Little tough sometimes going into 1st gear (standard trans) . when i accelerate you can hear a sqeeking noise sounds like a brake pad but is not brakes the noise sounds like its coming from transmission. then when i get on the freeway at about 50mph + the truck shakes a bit feels rough and the acceleration is not as strong. Help me please!!!
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Wow I hate to say this but from what you have said here it sounds like the synchronizers and some of the bearings are going bad in the transmission. The synchronizers are what keeps it in gear once placed in that gear and when they go bad you can be going and let off of the gas and it will pop out of gear and sometimes when you just take off it will do the same. The knocking and grindind noise sounds like the nut on the main main shaft in the trans has loosened up some and this could also explain the synchronizer problem. As for the front axle i would get the parts needed to put it back together properly it is never a good idea to run it with them locked in all the time. Good luck. Hope this helps.
Maybe a stretched transfer case chain.
I wouldn't rule out some trans issues
Got the correct fluid in transfer or proper level
The clunk sounds like ,U-joints
Check all the mounts on everything,trans, transfer.etc
Check the idler and tensioner pullys for your serpentine belt. I suspect the whining noise heard earlier was due to the fact one was getting a bit stiff or rough turning. When you gave it that extra fuel, the sudden load may have finished it off. Sometimes they lock up, and sometimes they fall apart. Check those items first.
first thing you need to do rule out vacuum to shifting module make sure there is no leaks you usually can detect by a hissing sound or high pitch whistle check your shifting module on your transmission providing transmission screen and filter has been maintained as for the second part gm powersteering pumps have a tendency to whir if a new belt has been installed until it breaks in
It's hard to understand when you say it feels like a manual shift. Noise? Feel? I do know that the 87 auto trans does have a weak 1st to 2nd shift drum (as explained to me by my mechanic) that makes a grinding, elongated shift under heavy acceleration when it starts to wear. Under normal acceleration, 1st to 2nd shifts were normal (crisp, immediate). Since that day 8 years ago, I've avoided starting off to quickly, and so far have saved myself a tranny overhaul.