"Screech" Sound at 1-2 Shift

F9K9 · Post by **F9K9** » Sat May 05, 2007 8:50 am

I thought I heard the sound once before but, had the music up and just blew it off. I just made a short run to a country store and twice while under moderate acceleration I got a definite "screech" sound at the 1-2 shift. It sounds just like a belt screech. My belt is maybe 9 months old (replaced at the CS144 alternator upgrade. CC is under yrs old and under 30K miles on the "ticker". Maybe a belt tensioner growing weak? Any other possibilities?

2kwik4u · Post by **2kwik4u** » Sat May 05, 2007 9:35 am

Only time I've ever heard a belt screech on a 1-2 shift was on a lightning with a built trans and running double stock boost. Trans would shift faster, pull the motor down faster than the blower could slow down......Truly odd sound, and a very unique situation. I wouldn't expect the engine belt to be squeeking on a mildly modified 4.3/4L60E combo. I'd pull the belt off, throw it in the passenger seat, and run down the street. Get one or two 1-2 shifts, and see what happens. That will tell you real quick if it's the belt or one of the accessory drives.

With that said, I have no other ideas what it might be.

Never heard a trans make that noise on a 1-2 shift. What mods has the trans seen? Fluid level OK?

Any chance it's the clutchs in the rear end? Checked the fluid back there lately? Just another thought.

Post by **HenryJ** » Sat May 05, 2007 9:58 am

It is the belt. Mine does it under hard acceleration all the time.
I doubt it is the fault of the tensioner, as I said mine has done this from day one.
The smaller alternator pulley, or lack of a clutch fan may accentuate the effect?
I have used the stock belt, and a NAPA replacement. Same deal...screech at the 1-2 shift under full throttle.

Someone mentioned "Gatorback" belts. I run a belt shorter than stock to improve the clearance on the lower radiator hose and make up for the smaller alternator pulley.

What is the answer? "Doctor, it hurts when I do this..." Answer: "Don't do that!"

Perhaps another belt would work. I don't screech mine all that often. It is not on my priority list right now.

F9K9 · Post by **F9K9** » Sat May 05, 2007 10:13 am

HenryJ wrote:...................................What is the answer? "Doctor, it hurts when I do this..." Answer: "Don't do that!"...........................................

That was what I was hoping to hear. Sounded to much like a belt to be anything else. I usually lay off the AC and have my windows down in warm weather and so, I knew it was from up front. I can't duplicate it every time but, it's definitely from moderate throttle. I'll put the issue on the back burner for now.

To busy patting myself on the back for my near completion of my first rear main replacement without missing any waterfowl

doughboy5499 · Post by **doughboy5499** » Sat May 05, 2007 4:34 pm

I put a gator belt on my cc about a year and a half ago and have never heard this noise. Don't recall it doing it before then though either. I drive hard I have a led foot on the start all the time and it don't do it. Could be just my truck or it could be because of the Gatorbelt too but.......

F9K9 · Post by **F9K9** » Sat May 05, 2007 5:11 pm

doughboy5499 wrote:.....Could be just my truck or it could be because of the Gatorbelt too but.......

I really think it is just a fluke for now. I have been putting off little things with my Crew due to working on the Heep. I knew that the Crew was a dependable steed for parts or tool runs even though it has some minor non life threatening issues right now (minor stuff like my am/fm antenna came unplugged when I worked on my XM radio last time). The Heep was a P/T dd and is down right now. New sounds from my trusty rig kinda freaked me though.

I think Brule is correct and I just over reacted..

I appreciate all the input though

killian96ss · Post by **killian96ss** » Sat May 05, 2007 6:14 pm

I have Goodyear Gatorback belts on all my cars and none of them ever squeak or squeal.

They are IMO the best belts made.

Steve

F9K9 · Post by **F9K9** » Sat May 05, 2007 6:22 pm

killian96ss wrote:I have Goodyear Gatorback belts on all my cars and none of them ever squeak or squeal.

They are IMO the best belts made.

Steve

Have often thought about them and will give them a try when I get a chance. I figure that if, they are good enough for Steve........I'll give 'em a shot

WVHogRider · Post by **WVHogRider** » Sun May 06, 2007 6:41 am

f9k9 wrote:
killian96ss wrote:I have Goodyear Gatorback belts on all my cars and none of them ever squeak or squeal.

They are IMO the best belts made.

Steve
Have often thought about them and will give them a try when I get a chance. I figure that if, they are good enough for Steve........I'll give 'em a shot

Got the Gatorback on mine too...

daevans315 · Post by **daevans315** » Tue May 08, 2007 6:33 am

killian96ss wrote:I have Goodyear Gatorback belts on all my cars and none of them ever squeak or squeal.

They are IMO the best belts made.

Steve

The Gatorback belts are the only ones that don't chirp at WOT shifts on my 97 s-10 with a shift kit.

At my 50,000 mile tune up I put one on the crew and love it.

F9K9 · Post by **F9K9** » Tue May 08, 2007 1:11 pm

daevans315 wrote:..........The Gatorback belts are the only ones that don't chirp at WOT shifts on my 97 s-10 with a shift kit.

At my 50,000 mile tune up I put one on the crew and love it.

