snapping noise from trans/rear

[SMP142]

i have put about 100 miles on my new clutch now and i seem to be getting a snapping noise sometimes. its done it ever since i put it in. i have the 6 puck clutch and 3200pp with alum flywheel and driveshaft. when i back up and then to go forward it sometimes has a snap noise to it. or when i take off turning a corner like at a stop sign. i am not too worried b/c my truck does it. but it has a locker in it. i wasnt sure if its the lsd or just the pressure plate fingers being soo stiff. anyone had this prob?

 

[SPD TRP]

Is it like a clicking when accelerating from a stop?

If so it may be a u-joint.

Wayne

 

[johnathan1]

mine does this too, it seems to happen only after driving for a while...and when accelerating from a stop while turning...i can hear like a "rub rub rub" until the car is straight again, i can even sometimes feel the backend jerk a little bit.

 

[SPD TRP]

mine does this too, it seems to happen only after driving for a while...and when accelerating from a stop while turning...i can hear like a "rub rub rub" until the car is straight again, i can even sometimes feel the backend jerk a little bit.

The rub/rub when turning sounds like it could be a bearing.

 

[johnathan1]

bearing in diff, or wheel bearing? If you mean wheel bearing, I kinda already suspected that, but at this point it's just annoying...

 

[boost fiend]

i also get noises like that. i think i have found that the bearings in the diff are about shot. if you jerk the driveshaft around, you can watch it move there.

 

[SPD TRP]

The rub/rub when turning sounds like it could be a bearing.

If you get the rub/rub when turning, then it kinda goes away, I would have to say it is a bearing noise.
The reason is because when you are turning you are are "loading"; for lack of a better term; with side loading, if that make any sense.

I don't think the noise you may hear is in your rearend unless your carrier bearings are going out--how many miles?

At any rate, there are probably tons of rearends in the salvage yards, hell, might be able to find a 4.30 LSD out of a N/A TEMS for the same price as a turbo rearend.

Wayne

 

[SMP142]

the noise mine has is like that of a locker. i dunno if any of you ever been around them when they lock in or out. but it has like a snap sound, sounds really bad but its just how its made. my car only done it ever now and then. thats what i cant figure out what the deal is.

 

[boost fiend]

maybe change the fluid and put lsd additive in there.

 

[SMP142]

thats the thing thats all been done. i just noticed it since i did my all my work. could be clicking on the fingers on the pp, but i dunno.

 

[xarewhyayen]

maybe change the fluid and put lsd additive in there.

Boost fiend is right about the lsd additive... johnathon, if you get noise when turning, its probably your clutches chattering... LSD additive must be added for its friction modifiers so the clutches in there have some slip to them so they work correctly. I suggest a drain and refill with some good 75/90 gear oil and correct lsd additive.

 

[SMP142]

i know its been awhile since i have talked on this subject. i think the last post on it was aroud may and here we are in august now, but... i am still getting some noises from my trany area. i know its not my rear end b/c the sound not coming from there. i did put lsd additive in it though, but nothing changed. for some reason i am comvinced it has something to do with the pp. almost sounds like the fingers clicking. its possible that it did it before i installed the alum driveshaft. kinda sounds like it enhances the noise of it. it still does it when i either take off or shift. not all the time only when it wants too seems like. it shifts and drives fine, its just the noise that bothers me. i just havent had the time to take off the inspection plates to check it out. any suggestions? i am lost on this one?

 

[MDCmotorsports]

Check to see that the bolts on the back of the driveshaft going into the front of the rear end are tight.

Also check the u joints to make sure they opperate freely in all ranges of motion.

 

[SMP142]

the u-joints are perfectly fine. the driveshaft only has couple thousand miles on it. i am not sure on what bolts you are talking about? my driveshaft bolts that connect to my yoke? b/c those are all good too. they ewre brand new when i did the driveshft and i checked the torque not long ago. is it possible it has anythign to do with the pp?

 

[MDCmotorsports]

The couple thousands of miles could have damaged the u joints - trust me.

The bolts are the ones that connect the driveshaft to the LSD. If not installed propperly, they will loosen in no time at all.

 

[SMP142]

my bolts are tight i checked them about a week ago and nothing changed. i doubt its the u-joints since its done it since i installed the new driveshaft. i did the clutch, pp, flywheel and ds all at the same time. i checked the driveshaft when i checked my bolts. there isnt any play in it that i can notice with just the rear end off the ground. i guess i am gonna check it out today since i am off. i am gonna take off my inspections plates on my tranny and check out the pp too. if you have any other guesses let me know. i will let you know what all i got figured out today...

 

[MDCmotorsports]

Jack the rear end up, and turn the wheels and listen.

See if the noise is comming from the cv joints. Of course don't rely just on the jack - use some jack stands.

 

[SMP142]

i jacked up my car and checked out the pp and everything. all the stuff in there looks real good. i tried moving my driveshaft back and forth up in the front by the tail of the tranny. it barely moves at all. i think that it just the tranny moving though. i never noticed it till now but this tranny has a floating mount on the rear of it right? i can be right under the ds or rear of the tranny and i can push up and move the whole rear end of it up. that seems kinda weird to me since i havent ever been around any other setups like that before. like it would let too much movement go on. i will go back out and rotate the rear wheels again to see what happens. if i hear anything that is.

 

[SMP142]

i found nothing wrong with the rear end or driveshaft. the only thing i noticed was the rear tranny mount. is there suppose to be a rubber gromet type thing where it has space to move a little? i know that makes no sense at all. i will try and find a pic in the manual or take a picture tom and post it. the reason i say this is that with no gromet in there it would seem to be metal hitting on metal. i will get a picture asap.

 

[SMP142]

i found a kinda crappy picture. but its that center part which can move up and down. is there suppose to be a rubber bushing in there? mine has nothing and i think when i back up its the torque pushing the tranny up and metal hitting metal which is making my noise. anyone know for sure?