Unusual Tranny Sound Between 20-30MPh After Replacing Major Bearings and 1/2 Synchro

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Mar 27, 2006 | 05:17 AM

CPR

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From: T.O./VA

Unusual Tranny Sound Between 20-30MPh After Replacing Major Bearings and 1/2 Synchro

Aftermarket Tranny Parts on the car:
* JDM Final Drive
* Comptech 7lbs Aluminum Flywheel

Here's what was replaced:
* 1/2 Syncho
* 1st Gear (JDM)
* 2nd Gear
* Friction Dampeners on Countershaft
* Pilot Bearing
* Throwout Bearing
* Main/Countershaft bearings on Clutch Housing
* Main/Countershaft bearings at the end of the shafts themselves
* Bearings on both sides of the LSD

Now I have this weird noise that's hard to describe between 20-30mph. It happens in every gear including neutral with both clutch pressed in and out...basically any situation where the car is between the MPH mentioned. Any ideas?

Mar 27, 2006 | 07:14 AM

98R-1144

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From: CA, USA

Is it only at 20mph-30mph? Or in a certain RPM range no matter neutral/gear?

I had one whenver I was at ~25% partial throttle. Turned out to be some loose bearing in the head

Mar 27, 2006 | 07:31 AM

Dave_B

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Joined: Aug 2004

Posts: 12,098

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From: blavica

The only thing I could think of that would make a noise with all of those variables would be the axles. It's a long shot, and I know it wasn't changed, but it's the only thing I can think of.

Mar 27, 2006 | 11:35 AM

cxSHOE

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From: ROLLING PARANOID WITH A SMILE, ca, USA

Re: Unusual Tranny Sound Between 20-30MPh After Replacing Major Bearings and 1/2 Synchro (CPR)

is the sound kinda like when you go in reverse?... that whining sound

it could be the shim clearance between the differential. (check your helms manual and get angled feeler gauges) this is what it was for me when i pulled my tranny and disassembled/reassembled it 7 times... and unfortunately you cant check the noise until its put back on the engine...