I'll try one when my current Gates becomes irritating. I dread changing it again because of the hassle I had finding the correct size after my alternator upgrade

Post by **HenryJ** » Tue May 08, 2007 1:19 pm

f9k9 wrote:...I dread changing it again because of the hassle I had finding the correct size after my alternator upgrade

I'll second that! One more problem is no local stores carry the Gatorback belts here. No way am I going to mail order a belt and return it three times trying to find one that works.
I will live with what I have.

killian96ss · Post by **killian96ss** » Wed May 09, 2007 6:09 am

f9k9 wrote:I'll try one when my current Gates becomes irritating. I dread changing it again because of the hassle I had finding the correct size after my alternator upgrade

All you need to do is take the # off your current belt and order a replacement belt.

The # on the belt is the correct size (mm).

C'mon you guys should already know that.

Most Checker, Schucks, and Kragen auto parts stores carry the Gatorback belts.

Summit can also cross reference you current belt # to get the correct Gatorback.

Steve

F9K9 · Post by **F9K9** » Wed May 09, 2007 7:28 am

killian96ss wrote:...........
Most Checker, Schucks, and Kragen auto parts stores carry the Gatorback belts...........

Steve

Don't have those stores here.

killian96ss · Post by **killian96ss** » Wed May 09, 2007 8:22 am

f9k9 wrote:
killian96ss wrote:...........
Most Checker, Schucks, and Kragen auto parts stores carry the Gatorback belts...........

Steve
Don't have those stores here.

If you can still see the part # on your current belt, write it down and use it for reference later.

Steve

doughboy5499 · Post by **doughboy5499** » Thu May 10, 2007 3:32 am

I got my Gatorback at Advanced Auto.

F9K9 · Post by **F9K9** » Thu May 10, 2007 3:52 pm

doughboy5499 wrote:I got my Gatorback at Advanced Auto.

I bought lunch today for a manager of our local Advance Auto and he is checking into special ordering a couple different sizes for me. He is also a member of one of our local crawler clubs so, I should be good to go.

killian96ss · Post by **killian96ss** » Thu May 10, 2007 4:23 pm

f9k9 wrote:
doughboy5499 wrote:I got my Gatorback at Advanced Auto.
I bought lunch today for a manager of our local Advance Auto and he is checking into special ordering a couple different sizes for me. He is also a member of one of our local crawler clubs so, I should be good to go.

Were you able to read the # on the belt your using right now?

If you can still read the # it would make it easy for him to cross reference it to a Goodyear belt.

Steve

F9K9 · Post by **F9K9** » Thu May 10, 2007 5:39 pm

killian96ss wrote:.........Were you able to read the # on the belt your using right now?......

I really haven't had the chance to look yet, Steve. I spend what available daylight that I have trying to finish up the Jeep repairs but, I will. The places that I am currently wheeling are to tight for CC because a SFAed ZR2 with D44 front and 20 rear is unable to easily do it.

Post by **HenryJ** » Wed Sep 03, 2008 3:00 pm

I changed to a Gatorback recently. You guys were all right. The chirp at WOT shift is gone. Any cold chirpy noises are gone.

That belt did the trick.

I did try both NAPA (Gates?) and AC Delco belts. Nothing beats the Gatorback. That will be my choice from now on.
Thanks!

killian96ss · Post by **killian96ss** » Wed Sep 03, 2008 4:00 pm

The Gatorback belt definitely has the best design out there right now.

The Gates Poly-Cog is similar in design, however the placement of the cogs (parallel pattern instead of the 45 degree pattern that the Gatorback has) creates a vibration or hum.

Steve

YellowCrewCabber · Post by **YellowCrewCabber** » Mon Dec 15, 2008 2:22 pm

I guess I believe in getting my monies worth. Original OEM belt with 118K miles on it.

10 years ago I bought a new '98 2.2L Ext. Cab Sonoma. Put over 100K miles on that belt before I changed it. Pushing the envolope on this belt.

YCC

Horsehammerr · Post by **Horsehammerr** » Sun Mar 12, 2017 2:42 am

This SCREECH I'm hearing is for sure coming from the rear of my CC. I hear it at about 40mph coming from the rear of the cab. First thought I was hearing an oncoming Siren, but when I let off the throttle to pull over it stopped. Accelerate and it's back. If I stay below 30mph its quiet.

Horsehammerr · Post by **Horsehammerr** » Sun Mar 12, 2017 3:01 pm

Checked Gear Grease level and found below full. Took 1 1/2 quarts to fill to bottom of fill hole. still makes minor growl sound when coming to stop. Suggestions ? Can see no obvious leak locations. Been couple years since last grease replacement.

Horsehammerr · Post by **Horsehammerr** » Tue Mar 14, 2017 3:08 am

Can someone Lead me to the right 8 1/2" rear Differential to replace my Stock '02 ?

_STUCKY · Post by **_STUCKY** » Tue Mar 14, 2017 4:12 am

I don't know if you are 3.73 or not but there has been a zr2 axle on the Hannibal craigslist for awhile. He wants too much for it in my opinion, but it's there.

https://quincy.craigslist.org/pts/6030356154.html

S-10CREWCAB.NET

"Screech" Sound at 1-2 Shift

"Screech" Sound at 1-2 Shift

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Re: "Screech" Sound at 1-2 Shift

Re: "Screech" Sound at 1-2 Shift