dunno man, btw you've probably got a 700r4, in which case a tranny problem is very likely :(
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dunno man, btw you've probably got a 700r4, in which case a tranny problem is very likely :(
how about motor mount. The fan could be hitting the fan shroud.
im no scientologist either but since it doesnt seem to be doing it in park or nuetral i would think bad u joint, or something in the rear axle like a limited slip or something like that is messed up, and especially the limited slip if you power brake it alot.Quote:
Originally Posted by aggieblazer07
I'm thinking ujoint too. Put it in gear and power brake the vehicle in drive and reverse to see if it makes a poping or clicking noise.
if it was a u-joint it wouldn't speed up when it downshifts
if it's rpm variable then its tranny forward, if its speed variable then its tranny rearward...or forward in the case of 4wd. so, if it's rpm variable then a bad u-joint isnt the problem. since an automatic transmission is a magical box to me, and im not sure what's inside, i dunno if it could be in there or not. never heard of a t converter tapping, but then again ive never had one apart and dont know whats inside. i know how they work and there should be no touching parts to be clicking.
check for exhaust leaks. it could be a small exhaust leak or blown head gasket that only shows up when the engine is loaded. exhaust leaks sound like tapping lifters all the time. when the engine is loaded, the cylinder pressure is higher because its actually having to push against something rather than just accelerating the piston. a good way to check for this is with a peice of vacuum hose. put one end in your ear and listen for small leaks around the heads and manifolds. like listening for vacuum leaks. of course not when your driving, just sitting in the driveway. unless you can find a buddy to drive for you and you can sit on the fender with the hood up and cruise around town.
How did you adjust lifters? You swap in solid cam and lifters?
Or maybe it just likes to make noises. All 3 of my jeep motors have allways had ticks, and the latest one still runs.
I backed off the nut on the rocker until it started clicking and then tightened it until it stopped clicking. Then I turned them each a quarter of a turn. I did that trying to stop the occasional clicking, but after driving for a week the clicking happens everytime I drive it.
that could possibly be your problem. ive never adjusted rockers with the engine running. im not sure how the lifters being pumped up affects the adjustment. my guess is that they are fully pumped and if you adjust them this way then it leaves no room for error. kinda like running a solid lifter cam. could be the explaination as to why it comes back after a week or so. the way ive always done it is with the engine off, tighten the rocker nut until there is no up-down play in the pushrod, then tighten another 3/4 turn to center the lifter plunger in its stroke. you have to do this when the valve is completely seated. ive always done it by rotating the engine back and forth until i could tell there was no lift. but, if you wanna do it right, find TDC for cylinder #1 and do both valves for it and the intake valves on #'s 2,5,7 and exhaust on 3,4,8. then rotate 360 degrees and do 3,4,6,8 intakes and 2,5,6,7 exhaust valves.
edited to note: you rotate the engine 360 degrees, this does not involve doing the hokey pokey or shaking it all about
agjohn's method is what they use at Vilas when building SBCs.
hows about putting the rear end on jackstands, put it in gear to get the wheels spinning and see if you can hear something different then?
mr saftey says yikes this sounds like a bad idea :flipoff2: . i would try what ag john says and yes exhaust leaks can sound like a lifter tapping my damn bronco has two exhaust leaks and sounds like crud.Quote:
Originally Posted by uglyota
Quote:
Originally Posted by uglyota
have you ever seen ferris bueller's day off when they were trying to rewind the odometer on the old ferrari?
I didn't say to throw every stitch of common sense you have out the window, stick your diff on a pile of firewood and throw 'er in reverse. :flipoff2:
ask kopecki how he balances a driveshaft
I'm pretty sure it isn't the lifters, I adjusted them and nothing has changed. It might be something loose on one of the pistons. It doesn't sounds pretty at all. I have made some more observations, it only does it when the rpms are steady or speeding up, not when it is slowing down. I might be putting a new engine in this weekend. 267,000 miles isn't too bad on one engine.