Knocking sound.
Senior User
Joined: Mar 2007
Posts: 205
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Originally Posted by ola1234
I was told this sound was first heard after a transmission rebuild.
What should I do next?
What should I do next?
check to see that the transmission is "flush up" to the block all the way around (nothing caught in between) and the bolts are tight...........
next, remove the bolts between the converter and the flywheel.....slide the converter back away from the flywheel........then look for any cracks in the flywheel.............now bring the converter backup to the flywheel....install one bolt very loosely......rotate the flywheel and compare the distance between the flywheel and each mounting tab of the converter........you are looking for a noticeable difference in the gap between the flywheel and tabs............if the flywheel is in a "bind" when you bolt up the converter , it will cause a loud "hard hitting" noise from the flexing and will soon crack the flywheel.....
crossbones
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Did you check the oil pressure with a manual guage....... the narmal sender is on the rear of the engine block top... on the turbo when turbo equiped I think..
I have seen flywheels on auto trans crack and cause these noises, also loose torque convertor bolts.
Mine has a knock when cold probably a wrist pin, but once warm it goes away and runs fine......
Yes the pan can be removed in truck, but your about 5 steps from complete removal which would make things significantly easier. With the noise appearing after the trans repair I would remove the engine...... the trans would still be in place and easily checked over.
If you want R&R instructions for pan or engine send me a PM with your email addy ask for: Engine and pan R&R
I have seen flywheels on auto trans crack and cause these noises, also loose torque convertor bolts.
Mine has a knock when cold probably a wrist pin, but once warm it goes away and runs fine......
Yes the pan can be removed in truck, but your about 5 steps from complete removal which would make things significantly easier. With the noise appearing after the trans repair I would remove the engine...... the trans would still be in place and easily checked over.
If you want R&R instructions for pan or engine send me a PM with your email addy ask for: Engine and pan R&R
Last edited by PLC7.3; Sep 2, 2007 at 11:12 AM.
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