The results are firmer shifts and reduced slippage and shift overlap. Shift kits simply eliminate many of the restrictive oil flow problems in the transmission’s valve body. What do shift kits do? Why do they make the transmission shift harder? Summit Racing put together a chart with the dimensions of popular GM, Ford, and Chrysler automatic transmissions. If you’re trying to fit a different transmission into your chassis, or if you’ve got a custom project in the works, you’ll need to measure the tranny to make it fits.

What are the dimensions of my transmission? To figure things out on your own, you can view the diagrams by clicking the links below:

Manual transmissionsare little bit harder to distinguish, so the Summit Racing guys often turn to Hurst, which has an assortment of diagrams to help ID a manual tranny. You can check out this earlier OnAllCylinders post for transmission dimensionsand a slide show of different transmission pan shapes. There are two basic ways to identify your automatic transmission: transmission pan shape and overall transmission dimensions. For now, let’s answer the basics: How do I identify my transmission? In a later post, we’ll help you diagnose common transmission issues and sounds, so you can get your tranny working properly. To get you thinking about your transmission and its importance to your vehicle’s performance, we’ve compiled a list of the most common transmission questions, according to the Summit Racingtech department. (Yes, the Summit Racing guys were kind enough to supply the answers too.) Of course, all that is power basically useless without a good transmission to put it to the pavement. And we spend hours under the hood or around an engine stand in an attempt to wring every last bit of power from an engine. You’ll most likely see dozens of engine build stories in magazines before you see an article on a transmission. It doesn’t often get the same respect or attention as the engine-until it starts acting up. The transmissionis the little brother of the powertrain.

Summit transgo shift kits