help please - Pirate4x4.Com : 4x4 and Off-Road Forum

86_Blazer · 02-12-2003, 02:47 PM

i have an 86 K-5 blazer and have recently heard what sounds like grinding gears. it only happens when im traveling at speeds above 55 and only when i let off on the gas, it makes the sound for a few seconds and then stops. The same thing happens when getting back on the gas, there is also a clicking sound comeing from the rear diverside tire please help

Pdaddy · 02-12-2003, 02:55 PM

The grinding thing almost sounds more like d line vibration to me, your ujoints cool? pinion angle correct? shake the rear wheel and see if it clunks pops or feels loose, wheel bearing???

Get under truck and get busy! LOL

86_Blazer · 02-12-2003, 03:16 PM

i checked the u joints and they are both fine, as for the wheel bearing do think that it needs replacement, but would that account for high speed noises? how do you check if the pinon angle is too much

4x4realm · 02-12-2003, 04:15 PM

jack the rear of the truck off the ground block the front and put it in nutral and roll a rear tire forward and backward to try and hear the noise. sounds like a u joint to me. is the truck stock height or how much lifted ?

86_Blazer · 02-12-2003, 04:20 PM

it has a 4 inch suspension lift with 33 inch tires if it matters

4x4realm · 02-12-2003, 11:02 PM

Did you have the drive line extended after the lift ?

86_Blazer · 02-12-2003, 11:47 PM

no

TEAM X-TREME · 02-13-2003, 01:00 AM

Yea it does matter if its lifted. Thats why he asked. Your problem is your splines on your slip yoke on the rear driveline are worn out. No stress until it was lifted. A quick fix if not to worn out is to fill it up with grease and keep jammed full of greese.

kd7srj · 02-13-2003, 03:24 PM

get under it with the wheels blocked and in neutral grab your rear driveline and jerk it hard and see what moves and doesnt twist...sounds like a pinion bearing but i cant hear it from here!

86_Blazer · 02-13-2003, 05:15 PM

thanks all for the help, unfortunaly i have to wait until i get home during spring break to check things but thanks all

02-12-2003, 02:47 PM	#1 (permalink)
86_Blazer Registered User Join Date: Feb 2003 Member # 16950 Location: california Posts: 23	help please i have an 86 K-5 blazer and have recently heard what sounds like grinding gears. it only happens when im traveling at speeds above 55 and only when i let off on the gas, it makes the sound for a few seconds and then stops. The same thing happens when getting back on the gas, there is also a clicking sound comeing from the rear diverside tire please help

02-12-2003, 02:55 PM	#2 (permalink)
Pdaddy Registered User Join Date: Nov 2001 Member # 8133 Location: Back in Kansas Posts: 5,390	The grinding thing almost sounds more like d line vibration to me, your ujoints cool? pinion angle correct? shake the rear wheel and see if it clunks pops or feels loose, wheel bearing??? Get under truck and get busy! LOL __________________ LCQ / KOH 09 Co-Driver #62 Midwestwheeler / Hardline Custom

02-12-2003, 04:15 PM	#4 (permalink)
4x4realm Registered User Join Date: May 2001 Member # 4737 Location: redding, ca Posts: 405	jack the rear of the truck off the ground block the front and put it in nutral and roll a rear tire forward and backward to try and hear the noise. sounds like a u joint to me. is the truck stock height or how much lifted ? __________________ 1989 Chevy Blazer 350 V8

02-12-2003, 11:02 PM	#6 (permalink)
4x4realm Registered User Join Date: May 2001 Member # 4737 Location: redding, ca Posts: 405	Did you have the drive line extended after the lift ? __________________ 1989 Chevy Blazer 350 V8

02-13-2003, 01:00 AM	#8 (permalink)
TEAM X-TREME Registered User Join Date: Dec 2000 Member # 2643 Location: Redding C.A. Posts: 418	Yea it does matter if its lifted. Thats why he asked. Your problem is your splines on your slip yoke on the rear driveline are worn out. No stress until it was lifted. A quick fix if not to worn out is to fill it up with grease and keep jammed full of greese. __________________ 1985 TOY TRUCK, FULL BLOWN CHEVY 350 V8, DUAL 4 BRL EDELBROCKS ON A 6-71 WEIAND. RUNNING ON METHANE. 625+ HP. REAR DANA 70 WITH DISK BRAKES, 60 FRONT, WELDED & LOCKED, 44"BOGGERS, FULL HYDRAULIC STEERING, RADIATOR IN BED, TILT FRONTEND, W9000I ( YES IT IS BUILT MOSTLY FOR ROCKCRAWLING, WITH A LITTLE EXTRA HP ). www.4x4realm.com

02-12-2003, 03:16 PM	#3 (permalink)
86_Blazer Registered User Join Date: Feb 2003 Member # 16950 Location: california Posts: 23	i checked the u joints and they are both fine, as for the wheel bearing do think that it needs replacement, but would that account for high speed noises? how do you check if the pinon angle is too much

02-12-2003, 04:20 PM	#5 (permalink)
86_Blazer Registered User Join Date: Feb 2003 Member # 16950 Location: california Posts: 23	it has a 4 inch suspension lift with 33 inch tires if it matters

02-12-2003, 11:47 PM	#7 (permalink)
86_Blazer Registered User Join Date: Feb 2003 Member # 16950 Location: california Posts: 23	no

02-13-2003, 03:24 PM	#9 (permalink)
kd7srj Registered User Join Date: Jan 2003 Member # 16401 Location: BOZO Idaho Posts: 592	get under it with the wheels blocked and in neutral grab your rear driveline and jerk it hard and see what moves and doesnt twist...sounds like a pinion bearing but i cant hear it from here! __________________ 85 toyota P.U.caged, Bobbed, chevy rears, 529's ,rearmains up front, spools, crossover steering, limited to 33's till I get longfields, changing birfs on the trail sucks.

02-13-2003, 05:15 PM	#10 (permalink)
86_Blazer Registered User Join Date: Feb 2003 Member # 16950 Location: california Posts: 23	thanks all for the help, unfortunaly i have to wait until i get home during spring break to check things but thanks all

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