Both fuel injected … This eliminates potentially excessive wear on the thrust bearing. I broke in the cam on a rebuilt 351 Windsor and am experiencing the worst case of distributor gear failure that I have ever encountered. For a Ford with the thrust in the center, you will need three bearings – the thrust and both end main bearings. There’s a simple technique for installing and measuring thrust bearings. For testing we start by installing the front and rear bearings. Step 7: Install Direct Clutch Hub. I had this trans installed in the car and within a few days of daily driving The crank walk was discovered. The truck acts and preforms completely different now and all of my other problems such as idle, throttle response and driveability are solved. 347 multiple thrust bearing failures. So we called Federal Mogul tech line for help. Nothing really unexpected since the stock AOD barely handles a stock 302. i had an aod transmission built for the car to handle a little bit more hp. Please login or register. Its from a 87 Thunderbird. After running a turbo on a stock block 302 for over 10 years making roughly 500 hp, I figured it was on borrowed time and wanted something that wasn't a timebomb if I wanted to step up the power. I went to Napa today to buy new rod bearings and we were trying to figure out what size they were. Balancing Most 331 and 347 kits on the market are recommended for 28oz (early Ford) balance factor. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. We'll discuss the gaps later in the article series. Rings and Bearings We will round out the bottom end with Clevite rod, cam, and main bearings. The thin-wall block engine uses high-flow aluminum cylinder heads. Thread starter Mona91; Start date Dec 21, 2015; Forums. So im replacing the bearings in the bottom end of the 302 i have. All that is needed now are clutch discs between the clutch plates. Welcome, Guest. ProFlange® is a line of bearing sets supplied with oversized flanges, allowing the thrust surface to be ground to 0.010″, 0.020″, or 0.030″ undersize. what caused thrust bearing failure . November 28, 2020, 02:18:32 am ... it looks like lentech sent out a ford flexplate (i saw a ford stamp mark in it earlier) and looks to be a stock converter rebuilt to a 2600 stall. To control blow by and insure good compression, we went with Total Seal performance file-fit rings. The thrust bearing issues are solved along with the misalignment and spacing issue. Extra Insurance Against Engine Bearing Failures As crankshaft thrust surfaces and main bearing flanges begin to wear, the crankshaft can move longitudinally or “walk,” causing The direct clutch hub goes up against the number-7 thrust bearing. The Ford 302 was a Windsor small-block, 90-degree, V8 engine. They told us that back in the 80's, Ford had bearing problems in the 302's. 302 (347) Ford Thrust Bearing Issues. The motor in question is a rebuilt 1978 block with stock crank & rods with ARP fasteners installed, hypereutectic pistons, Clevite 77 bearings and Speed Pro/Federal Mogul cam & timing set. It was developed in 1968 from the Ford 289 by shortening its connecting rods for a 3.0-inch stroke. Maximum Thrust. This was something of a goal of mine for a long time and was finally in a position to be able to do it. For years both transmission and engine rebuilders have struggled at times to determine the cause of crankshaft thrust bearing failures. 1st thrust bearing failure: There are at least 25 mechanical and electrical errors swappers often make retrofitting mid-1980s to mid-1990s Ford 302/5.0L EFI V8s into old Ford muscle-cars. In most instances, all of the facts concerning the situation are not revealed at the onset of the failure. This is the direct clutch, steels, and thrust/needle bearings. 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