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If you are adding overdrive to a classic GM car or truck, you end up choosing between these two. The 700R4 came out in 1982 for trucks, Camaros, Corvettes and full-size cars, and evolved into the 4L60 and electronic 4L60E. The 200-4R arrived in 1981 as the overdrive version of the lighter metric TH200 and went into B-body and G-body cars: Monte Carlo SS, Grand National, Cutlass 442, Caprice and a long list of Buick, Olds, Pontiac and Cadillac models, through about 1990.
Both will cut highway rpm, both need a correctly adjusted TV cable to live, and both need lockup wiring to get the most out of the converter. But they are geared differently, sized differently, and the parts situation is not close.
Side by Side
| Item | 700R4 | 200-4R |
|---|---|---|
| Years | 1982 to early 1990s (then 4L60) | 1981 to about 1990 |
| 1st gear | 3.06 | 2.74 |
| 2nd gear | 1.63 | 1.57 |
| 3rd gear | 1.00 | 1.00 |
| 4th (overdrive) | 0.70 | 0.67 |
| Reverse | 2.29 | 2.07 |
| Bellhousing | Chevy pattern only | Most cases cast for both Chevy and BOP |
| Length | Roughly 3 inches longer than a TH350 | Close to TH350 length |
| Weight and case | Heavier, wider case | Lighter, narrower metric-based case |
| Shift control | Hydraulic, TV cable | Hydraulic, TV cable |
| Parts supply | Excellent, shares much with 4L60 and 4L60E | Thinner and getting harder to find |
Gearing: Which One Fits Your Rear Gear
The 700R4's 3.06 first gear is the big selling point. Put it behind a 3.08 or 3.23 rear gear and the car launches like it has a much steeper axle, then cruises in a 0.70 overdrive. That is why it is the go-to for trucks on bigger tires and muscle cars that kept a highway rear gear.
The trade-off is the big 1-2 split. Going from 3.06 to 1.63 drops rpm a lot on the shift, which some engines with a narrow powerband do not love. The 200-4R's 2.74 first and 1.57 second give tighter steps and a smoother feel, and its 0.67 overdrive is slightly taller. Behind a steep rear gear, say 3.73 or 4.10, the 200-4R's milder first gear actually makes a street car more drivable, and the taller overdrive brings cruise rpm down further.
Quick rule of thumb from the shop floor: highway rear gear, want launch, go 700R4. Steep rear gear, want cruise rpm and smoothness, the 200-4R makes a strong case.
Fitment and Swap Work
700R4
The 700R4 is longer than a TH350 and its crossmember mount sits further back, so most TH350-to-700R4 swaps need the crossmember moved or replaced and a shorter driveshaft. The case is wider at the front, and some tighter tunnels need a little persuasion. Chevy bellhousing pattern only, so BOP engines need an adapter. Our TH350 to 700R4 swap parts list covers everything that has to change.
200-4R
The 200-4R is close to TH350 length, so swaps into cars that had a TH350 or TH200 often keep the driveshaft or need only a small change, and the mount position is close. The narrower case fits G-body and other tight tunnels easily. Most 200-4R cases carry both the Chevy and the Buick-Olds-Pontiac bolt patterns, which makes it the popular pick behind BOP engines. Confirm the case you have before you buy one for a BOP swap, since not every case is cast the same.
Both
- TV cable. Both units set line pressure off the TV cable. A misadjusted or missing cable will burn either one up in a few hundred miles. Read our 700R4 TV cable adjustment guide; the principle applies to the 200-4R as well. Carbureted swaps usually need a TV cable bracket for the carb.
- Lockup converter wiring. Both need 12 volts to the TCC circuit plus a way to release lockup on braking and at low speed. A lockup kit with pressure switch handles it in cars without a factory computer.
- Speedometer. Both use a mechanical speedometer drive. Expect to swap the driven gear for the correct reading with your tire size and rear gear.
Strength
Neither one is a TH400. Stock for stock, the common weak points are:
- 700R4: the 3-4 clutch pack, the sun shell, and the input drum. Early 1982 to 1986 units are the weakest; later units got updated parts. A good rebuild with an upgraded 3-4 clutch pack and a hardened sun shell handles a strong street small block.
- 200-4R: a stock unit is on the light side for big torque. That said, factory Grand National and GNX units and well-built aftermarket 200-4Rs are proven in turbo Buicks and drag cars. A properly built 200-4R is not the weak link people assume; a tired stock one is.
For a heavy truck, towing, or big power, neither is ideal. Look at a 4L80E or TH400 instead; our 4L60E vs 4L80E guide covers that jump.
Parts and Rebuild Cost
This is where the 700R4 pulls ahead for most people. Because so much of it carries into the 4L60 and 4L60E, rebuild kits, drums, sun shells, pumps and valve bodies are everywhere and priced competitively. A 700R4 master rebuild kit is an easy buy, and hard parts show up at any transmission supplier.
The 200-4R has a devoted following, but hard parts are thinner on the ground every year. Soft parts kits are still easy; a replacement drum, pump or planetary can take real hunting. Budget more time and money if you are rebuilding a worn 200-4R core. Our 200-4R rebuild cost guide has the numbers.
Which One We Would Pick
- C10, square body, or any Chevy truck: 700R4. Better launch, cheaper parts, easy to find.
- Chevelle, Camaro, Nova with a highway rear gear: 700R4, and plan on the crossmember and driveshaft work.
- G-body or B-body with a BOP engine: 200-4R. It bolts up, fits the tunnel, and often belongs there from the factory.
- Street car with a steep rear gear that you want quiet on the highway: 200-4R, built properly.
- Want electronic control and a modern calibration: skip both and look at a 4L60E with a standalone controller.
Shop the Part
Rebuild kits, hard parts, valve bodies and lockup kits for the 700R4, plus 200-4R parts, at our sister store, CoreTransmissionParts.com.
Shop 700R4 Parts →FAQ
Is the 200-4R the same size as the 700R4?
No. The 200-4R is close to TH350 length and uses a narrower, lighter case. The 700R4 is roughly three inches longer than a TH350 and wider at the front, so it usually needs crossmember and driveshaft changes in a TH350 car.
Which is stronger, the 700R4 or the 200-4R?
Stock for stock, the 700R4 is generally considered the stouter unit, especially 1987 and later versions. A properly built 200-4R handles a lot of power though, as turbo Buick owners have shown for decades.
Will a 200-4R bolt to a Chevy engine?
Most 200-4R cases are cast with both the Chevy and the Buick-Olds-Pontiac bellhousing patterns, so they bolt to either. Confirm the case before buying, since not every one is the same. The 700R4 is Chevy pattern only.
Do both the 700R4 and 200-4R need a TV cable?
Yes. Both use the throttle valve cable to set line pressure and shift timing. Running either without a correctly adjusted TV cable causes low pressure, slipping and rapid clutch failure.