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Old 02-11-2009, 10:19 AM   #1
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Exclamation NEED: Goodyear Gator-back belt numbers for SLP underdrive pulley

Like the title states...if anyone knows these numbers I would appreciate it.

The Dayco belt #s are 760K6 and 405K4...but based upon some research it seems like the gator belts are better. So does anyone know that numbrs? This is apart of my cam install coming up and I need get them sometime soon.

Auto Zone carries the belts, but the guy couldn't tell me if they were the right ones or not (I'm pretty sure he pulled up stock belts).

Thanks!
Bryan
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Old 02-11-2009, 10:37 AM   #2
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Check out summit udp and look at the recommended belts on there. Should be the same belts for that pulley if im not mistaken..
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Old 02-11-2009, 11:21 AM   #3
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4060755 - Serpentine Belt
4040400 - A/C Belt

Seth
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Old 02-11-2009, 12:21 PM   #4
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Quote:
Originally Posted by Seth@HSC...View Post
4060755 - Serpentine Belt
4040400 - A/C Belt

Seth

Would those belts be the same for an 04? I have read some say they are different and some say they are the same. Thanks for clearing this up for me.
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Old 02-11-2009, 12:29 PM   #5
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I've heard terrible things about Gatorback belts....I guess they like to shred really fast.
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Old 02-11-2009, 02:37 PM   #6
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04 and 05 are different and to say they shread easily isnt a true statement...Now if you put the wrong belts on then yeah,

I use Goodyear Gatorback 4060760, and 4040405.

The Serpentine belt # is 4060760

The AC Compressor belt # is 4040405

6 rib 76" long belt for the accessory drive, and a 4 rib 40.5" belt for the air conditioner compressor.
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Old 02-11-2009, 03:34 PM   #7
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^^^Holy crap! According to Goodyears' site, that's almost $100 for those belts
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Old 02-11-2009, 04:05 PM   #8
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I am pretty sure that I used the 760 and 400... I have read of people using the 760,755 and 750 for the main drive and 400 or 405 for the other... I found then for $40 but then some nice buy ToddO sold a set to me for just shipping.

Last edited by LaTechGTO; 02-11-2009 at 04:10 PM.
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Old 02-11-2009, 04:22 PM   #9
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Stock belt is fine for an NA car. Unless you have a blower you dont need one.
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Old 02-11-2009, 04:23 PM   #10
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Quote:
Originally Posted by Frans96ss...View Post
Stock belt is fine for an NA car. Unless you have a blower you dont need one.

even for a 25% pully?
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Old 02-11-2009, 04:27 PM   #11
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Question

Quote:
Originally Posted by Frans96ss...View Post
Stock belt is fine for an NA car. Unless you have a blower you dont need one.

humm...Honestly Fran that's the first time that I've heard that...I will be going FI (as you know, lol) so I wouldn't have a problem changing the belts now.

But it's a 25% underdrive...and everywhere that advertises the product says that it requires these belts...

Help me out man!

Thanks,
Bryan
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Old 02-11-2009, 04:31 PM   #12
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Quote:
Originally Posted by Pappa Prich...View Post
^^^Holy crap! According to Goodyears' site, that's almost $100 for those belts

23.60 for the first one and 13.99 for the second one at Autozone

Quote:
Originally Posted by LaTechGTO...View Post
I am pretty sure that I used the 760 and 400... I have read of people using the 760,755 and 750 for the main drive and 400 or 405 for the other... I found then for $40 but then some nice buy ToddO sold a set to me for just shipping.

There were some fitment issues from 04-06 the ones I listed are for an 06/05

Quote:
Originally Posted by xCOLDx...View Post
even for a 25% pully?

YOu need different belts of you change out the pulley.
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Old 02-11-2009, 04:34 PM   #13
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Quote:
Originally Posted by The Rock...View Post
I use Goodyear Gatorback 4060760, and 4040405.

The Serpentine belt # is 4060760

The AC Compressor belt # is 4040405

6 rib 76" long belt for the accessory drive, and a 4 rib 40.5" belt for the air conditioner compressor.


Rock, thanks man...just to be sure, these haven't had any fitment issues with the 06s right?
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Old 02-11-2009, 05:16 PM   #14
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Quote:
Originally Posted by Pappa Prich...View Post
humm...Honestly Fran that's the first time that I've heard that...I will be going FI (as you know, lol) so I wouldn't have a problem changing the belts now.

But it's a 25% underdrive...and everywhere that advertises the product says that it requires these belts...

Help me out man!

Thanks,
Bryan

you deff need a diff belt but im saying you dont need a gator back belt.
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Old 02-11-2009, 06:11 PM   #15
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Gottcha
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Old 02-12-2009, 01:51 AM   #16
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Quote:
Originally Posted by Pappa Prich...View Post
Rock, thanks man...just to be sure, these haven't had any fitment issues with the 06s right?

