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If you find out that the transmission fluid looks dark red, brown, or even black, it’s time to replace it and flush your transmission. If the fluid level is low, try to fill it up to see if it solves the problem. Let the transmission fluid become hot and let your car idle at position park while checking the dipstick. So the first thing I would recommend is to check the transmission fluid level. However, the first thing you should always do when your transmission is slipping is to replace the transmission fluid and flush it. When your 700r4 transmission is slipping or won’t lock, it’s most likely a problem with the converter inside the transmission. Here I will give some common symptoms of the 700r4 transmission and add a short line underneath it to explain where you should start looking. I work as a diagnostic technician, and I’m solving problems with cars all day long. We have to remember that these transmissions are old and old things do fail sometimes. 700r4 Troubleshooting Guide 400RĮven if the 700r4 transmission is pretty durable and reliable, they do sometimes fail. If you still have questions about it, you are welcome to comment in the comment section at the bottom of your article and ask your questions. This is everything you should need to identify your transmission correctly. The last numbers and letters indicate the manufacturer date, rebuild date, manufacturing place, and serial number.
Harley Transmission Serial Numbers tv#
The last way to identify if it’s a 4L60 or a 700r4 is to look at the rear of the transmission for the Aux TV Cable or wirings, as discussed before. If you find 3 letters, the transmission is made between 1986-1993. If you find 2 letters, the transmission is made between 1982-1985. These numbers tell us the application, engine size, wiring type, and solenoids. The next 2 or 3 letters identify the model of the transmission. However, there are some ways to determine if you have a 200-4r, 700r4, TH350, or a 4L60 transmission. Most of the GM automatic transmission looks almost identical and is difficult to identify for an untrained eye. You would find these in the 1980’s trucks, and this transmission was very coveted because of the strength of the 4×4 offroad-community. The K-case 700r4 transmission had a thicker transfer case and was stronger because it was made for the heavier 4×4 trucks. The name “K-case” came because the transmission case was stamped with a “K”. RELATED: 4L60E vs 4L80E Differences: Swap & Information K-Case DifferencesĪ lot of you reported that you wondered what the differences are between a k-case and the typical case for the 700r4 transmission. The transmission is pretty reliable and can handle torque up to around 350nm~ remember that there are only reported numbers, and it can differ a bit. The transmission case had 16 bolts and a transfer case of aluminum. The recommended transmission fluid is Dextron VI, with a capacity of 11 Quarts. It had a case length of 23.5″~ and a weight of 170 lbs~ without fluid inside it. The transmission was made between 1982-1992. In summary, the 700r4 transmission was a 4-geared hydraulic automatic transmission with the 4th gear, an overdrive gear (30% increase). The transmission then became electronically controlled instead of the TV cable, with some other changes that I will go through further down in the article. In 1991~ the 700r4 transmission was replaced by the popular transmission 4L60. The 700r4 transmission was not electronically controlled yet it was hydraulic pressure controlled with a TV cable, which acted as a throttle position sensor to control the gear shifting. It is also effortless to find replacement parts for this transmission. To mention all cars, this transmission was fitted in the list would be very long.Ī lot of people like the 700r4 because of its excellent durability. You usually find the 700r4 transmission in GM cars like the Chevy Blazer, Suburban, Camaro, Corvette, Impala, and even in Oldsmobile Cars with a lot more.
Harley Transmission Serial Numbers upgrade#
The 700r4 was a big upgrade with an additional gear (Overdrive), the 1st and 2nd gear became longer, and the transmission case itself became a bit longer. The TH350 was a 3 geared transmission without the last overdrive gear. The 700r4 and the 200-R4 transmission replaced the TH350 transmission in that year.
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The 700r4 Transmission came in the year 1982. So what is exactly a 700r4 transmission? Well.