turn to this planet in 2002 with the y-body and made it standard on all LQ9 equipped trucks. These vehicles only came with 345 hp and 385 ft lbs of torque with loads of torque management programmed in from the factory. You can imagine the added production cost involved in adding these. These planets are new, not the inexpensive aftermarket Taiwan planets sold elsewhere. The planets runs twice the cost of cheap aftermarket and standing them side by side it becomes very apparent the differences. The 1st being that the planets gears themselves do not move as freely as the Factory ones. The aftermarket planets also have a weaker thrust bearing with less roller bearings, this is immediately noticed when attaching the reaction shaft to the top of the planet and spin it. The inexpensive planets spin at a much slower rate and you notice a significant amount of drag, which equals parasitic loss. Bottom line we did the right thing here yet again. Ahhh, the infamous 3-4 clutch. This has been a headache on this platform for too many years. We have many arguments, debates, and even fights over this clutch pack. We have seen clutch solutions from mild to wild, while nobody really looked at the real issue, deflection in the drum. How many of us have air checked our input drum at 60 to 100 psi and seen the bending and flexing of the plate and snap ring? This deflection can and will lead to coning within the 3-4 clutch pack which always cause premature failure. This was most apparent within the industry when General Motors modified the clutch pack in 2006. When the LS2 platform was released in the Trailblazer SS GM added another clutch to the set-up to try to end all of there woes. While adding another clutch to the 4L70E did help improve the life, the problem didn’t go away. At this point in development GM already had the 6 speed 6L80E sitting in the y-body that year and further development ceased. This is where we picked up. We knew that our last obstacle was making the 3/4 clutch survive for more than half a race season. Fast forward to today and we are proud to present the last piece of the puzzle. With the new Smart Tech drum we were able to finally solve the issue with deflection with in the 3-4 clutch pack. This allowed us to not only get radical with our pressure apply rates (no coning) but it also allowed us to no longer worry about the end of the drum blowing out under extreme conditions. This gives us the ability to have tremendous clamping load within the drum. We were also able to achieve more clearance with the new design pushing our clutch count to an astounding 9 Red Eagle full thickness double sided clutches and 8 FULL THICKNESS Kolene coated heat treat steels. End result, is a drum that can withstand tremendous apply force, incredible clamping load, additional clutches and absolutely no deflection in the 3/4 clutch pack. If we had the option this drum would go in every single transmission we build here, but at $500.00 a pop, it is only an additional option on our level 2, 3 and 4 700R4 transmissions. Bottom line, this is the end all of all end alls for our 3-4 clutch pack woes. Every single component of this transmission has been over engineered. This transmission is ready for anything you could possibly throw at it. There’s NO OTHER transmission on earth built to this magnitude. Our level 5, 700 Extreme Raptor has left no stone unturned and no expense spared. Lets take a look at our build in detail. This Extreme Duty 700R4 Transmission has the Smart Tech Input Drum Kit that holds more Red Eagle clutches (9 full thickness) than any 700R4 input drum ever built. The drum comes with a 300 Maraging Billet Steel Input Shaft. We removed the rear planet replacing the pathetic 4 pinion factory style planet with a NEW AC Delco rear 5 pinion planet. These planets have 25% more load carrying ability. Next we replaced the front planet gear with our 6 pinion Power Gear that has a better 2.84 first gear ratio so you don’t get the usual RPM / power drop-off between first and second gears, this gearing will lower your quarter mile time by 3/10 to 5/10 of a second. This transmission comes with the Torque Master Kit, Smart Shell, 2 oversize servos, 2 oversize pressure valves, 2 oversize bushings, our Billet Steel Pump Rotor, Carbon Fiber 2-4 band, Borg Warner 29 element input sprag and many more upgrades / improvements. You get everything pictured above. Add Powder Coating, Air Brushed Case, Rollerized Reverse Input Drum, Extra Wide Band, Pinless Accumulator Pistons, Pan and Output Shaft upgrades if desired. We recommend our MR-2 or 2B billet torque converters for this transmission. Thirty years in the making, these were the last two parts needed to make the 700R4 / 4L60E truly an awesome transmissions (2.84 to 1 Planet Gear and the Smart Tech Input Housing). Let’s take a look at some of level 5 parts in detail. We have many reports of the Level 5 Extreme Raptor transmission holding over 1000 horsepower. See chart below.

