belt slip

[BlackSunshine01]

any one else ever have a problem with belt slip on a na2v? i dont really have any crazy mods(sct and exhaust) and when ever i go wot i have the belt screech when ever the car shifts gears, i have all ready changed the tensioner assy and idler pulleys and a new belt. any one ahve any ideas? i dont belive i should need to swap an 8 rib wit all of my 220 rwhp. lol.

*edit* thought i was in gen mustang tech mods pls move accordingly

[raymond8698]

any one else ever have a problem with belt slip on a na2v? i dont really have any crazy mods(sct and exhaust) and when ever i go wot i have the belt screech when ever the car shifts gears, i have all ready changed the tensioner assy and idler pulleys and a new belt. any one ahve any ideas? i dont belive i should need to swap an 8 rib wit all of my 220 rwhp. lol.

*edit* thought i was in gen mustang tech mods pls move accordingly

mine is an auto and it does that sometimes when I accelerate to get in a lane or so, but normally it does not sqeak at all

[BlackSunshine01]

mine gives off a big squeal when it shifts at wot. i belive because of that is why when i pulled the old belt off it had 2 pretty gnarly warped spots in it.

[Bigdrumma22]

Nope, never had the issue in any shape or form, not even when it was wet out. And I gots mo' powah!!

[Stephen]

Try taking the belt off and scrubbing the pulleys with a wire brush and some dawn or something that will degrease well, Sometimes after you've been running an old pulley for a while the belt can almost "polish" the pulleys and cause other belts to slip... but its just a thought.

[BlackSunshine01]

indeed i did good sir. when i bought the new belt most recently, i got some brake cleaner and a wire tooth brush and went to town. still screams like a banchee at a wot shift.

[Bigdrumma22]

indeed i did good sir. when i bought the new belt most recently, i got some brake cleaner and a wire tooth brush and went to town. still screams like a banchee at a wot shift.

True story, he told me about it.

I think I need to go for a ride with you to hear this mysterious squeal... haha.

[BlackSunshine01]

im game. i shouldnt be doing anything on thurs.

[Bigdrumma22]

im game. i shouldnt be doing anything on thurs.

Cool, hey well if you can get my car cleaned up real nice, maybe I'll go to Biff's?? Haha...


Just curious, but what belt brand are you running? I've got dayco I think.

[BlackSunshine01]

currently im running the oreilly brand belt. lol. i didnt want to spend the 40-50 dollars for the better one if it didnt fix my squeak at idle and had to replace my ac or something. but its seem to been doing this sence i put the sct tune on it and boosted my hp. but i know im really not pushing that much.

[Bigdrumma22]

So have you tried putting the stock tune back on just to see if it would stop? This whole issue seems pretty ridiculous since you took all precautions already, which is why I was thinking maybe it's just a crappy belt or something. I've got an extra belt you can try also granted it is used, I keep it as a backup.

[BlackSunshine01]

no i havent put it back to stock. i think i would shoot my self. that damn sct gives the car so much more power.

[Bigdrumma22]

I still never heard this so called belt squeak... I think it's just you making noises...

[BlackSunshine01]

lies! after the gears are broken in well go for another ride and you will hear the squeal!

[Bigdrumma22]

Chyea right... all I'm gonna hear is tire squealin' with all your new found POWA!!

[BlackSunshine01]

ive been burnin rubber with out even trying now. i got to get used to it all. lol.

[Bigdrumma22]

ive been burnin rubber with out even trying now. i got to get used to it all. lol.

Yeah, you've really woken that car up with your last few mods! Just wish I coulda done my gears too.

[BlackSunshine01]

ya yours would have raped for sure wit the 5 spd. mines not bad but from a true performance stand point i should have gone bigger, but for driveabilitys sake im glad i got the 3.73's

[raymond8698]

so you eliminated the belt slip problem???

[Bigdrumma22]

so you eliminated the belt slip problem???

I think he's hearing things, because with how loud his car is and his burnin' rubber from every stop, you wouldn't be able to hear a lil' belt squeak!

