However, they are both automatic transmissions. Then came in production in different years 1964 for TH4 for 700r4. TH400 and 700r4- both are all products of General Motors. TH400 and 700r4 can ensure a 168-tooth flexplate. Although 700r4 has 16 bolts while TH400 has 13 bolts, with different pan designs, both transmissions use a similar flexplate. Compatibility and ease to swapĪlthough TH400 and 700r4 do not come with a similar pan bolt pattern, they share similar alignments in their internal components. 700r4 has a thicker case because it is exclusively for 4 x 4 trucks, but Th400 is for heavy drags. The aluminum component of TH400 and 700r4 is fused with a bell housing pattern. Although TH400 is made from pure aluminum, 700r4 is made from cast aluminum.
Construction Materialħ00r4 and Th400- both are products of aluminum material. This shifts control to the output shaft speed, and throttle valve. This is different from 700r4 which relies on shift modulation. Or, will the differences make them incompatible?īoth transmissions have similar size and construction builds, but the Th400 works with a vacuum modulation. Understanding how these works will give ample knowledge on if you can swap a 700R4 with a Turbo 400. Mechanical OperationĮvery transmission system has a construction specification that matches its application. From Chevys, Suburban, Camaro, Corvette, Astro Van, or generally any cargo or custom van from the ’80s. You can find 700r4 in most rear-wheel-drive cars. TH400 was the household name for most heavy-duty cars. They were a perfect choice for service, strength, and buildable performance in Jeeps and Jeep sports. TH400 was mostly found in Jeep, Buick, 3sp auto Chevy and GMC trucks, Olds and Cadillac cars. The overdrive has a great advantage on that.Ĭhoose Th400, if you need a transmission for your trail rig or drives with the need for intense strength and pressure. If you need a high-performance transmission for racing, Th400 is a better option.Ĭhoose 700r4, if you need a transmission for street driving or you ride a dual-purpose car. The Overdrive in 700r4 also improves the durability of your engine and prevents it from wearing out faster. You can always think of them when you need a transmission for highway driving. However, especially with an overdrive, 700r4 is not the best choice for a drag race. The primary aim of introducing the 700r4 was to improve a car’s performance and fuel economy. You wouldn’t want to see your 700r4 breaking under intense pressure. It boils down to why you need a transmission.Īlthough you can build and modify your transmission to improve power, if you need something cool that can handle high-performance power, you should go for a Th400. The 700r4 and Th400- both can handle up to 650 HP. The issue of horsepower in the comparison between Th400 vs 700r4 has caused a lot of controversies. It gives cars with 700r4 the benefits of high speed at low engine power, less vibration and noise, and reduction of frictional effect that can cause engine wear. This gives 700r4 a higher speed ratio than Th400. The overdrive gives a better alternative to direct drive, stepping up the gear ratio of the car. The overdrive feature is fitted to the fourth gear of the 700r4 this offers a 30% increase. This is a big difference which Th400 lacks, compared to 700r4. Hence, th400 has an irregular fluid pan shape, but with a nine-angle, 13 bolt pan design.
700R4 has a four-bolt rear output, a tailhousing/adapter pattern with 16 bolts. There are visible distinctions in the bolt patterns. On the other hand, 700r4 has a square oil pan, this is compared to Th400 which has a texas shaped oil pan. Th400 has a 32 spline count with a larger diameter material. The 700r4 transmission started with a 27 spline input shaft, with upgrades made to 30 spline input.
#700R4 TRANSMISSION WEIGHT UPGRADE#
The 700r4 runs in different versions, with modifications made on each upgrade to make it better. And 700r4 vs Th400 transmission comparison will surely lead you to a final purchasing decision. Now, let’s compare these 2 transmissions coming from the two renowned brands based on their features and performance. difference between 700r4 and th400 (6 key Differences)ħ00r4 vs Th400 (Side by Side Compression Table)ĭifference between 700r4 and th400 (6 key Differences).700r4 vs Th400 (Side by Side Compression Table).
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