700R4 TransmissionsLevel 1 – “Stock Plus” Mega Valve and Corvette ServoLevel 2 – “Heavy Duty” 700 Raptor JuniorLevel 3 – “Super Duty” 700 RaptorLevel 4 – “Extreme Duty” 700 Mega RaptorLevel 5 – “Extreme Duty” 700 Extreme Raptor
Torque ConverterStock#1#2 Carbon Fiber Clutch#MR-2 or #2B (extra)#MR-2 or #2B (extra)
Throttle Valve CableYesYesYesYesYes
Dip Stick and TubeYesYesYesYesYes
Free ShirtYesYesYesYesYes
Core ChargeIncludedIncludedIncludedIncludedIncluded
ServosCorvetteOversize 35% & 50%Oversize 35% & 50%Oversize 35% & 50%Oversize 35% & 50%
Pressure Valve.500″.500″.500″.500″.500″
BandStockAlto Carbon Fiber with Thicker Hardened AnchorsAlto Carbon Fiber with Thicker Hardened AnchorsAlto Carbon Fiber with Thicker Hardened AnchorsAlto Wide Carbon Fiber with Thicker Hardened Anchors + Bearing on the Band Drum
ClutchesAlto BrownAlto Brown3 – 4 Clutch, 8 Red Eagle clutches with full thickness Kolene steels3 – 4 Clutch, 8 Red Eagle clutches with full thickness Kolene steels3 – 4 Clutch, 9 Red Eagle clutches with full thickness Kolene steels
3 – 4 Clutch Upgrade____——————
Free Cooler or Deep Chrome PanChoice of OneChoice of OneChoice of OneChoice of OneChoice of One
Stall Speeds1600, 1800, 20001700, 2000, 25001200, 1400, 1600, 1800, 2000, 2300, 2600, 2800You PickYou Pick
Speedometer GearsYesYesYesYesYes
Raptor Drive Package, Recommended for over 450 Torque.NoSonnax Backing PlateSonnax Backing PlateYesSmart Tech Input Drum, holds 9 full thickness Red Eagle clutches
Input ShaftStockStock or HardenedStock or HardenedHardenedBillet
Torque Master KitNoNoNoYesYes
5 or 6 Pinion Planet GearsNoNoNoYes 2, 5 PinionYes 5 Pinion Rear, 6 Pinion Front Power Gear
Corvette GovernorNoNoIf NeededIf NeededIf Needed
Oversize Lo/Rev Boost ValveNoYesYesYesYes
13 Vane PumpYesYesYesYesBillet Pump Rotor
Elevated Pressure Regulator SpringNoNoYesYesYes
Beast Reaction ShellNoYesYesRaptor Drive ShellSonnax Smart Shell
#38 Pump Slide SpringNoNoYesYesYes
#41 Servo ValveNoNoYesYesYes
29 Element Forward SpragYesYesYesYesYes
Performance 1-2 Accumulator SpringNoNoYesYesYes
#19B Extra Wide Sun Gear BushingNoNoYesYesYes
#19CB Extra Wide Rear Stator Support BushingNoNoYesYesYes
4th Gear Lock-Up OnlyYesYesYesYesYes
CommentsBetter than stock with the Mega Valve and Corvette servo.Tow up to 4000 pounds in overdrive.Tow up to 6000 pounds in overdrive.All But Smart Tech Input Drum, Billet Input Shaft, 6 Pinion Power Gear, Billet Pump RotorBest of Everything
2WD, 4WD Price$$$$$
Quantity DiscountBuy two level 3, 4 or 5 transmissions and converters at the same time and receive $50.00 off on each.
Included If Needed:

Dust Cover, Carburetor Adapter or Stud, TV Cable, TV Cable Bracket, Dip Stick, Flexplate, Crossmember, Speedometer Gears and Housing, Transmission Mount, Lock-Up Kit and Pigtail.


The price doesn’t include C4 Corvette tail housings.


Transmission ratings are for non-supercharged systems using pump gasoline. Superchargers, Turbo Chargers, Nitrous, 4WD, Oversize Tires and Weight will lower these ratings. These ratings are for flywheel horse power.

TransmissionHorse Power RatingTorque Rating
Level 5 –  700 Extreme Raptor1000+800
700 Mega Raptor700700
700 Raptor600450 / 600 with Raptor Drive package
700 Raptor Junior500400 / 500 with Raptor Drive package
Stock +, 700R4350300

With the PATC / Sonnax 2.84 Power Gear there is a 300 RPM less drop when shifting from first gear to second gear, resulting in a 3/10 to 1/2 second better quarter mile time.

700R4 thin 1/8″ 3-4 backing plate flexing with a stock backing plate. This the main cause of 3-4 clutch burn up on a 700R4 transmission. We would only use this plate on a stock transmission with low horse power.

Syclone racing cropped

Ray Lichtenberg’s “Hated” Syclone

  • Level 3 Sonnax 4L60/E Build (PATC Level 5 700R4 / 4L60E)
  • 900 HP
  • 1,000 ft-lbs
  • AWD

Still going strong after 3 SEASONS on the road and track, Sonnax upgrades harnessed the Syclone’s huge horsepower and massive torque during the 2017 Optima Ultimate Street Car Challenge.