[raymond8698]

I think he's hearing things, because with how loud his car is and his burnin' rubber from every stop, you wouldn't be able to hear a lil' belt squeak!

lol, careful from doing stoplight burnouts, cost me 170 bux when SAPDs finest saw me do it

[BlackSunshine01]

no i still have the damn belt slip. i havent really tried anything else to fix it because i dont know what else it could possibly be. i dont think going down the next belt size would make a difference either because my new tensioner should be pulling up the slack.

[Chris@STP]

call me tomorrow and tell me the size you put on there and i will order 2 a little smaller come by and we will try it and see if it helps and if not i can send the belts back. or you might just have a weak tesioner.

[BlackSunshine01]

i replaced the tensioner about a month or 2 ago. so i hope thats not the problem, with that bieng new you think a shorter belt would do anything?

[Bigdrumma22]

i replaced the tensioner about a month or 2 ago. so i hope thats not the problem, with that bieng new you think a shorter belt would do anything?

You never said what brand belt you have? And are you sure it's the correct size? I got my extra belt you can try tonight if you want. I'm leaving tomorrow to Dallas for a few days, but I can head over or you can come over here, whatever. Let me know.

[BlackSunshine01]

i have the oreilly brand belt as i stated in post number 10 sir. its all good. im sure ill get it squared away in time

[Bigdrumma22]

i have the oreilly brand belt as i stated in post number 10 sir. its all good. im sure ill get it squared away in time

MY BAD KILLA! I forgot... I still say you're hearing things...

[BlackSunshine01]

im not dammit! its there i promise!

[Jeramey]

Maybe youre making the noise out of pure joy from moving so quickly...lol but then when others are in the car youre more reserved so you dont make the noise in front of them :P

Try a smaller belt size!!!

[BlackSunshine01]

^lol. but would a smaller belt on a car with a automatic tensioner even do anything?

[Bigdrumma22]

^lol. but would a smaller belt on a car with a automatic tensioner even do anything?

Yeah, it would put more tension on the spring inside the tensioner!

[BlackSunshine01]

But the springs inside those things are not progressive. That's why I asked that.

[Bigdrumma22]

But the springs inside those things are not progressive. That's why I asked that.

Not sure exactly about that, but it's just a coiled up piece of metal, so the tighter you make it coil, the more tension is on it. Maybe you should lower your shift points back down and see if it still does it.

[Jeramey]

But the springs inside those things are not progressive. That's why I asked that.

Yes a tight belt will still help even with the automatic tensioner.

BTW my old race car was nicknamed Black Sunshine. The owner of the shop owns it now and it hauls!

[BlackSunshine01]

BTW my old race car was nicknamed Black Sunshine. The owner of the shop owns it now and it hauls!

cool cool. im a metal head and ever sence i was a kid i would always hear white zombie and listen to him talk about the bad ass black mustang. now i have a nice black mustang just not super fast. lol.

[Bigdrumma22]

Alright, so I went for a test ride with Blacksunshine last night and he was able to replicate the belt noise a couple times. I can definitely say he's not crazy, there is a noise! It sounds a lot like a tire chirp, but a different pitch and you can tell it's from the front of the car. It happens at high RPM when his auto shifts from 2-3 or 3-4 at WOT, not sure exactly what gear it is. Only thing I can think to say is drag from his A/C clutch maybe??

[BlackSunshine01]

i wasnt running the a/c homie we had the windows down.

[Bigdrumma22]

i wasnt running the a/c homie we had the windows down.

... that doesn't mean the bearings in the clutch aren't going out... It still spins with the a/c off ya know...


Man, what am I gonna do with you...

[BlackSunshine01]

true but the clutch isnt engaged if its off. its gotta be the belt. really dosent sound like a bearing squeak to me.

[Bigdrumma22]

Yes, but it could be DRAG from the A/C clutch causing it to squeak... i.e. it's not spinning as fast as the other pullies. That's my thought.