found the illness of my truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigd65 · 01-23-2003, 05:11 PM

yesterday i jacked up my truck and was just checking things out cause the vibration between 45-60 mph was REALLY irritating me. so anyway, i jacked it up and was checking the tires and yep you guessed it, i flat spotted my tires during the MIS-HAP on Christmas morning. then i still had the clatter underneath. i crawled under it and was banging around on things and i found the cat. converter was what is rattling. its not loose or anything , the insides are rattling. this thing is only about 2-3 years old. i think i am going to pull it off and break out the insides and let it ride till it wont pass inspection, then i will replace it.

also just to give an update on the tranny, i dont know if this thing is suppose to do this but i like it and the tranny guy said that there is nothing wrong with the tranny. when i slow to a stop sign i can feel the truck down-shift, almost as if i am manually down-shifting it. i really like that, i brought it to the tranny guys attention and he said it wont hurt it, so i am not complaining. the tranny feels ALOT stronger than it was the first time, so maybe this incident fixed something anyways.

LOHRTBT · 01-23-2003, 05:14 PM

lol...that is cool. Time for new tires!!

Tom · 01-23-2003, 06:28 PM

I can slightly feel my 2004R downshift from 2nd to 1st when stoping quickly. Its a built up unit, so I think its fine. Glad to hear you found your problems. Its amazing how simple it turns out to be 90% of the time.

**swervin ervin** · 01-23-2003, 07:05 PM

Good deal. Glad you figured it out.

apstguy · 01-23-2003, 10:36 PM

Hmmm.... kinda sounds like my truck. I would hate for my truck to have flat spots - the tires are less than a year old.

79BIG10 · 01-24-2003, 03:39 AM

Glad to hear the good new Jeff.

bigd65 · 01-24-2003, 09:35 AM

the front tires are brand new, i got them about 2 weeks before the Christmas mis-hap. ou well its about time for 2 more and they will go on the front and i guess i will just have to FIX these when they are put on the rear :grin:

bigd65 · 01-24-2003, 09:36 AM

the front tires are brand new, i got them about 2 weeks before the Christmas mis-hap. ou well its about time for 2 more and they will go on the front and i guess i will just have to FIX these when they are put on the rear

whoops

gchemist · 01-24-2003, 01:32 PM

Only way to get rid of a flat spot is to light them um baby!!! A few millimeters and they'll be fine.

Glad you found the problem. Good luck with the tranny. I also feel the downshifts pretty hard on mine but only when it's cold. Once it warms up really hot the downshifts less noticable. People usually ask if that's normal. I say yes. :p

01-23-2003, 05:11 PM	#1
bigd65 Registered User Join Date: Mar 2000 Location: Lake Jackson, TX. Posts: 1,930	found the illness of my truck yesterday i jacked up my truck and was just checking things out cause the vibration between 45-60 mph was REALLY irritating me. so anyway, i jacked it up and was checking the tires and yep you guessed it, i flat spotted my tires during the MIS-HAP on Christmas morning. then i still had the clatter underneath. i crawled under it and was banging around on things and i found the cat. converter was what is rattling. its not loose or anything , the insides are rattling. this thing is only about 2-3 years old. i think i am going to pull it off and break out the insides and let it ride till it wont pass inspection, then i will replace it. also just to give an update on the tranny, i dont know if this thing is suppose to do this but i like it and the tranny guy said that there is nothing wrong with the tranny. when i slow to a stop sign i can feel the truck down-shift, almost as if i am manually down-shifting it. i really like that, i brought it to the tranny guys attention and he said it wont hurt it, so i am not complaining. the tranny feels ALOT stronger than it was the first time, so maybe this incident fixed something anyways. __________________ 2004 Silverado Crewcab (Dark Spiral Gray)

01-23-2003, 05:14 PM	#2
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	lol...that is cool. Time for new tires!! __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

01-23-2003, 06:28 PM	#3
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,731	I can slightly feel my 2004R downshift from 2nd to 1st when stoping quickly. Its a built up unit, so I think its fine. Glad to hear you found your problems. Its amazing how simple it turns out to be 90% of the time. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

01-23-2003, 07:05 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Good deal. Glad you figured it out. __________________ Mike 1985 Chevy C-10

01-23-2003, 10:36 PM	#5
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	Hmmm.... kinda sounds like my truck. I would hate for my truck to have flat spots - the tires are less than a year old. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

01-24-2003, 03:39 AM	#6
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	Glad to hear the good new Jeff. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

01-24-2003, 09:35 AM	#7
bigd65 Registered User Join Date: Mar 2000 Location: Lake Jackson, TX. Posts: 1,930	the front tires are brand new, i got them about 2 weeks before the Christmas mis-hap. ou well its about time for 2 more and they will go on the front and i guess i will just have to FIX these when they are put on the rear :grin: __________________ 2004 Silverado Crewcab (Dark Spiral Gray)

01-24-2003, 09:36 AM	#8
bigd65 Registered User Join Date: Mar 2000 Location: Lake Jackson, TX. Posts: 1,930	the front tires are brand new, i got them about 2 weeks before the Christmas mis-hap. ou well its about time for 2 more and they will go on the front and i guess i will just have to FIX these when they are put on the rear whoops __________________ 2004 Silverado Crewcab (Dark Spiral Gray)

01-24-2003, 01:32 PM	#9
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Only way to get rid of a flat spot is to light them um baby!!! A few millimeters and they'll be fine. Glad you found the problem. Good luck with the tranny. I also feel the downshifts pretty hard on mine but only when it's cold. Once it warms up really hot the downshifts less noticable. People usually ask if that's normal. I say yes. :p __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

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