RAU03MACH
Legend
always used Ford Racing gears never had any bad luck with them
im getting ready to do my 98 gt with a set of 410
im getting ready to do my 98 gt with a set of 410
I know that the heavy cover is to reinforce the case while in motion, but I haven't heard of a case warping. I mean axles bent, sure, and case distorting under load, but it would stay distorted when unloaded.....
Shop wants to claim the bellhousing is warped in the pinion area.
My bad, definitely meant the diff housing. Its been a rough couple of weeks dealing with this.I would like to point something out... not just to be "that guy".... but....
A "bellhousing" doesn't have a dang thing to do with a differential.
If "diff housing" was the intended statement, I understand.
I'd be amazed if I managed to warp the housing with this car. The worst its seen with me is a spirited driving on backroads and the occasional skid in the rain. I don't race the car at all. The whole reason it blew out the first time was because of me botching a pinion oil seal job. Managed to drive it about 600 miles before it started screaming and I limped it to a shop. Then it managed another 2000 miles in one go on that rebuild, whining the whole time.All metals have a fatigue limit. Even if you never exceed a designed limit, repetitive instances where you come CLOSE to it can still result in fatigue failures. Yes. The differential can deform (bend) out of spec if it is damaged in some way. It is possible you could not even see it or be apparent to the naked eye. Like I said previously, unless you stripped the entire housing and put an alignment bar in the housing, you may not even being to see the failures.
That pinion preload sounds a little tight, and the backlash sounds a little loose. Especially on a new set of gears. I always try to set preload around 20inlbs and backlash as close to .008” as possible, if not a little tighter. As things wear, the backlash will loosen up. If it’s loose to start with, it’ll be out of spec in no time at all. Loose gears make noise. And with a really tight pinion preload, it will kill pinion bearings.Update on the rear: Shop redid the work under warranty, with new gears (3.55), bearings & races, shims, and crush sleeve. I noticed the accel and decel whine immediately upon leaving the shop. Biggest difference was that both noises became apparent at lower speeds than before, and the decel whine is even audible below 20mph. Driveshaft still shakes along its axis of rotation when slipping the clutch in first.
Shop wants to claim the bellhousing is warped in the pinion area. Claimed the preload was set to 25inlbs with 0.011" of backlash. I'm just about ready to say to hell with it and just drive on it as long as it isn't making glitter.