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Power steering gearbox 1964 el camino12/27/2023 ![]() It is also a good idea to verify your input shaft type. There is a number on the end cap that will let us know what stops you need. Some models of vehicles have different internal stops to limit steering travel. Most vehicles use a sector shaft with 3 Blind Splines, but some (usually Diesels) have 4 Blind Splines. Most of the time: 1500 2x4, 1500 4x 2x4 use the small bore, and 2500 4x4, 3500 2x4, 3500 4x4 use the big bore, but there are some exceptions. Casting number 84 is a "big bore" GMT800. Casting number 83 is a "small bore" GMT400. There is a casting number on the housing of the gearbox (either 83 or 84). This gearbox is found in GM trucks and SUV’s from 1987 on. Yes, the SAE thread pitch will thread into the metric threads! If you are installing into a pre-1980 vehicle that has inverted flare fittings, we can install a seat kit that will allow you to thread your existing hoses. Again, the older SAE gearboxes are very hard to find, so the majority of the gearboxes we sell are metric. Gearboxes before 1980 will have 5/8" and 11/16" SAE inverted flare fittings while gearboxes after 1980 will have 16mm and 18mm O-ring fittings. A threaded shaft (found in 2WD vehicles) and a notched shaft (found in 4WD vehicles). The one variable with the 708 gearbox is that it came with two different sector shafts. Notice how the mounting holes are on the top side of the gearbox. It is easy to identify because it mounts on the outside of the frame and the mounting tabs are on the opposite side of the gearbox. This gearbox was found in GM trucks and SUV’s up to 1986. When counting the splines, it is important to know that the 30 and 36 counts include any missing splines that are removed where a flat on the shaft is. You can simply change the rag joint to accommodate a smaller input shaft. Yes, the SAE thread pitch will thread into the metric threads!Īlong with the change of fitting style in 1980, the input shaft also changed from 13/16-36 (pre-1980) to 3/4-30 after 1980. Pre-1980 gearboxes will have 5/8 and 11/16" SAE inverted flare fittings while gearboxes after 1980 will have 16mm and 18mm O-ring fittings. If you must have a 4-hole pattern it can be special ordered. They are much more common and easier to find cores, so we typically sell the 3-hole version. The 3-hole is the same pattern, just missing one hole and will fit directly into any vehicle that had a 4-hole pattern. It came in both a 3-hole "L" and 4-hole "H" mounting pattern. If you measure the end cap, the 800 is roughly 3" and the 808 is just under 3.5". This is easy to measure from the outside of the gearbox. The 800 has a 70mm piston and the 808 has an 80mm piston. The difference between the Saginaw 800 and the Saginaw 808 is the size of the piston. This is the most common GM steering gearbox found in cars and small trucks from the 1960’s into the 2000’s. We can do gearbox rebuilds on many other gearbox styles, but for anything other than the Saginaw models listed here you must send your gearbox into us for rebuild. Saginaw Bronco Gearbox: 1966-1977 Ford Bronco.Saginaw Ford Gearbox: 1971-1973 Mustang/Cougar.Saginaw GMT Gearbox: 1987-2000s GM Trucks/SUV’s.Saginaw 800/808 Gearbox: 1960s-2000s GM Cars and small trucks.There are 5 different Saginaw boxes that Lee Power Steering sells and services. This is a guide to help you identify a Saginaw steering box and variations of each steering gearbox. ![]()
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