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csx4350 · 07-21-2013

I recently bought a 1990 ZR1 with 22k on the clock. The car runs & drives very well, very tight and with the exception of the rear speakers everything works as it's supposed to. One thing I noticed was a transmission whine, but I have a large collection of 60's & 70's muscle cars and tranny whine is common on the straight cut gears in old trannys so it didn't worry me. I took my mechanic for a ride last night, and his first words were that the transmission input shaft bearing is whining and needs to be replaced. I was already a bit worried about the clutch, it seems to be engaging awfully high in the pedal throw, but there's no slipping. I could really do without the bearing being trashed though.

My questions are:

Is a transmission whine normal or is it indicative of a problem with the ZF6?

Does the ZF require a specialist to work on it or can we do the bearing ourselves?

I've been reading here about using the Castrol TWS for trans lube. My assumption is that the car has the original lube in the trans & diff, both of which I intended to change ASAP. Is it possible that changing the lube will quiet the noise down? What is the trans fluid capacity?

How about the clutch, I assume the high engagement isn't normal. Any recommendations on a bulletproof replacement?

TIA

John

07-21-2013	#1
csx4350 Join Date: Jul 2013 Location: Seguin TX Posts: 7	New (to me) ZR1 with Trans Problem? I recently bought a 1990 ZR1 with 22k on the clock. The car runs & drives very well, very tight and with the exception of the rear speakers everything works as it's supposed to. One thing I noticed was a transmission whine, but I have a large collection of 60's & 70's muscle cars and tranny whine is common on the straight cut gears in old trannys so it didn't worry me. I took my mechanic for a ride last night, and his first words were that the transmission input shaft bearing is whining and needs to be replaced. I was already a bit worried about the clutch, it seems to be engaging awfully high in the pedal throw, but there's no slipping. I could really do without the bearing being trashed though. My questions are: Is a transmission whine normal or is it indicative of a problem with the ZF6? Does the ZF require a specialist to work on it or can we do the bearing ourselves? I've been reading here about using the Castrol TWS for trans lube. My assumption is that the car has the original lube in the trans & diff, both of which I intended to change ASAP. Is it possible that changing the lube will quiet the noise down? What is the trans fluid capacity? How about the clutch, I assume the high engagement isn't normal. Any recommendations on a bulletproof replacement? TIA John Last edited by csx4350; 07-21-2013 at 11:29 PM.