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I have the Mazda M5OD Trans and a BW 1356-27 T-Case (Tag # E8TA-EA), and I'm getting a horrible vibration and squeeking sound when driving . I have new spider gears, rear axle bearings, brakes and drums, and am now turning to the t-case. There is plenty of fluid in the rear and t-case, and neither is leaking. Can anyone help?
Also, I found 2 replacement t-cases. Are the 1356 and 1345 interchangable?
I would check the clutch-pressure plate and throwout bearing as well as the driveshaft u-joints first. The 13-45 will work, if you change the shift linkage and bracket.