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View Full Version : crazy weird transmission noises (s13 sr20det tranny no grinds) help me diagnose!

sepulchral
10-06-2006, 10:06 PM
Got a s13 redtop w/ trans, came with a rare earth magnet plug, and short shifter,

tranny shifts smooth, however makes a horrible rattling/crackling sound like somethings bouncin around in the gears at higher rpms,

the car also makes whir whir whiring at idle, when i press the clutch in it goes away, however when i rev it up to 7000rpms with the clutch in, the noise is loud and crackly

like i said, no trouble shifting, just have noises all the time, decellerating, accelerating, etc.. the TOB was in good cond and the pilot bushing was replaced, i highly doubt it to be the TOB because of my description above.

what could it be?
sepulchral
10-07-2006, 11:40 AM
any1? ?
pr240sx
10-07-2006, 12:47 PM
internal bearing failure
I have the same but with no rattling/cracking sound. Just a whine.
If you repair it now, will just cost you some bearings, if you wait until later, you will need a tranny or more expensive rebuild.
Nowadays there tons of SR and KA trannys around, get one, swap bellhousings and you are done.
UNITEDMASTER
10-07-2006, 07:18 PM
Hello check the fluid levle,otherwise ^^^^^,what he said
pr240sx
10-08-2006, 12:05 AM
When the crackling sounds is heard, it usually mean that the bearings are already toasted.
Anyway, check and even better change the oil to a heavier GL4 (not GL5 or GL6) weight.
byhi
10-08-2006, 12:33 AM
also a common thing would be (i know this sounds like a long shot) but the pilot bearing in the crankshaft end has caused 2 peoples that i know personally's SR's to make horrendous sounds, 1 was just worn out and bit up, while the other kid had gotten an auto motor (having the auto pilot bearing) paired with a manual trans (paired from japan)

the pilot bearign is a 1 dollar part, its basically a chunk of tube... so its not expensive, check with a local nissan dealer if that is the case
street_white180sx
10-08-2006, 01:31 AM
sounds like the input shaft bearing.
sepulchral
10-08-2006, 05:04 PM
is the input shaft bearing easily replacable?
240sxScores
10-08-2006, 09:39 PM
could it just be your Shifter rattling at the high Rpm? Do you try holding it firm when the noise starts?
pr240sx
10-09-2006, 07:15 AM
DONT BUY a input shaft bearing without checking the tranny!!!!
Lower it and remove the front cover on the bellhousing.
Check http://f7.yahoofs.com/users/4471574ama083d10e/acfb/__sr_/f093.jpg?phoBlKFBUYNBB_pc