1946 Ford truck with a camero rear end..the rear end has 4:11 gears in it and it shakes the truck bad when I take off out of 1st and reverse. .anybody know why this is..i can't figure it out
1.) If it has the original flathead, check the pre-load rods. Under the floor, alongside the transmission: they are 1/2" diameter rods, attached from the side ears on the 59A bellhousing, run back to the frontal legs of the 'X' member. 2.) If the driveline is too long, it may be thrusting the hard bottom of the slip joint into the tailshaft. 3.) If none of these, put the truck in low gear, (engine off, parking brake released) and rock the truck fore and aft. If rear axle is loose (anywhere it is 'secured', 'U' bolts, spring ends, wishbones, 4 bars, etc.) that would result in a 'shaking' from dead starts. Reason for the wide #3 was that you didn't mention engine, trans, or how rear was mounted... Did I hit it?
I would check the pinion angle and orientation of the u-joints. There is more torque getting the truck rolling and something may be binding. I had a driveshaft 45 degrees off on the u-joints that did this. Finally broke the transmission. Sent from my iPhone using Tapatalk
It's original motor and 3 speed tranny..with a camero rearend..i was told that the gears are to high (4:11)..i will check all the things you guys mentioned later this week when I get up in my lift..thank you
Ford quit with the Anti Chatter rods when they went to open drive in the PU's in '42. Could this be as simple as a clutch slipping? PS Gear ratio is fine, the truck probably came with those gears originally, or lower (higher numerically).
Well, if you can't tell, it's hard to figure over the internet (IMO)...I'm in Oakdale if you'd like to make a run with it down here for another set of eyes, but hopefully there are HAMB folk a tad closer to you as well...just trying to save you "shop rate"...if it is a clutch issue, shouldn't take but a few hours to change, you bring parts and beer
Rough flywheel or warped disc, it will chatter like that on take off. Probably wear in or might just shake on occasion after awhile. Worn/weak pressure plate will do it too Sounds worst when the whole bed shakes
It sounds like terminal clutch chatter. Did it do it with the old rear? A steeper ratio could make the problem worse. How is the pilot bushing, badly worn it could be the cause.
Biggest part of the labor on a clutch job is dropping the trans and bellhousing and putting them back in, so the labor is about the same whether it's done right or done halfway. Plus, if you do it right the first time, you don't have to tear it down again any time soon. I agree that it is a clutch and/or flywheel issue. Make sure you don't have a rear seal leakinig and getting oil on the clutch. Take your flywheel to a good machine shop and get it resurfaced and checked for cracks. Replace all clutch components including the pilot bushing and throwout bearing. Also, check your driveshaft to make sure the U-joints are not out of phase, which would cause binding and vibration, but I think you'd have unbearable vibration all the time that would be worse at higher speeds if it were a driveshaft issue. You might have something else in addition to clutch/flywheel issues, but you definitely have clutch/flywheel issues.
Clutch Chatter , is my bet . I have never had any luck with anything but OEM clutch parts and no chatter in a Ford . Aftermarket has chattered , did nothing but replace with OEM stuff and smooth as silk