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03-26-2019
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#1 |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Not an lt5, but an lt4 question.
I know it's a zr1 forum, but being it's a trans issue, I assume it's the same or similar.
Boss acquired a white 96 lt4 last fall and wants to sell it this spring. It's got 72k miles and runs great. After coming out of winter storage it's making a whiirrrrr-ing noise when the clutch is out. Shifts fine and I can't feel anything goofy, but it's a concerning noise. Drove it around the block to see if it just needed to get the fluids up and around but to no avail. Thoughts? |
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03-26-2019
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#2 |
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Join Date: Apr 2018
Location: Lone Star State
Posts: 99
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Re: Not an lt5, but an lt4 question.
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Ross Lone Star State 90 ZR-1 Red/Red (Sold) 94 ZR-1 Blk/Blk (Sold) 91 ZR-1 DRM/Tan (Sold) 90 ZR-1 Red/Red (Sold) |
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03-26-2019
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#3 | |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Not an lt5, but an lt4 question.
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H 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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03-26-2019
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#4 |
 
Join Date: Apr 2017
Location: Wayne Illinois
Posts: 397
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Re: Not an lt5, but an lt4 question.
And if you install the bushing type bearing, make absolutely sure that they do not grease it during installation. It will make the sintered bronze bushing fail at around 5-10% of it's expected life.
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 91-#1935 Black/black & gray, Haibeck 500 Cams by Pete |
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03-26-2019
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#5 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,714
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Re: Not an lt5, but an lt4 question.
Agree completely with all earlier comments.
Also recommend changing tranny oil with Castrol synthetic 10w60 engine oil. |
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03-29-2019
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#6 |
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Join Date: Nov 2017
Location: Santa Barbara CA
Posts: 51
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Re: Not an lt5, but an lt4 question.
Does the sound change when you're in neutral vs any gear?
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1993 Bright Aqua Metallic # 027 |
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03-29-2019
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#7 | |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Re: Not an lt5, but an lt4 question.
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When it's in gear and you're moving it doesn't make that noise it's just when you're stopped and in neutral |
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03-29-2019
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#8 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,714
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Re: Not an lt5, but an lt4 question.
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03-29-2019
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#9 | |
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Join Date: Nov 2017
Location: Santa Barbara CA
Posts: 51
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Re: Not an lt5, but an lt4 question.
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That's a good sign. If it was making noise all the time, except with the clutch pressed in, I would be more concerned. I've hand much more serious issues that first appeared to be throw out bearings. (ironically on an LT4) Suggest cheapest thing first and check fluid level and quality as others have said... If it was working fine when parked, and no leaks, there could be oxidation somewhere that froze something. Next, the trans comes out and you'll know quickly as others have suggested. +1 on the Bronze bushing. My $.02 Good luck!
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1993 Bright Aqua Metallic # 027 |
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03-30-2019
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#10 | |
 
Join Date: Feb 2012
Location: Ledyard,CT
Posts: 8,171
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Re: Not an lt5, but an lt4 question.
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Linear Mode