No sir...I've had it on mine for a while now and have no squeal, slip or abnormal wear. You should be good to go.
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Old 02-12-2009, 08:07 AM   #17
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Quote:
Originally Posted by dansbluegoat...View Post
Would those belts be the same for an 04? I have read some say they are different and some say they are the same. Thanks for clearing this up for me.

these are the ones i am currently using. i could've gone with the 760, but felt the 755 fit better.
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Old 03-11-2009, 09:53 AM   #18
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Quote:
Originally Posted by The Rock...View Post

The Serpentine belt # is 4060760

The AC Compressor belt # is 4040405

Correctomundo.
Those who try to fit 4060755 on '06 - good luck.
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Old 03-14-2009, 07:06 PM   #19
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Quote:
Originally Posted by NA1...View Post
Correctomundo.
Those who try to fit 4060755 on '06 - good luck.

Um...I just installed a 4060755 today. The installation was a piece of cake. I got that one because they didn't have the 4050760.

Gerry
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Old 03-14-2009, 07:21 PM   #20
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http://www.ls1gto.com/forums/showthread.php?t=300808


Interestingly enough the autozone guy tried to look up the stock belt sizes despite me telling him I have an underdrive pully ... about 5 times!! I even told him exactly what I needed! a 6 rib 76" and a 4 rib 40".

Low and behold he shows up with a dayco 5060760 and a 5040400. I bought both and got the hell out of that place...

Both belts are working GREAT!
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Old 03-14-2009, 07:27 PM   #21
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I did the opposite...told her I needed one for an 06 GTO...she went and got it, and I then went DOH!!! Sorry...can you bring me one with the same number, but 760 on the end? Thought I'd give the GB a shot. My dayco was trashed.

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Old 03-15-2009, 06:40 PM   #22
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Gerry,

Just wondering, did you have the polly Cog Daycos?
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Old 03-15-2009, 06:55 PM   #23
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Must have Dayco on the brain...just checked, and it was a Gates Micro-V. Had 45,000 miles on it, and had a nice chunk missing out of a couple ribs.

Gerry
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Old 03-15-2009, 06:57 PM   #24
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Okay, I was just wondering bc I decided to go with the dayco polly cog...I think they should be just fine for now. Thanks!
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Old 03-15-2009, 07:08 PM   #25
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Quote:
Originally Posted by The Rock...View Post
04 and 05 are different and to say they shread easily isnt a true statement...Now if you put the wrong belts on then yeah,

I use Goodyear Gatorback 4060760, and 4040405.

The Serpentine belt # is 4060760

The AC Compressor belt # is 4040405

6 rib 76" long belt for the accessory drive, and a 4 rib 40.5" belt for the air conditioner compressor.

Quote:
Originally Posted by The Rock...View Post
23.60 for the first one and 13.99 for the second one at Autozone



There were some fitment issues from 04-06 the ones I listed are for an 06/05



YOu need different belts of you change out the pulley.



Good info. Bookmarked.



P.S. ....don't forget to get a new balancer bolt if you dont already have one when doing any UDP!
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Old 03-15-2009, 07:13 PM   #26
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Quote:
Originally Posted by CoolAid...View Post
P.S. ....don't forget to get a new balancer bolt if you dont already have one when doing any UDP!

Yup! Came with the SLP
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Old 03-15-2009, 07:40 PM   #27
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Quote:
Originally Posted by CoolAid...View Post
Good info. Bookmarked.



P.S. ....don't forget to get a new balancer bolt if you dont already have one when doing any UDP!

x3!

They are like 6 bux from a local stealership!
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Old 03-18-2009, 08:51 PM   #28
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Quote:
Originally Posted by ShoddyHog...View Post
Um...I just installed a 4060755 today. The installation was a piece of cake. I got that one because they didn't have the 4050760.

Gerry

Weird. Didn't fit mine, simply too tight while 4060760 Gatorback was just perfect.
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Old 03-19-2009, 04:00 AM   #29
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Quote:
Originally Posted by NA1...View Post
Weird. Didn't fit mine, simply too tight while 4060760 Gatorback was just perfect.

I'm pretty sure I read that the last three digits are measurements in milimeters, so that would make it only 5mm shorter.

Gerry
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Old 03-19-2009, 02:14 PM   #30
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Quote:
Originally Posted by ShoddyHog...View Post
I'm pretty sure I read that the last three digits are measurements in milimeters, so that would make it only 5mm shorter.

Gerry

Nope. 755 = 75.5 inch (LENGTH) and 760 = 76.0 inch (LENGTH), quite a difference

Here is an example - http://store.summitracing.com/partde...=GTR%2D4060760
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