tranny sound help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dell · 04-15-2007, 09:52 AM

just got a 72 blazer that has a 350 thm. when i put it in gear it makes a sound for just a few seconds. Kind of a sanding sound ( hard to explain). This truck has set since 02. Any Help ?

dell · 04-15-2007, 09:57 AM

just bought a 72 blazer. has not been driven reularly since 02. when i put it in gear it makes a kind of sanding sound for a few seconds. help please.

bouncytruck · 04-15-2007, 10:36 AM

is it an auto or manual.

dell · 04-15-2007, 10:38 AM

i just bought a 72 blazer that has not been driven, except around the block since 02. when i put it in gear it makes a sanding gritting sound for a few seconds, it shifts fine and runs good Plaese help

dell · 04-15-2007, 10:51 AM

auto i changed the filter and pan gasket.

bouncytruck · 04-15-2007, 01:57 PM

Where there any metal particles in the fluid? What did the fluid look like? Is your transfercase not completely in gear?

RED72blazer · 04-15-2007, 03:23 PM

I'm no tranny expert, But it soumds like your planetary gears in your transmission are shot. rebuild time!

*rage'nrat638* · 04-15-2007, 07:45 PM

well it's very hard to know..
but i would suggest a fluid & filter change and remove the inspection cover and look for a mouse nest or something rubbing the converter, or possible loose converter to flex plate bolts.

it could be the pump.

hows the fluid look?

hope this helps mark

*rage'nrat638* · 04-15-2007, 08:59 PM

answered your double post in the engine section

dell · 04-15-2007, 09:10 PM

fluid looked good. bottom of pan was gritty but nothing big enough to see

*rage'nrat638* · 04-15-2007, 09:20 PM

answered your post in the engine section

gave reference to your post on the 67-72 message board

and now here..you only need one post..
read the rules !!!!:rulz:

dell · 04-15-2007, 09:21 PM

i already changed the filter and gasket, fluid looked good.

*rage'nrat638* · 04-15-2007, 09:26 PM

well lets see...

you've posted this question here..
you've posted this question on the 67-72 message board..
you've posted this question on the blazer forum..

your only allowed one post . not one on in every section

:rulz:

krue · 04-15-2007, 09:29 PM

I fixed it, merged the three posts into one, maybe he'll get his answer.

*rage'nrat638* · 04-15-2007, 09:32 PM

thanks krue

i was wondering where all i would find this

dell · 04-15-2007, 10:04 PM

sorry new here. i tried posting this am on the blazer forum but they werent showing up so tried the other one.

*rage'nrat638* · 04-15-2007, 10:17 PM

all is forgiven

hope you get it figured out

your pal mark

bouncytruck · 04-16-2007, 12:11 AM

I'd guess that something may have tanked in the transmission. My guess would be you've got something broken inside there. I had a similar problem on my '69. It turned out to be one of the bearings had basically exploded sending chucks throughout the case. The chucks got wedged between the planitary gears and the case and damaged a whole bunch more internals and cracked the case.

cableguy0 · 04-16-2007, 12:27 AM

theres quite a few things it could be as mentioned. the planetarys can chew up the roller bearings. the pump can make that noise the sprags can make that noise. theres a couple torrington bearings that could also make that noise if they started to come apart.to find the answer to your question will probably require a complete teardown to locate the bad part and a rebuild

04-15-2007, 09:52 AM	#1
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	tranny sound help just got a 72 blazer that has a 350 thm. when i put it in gear it makes a sound for just a few seconds. Kind of a sanding sound ( hard to explain). This truck has set since 02. Any Help ?

04-15-2007, 09:57 AM	#2
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	tranny sound just bought a 72 blazer. has not been driven reularly since 02. when i put it in gear it makes a kind of sanding sound for a few seconds. help please.

04-15-2007, 10:36 AM	#3
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: tranny sound is it an auto or manual. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

04-15-2007, 10:38 AM	#4
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	tranny sound i just bought a 72 blazer that has not been driven, except around the block since 02. when i put it in gear it makes a sanding gritting sound for a few seconds, it shifts fine and runs good Plaese help

04-15-2007, 10:51 AM	#5
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	Re: tranny sound auto i changed the filter and pan gasket.

04-15-2007, 01:57 PM	#6
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: tranny sound Where there any metal particles in the fluid? What did the fluid look like? Is your transfercase not completely in gear? __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

04-15-2007, 03:23 PM	#7
RED72blazer urban fourwheelin Join Date: Aug 2002 Location: Seattle Posts: 1,007	Re: tranny sound I'm no tranny expert, But it soumds like your planetary gears in your transmission are shot. rebuild time! __________________ 1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage.

04-15-2007, 07:45 PM	#8
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound well it's very hard to know.. but i would suggest a fluid & filter change and remove the inspection cover and look for a mouse nest or something rubbing the converter, or possible loose converter to flex plate bolts. it could be the pump. hows the fluid look? hope this helps mark

04-15-2007, 08:59 PM	#9
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound help answered your double post in the engine section

04-15-2007, 09:10 PM	#10
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	Re: tranny sound fluid looked good. bottom of pan was gritty but nothing big enough to see

04-15-2007, 09:20 PM	#11
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound answered your post in the engine section gave reference to your post on the 67-72 message board and now here..you only need one post.. read the rules !!!!:rulz:

04-15-2007, 09:21 PM	#12
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	Re: tranny sound i already changed the filter and gasket, fluid looked good.

04-15-2007, 09:26 PM	#13
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound well lets see... you've posted this question here.. you've posted this question on the 67-72 message board.. you've posted this question on the blazer forum.. your only allowed one post . not one on in every section :rulz:

04-15-2007, 09:29 PM	#14
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: tranny sound help I fixed it, merged the three posts into one, maybe he'll get his answer. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-15-2007, 09:32 PM	#15
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound help thanks krue i was wondering where all i would find this



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04-15-2007, 10:04 PM	#16
dell Registered User Join Date: Mar 2007 Location: texas Posts: 16	Re: tranny sound help sorry new here. i tried posting this am on the blazer forum but they werent showing up so tried the other one.

04-15-2007, 10:17 PM	#17
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: tranny sound help all is forgiven hope you get it figured out your pal mark

04-16-2007, 12:11 AM	#18
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: tranny sound help I'd guess that something may have tanked in the transmission. My guess would be you've got something broken inside there. I had a similar problem on my '69. It turned out to be one of the bearings had basically exploded sending chucks throughout the case. The chucks got wedged between the planitary gears and the case and damaged a whole bunch more internals and cracked the case. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

04-16-2007, 12:27 AM	#19
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: tranny sound help theres quite a few things it could be as mentioned. the planetarys can chew up the roller bearings. the pump can make that noise the sprags can make that noise. theres a couple torrington bearings that could also make that noise if they started to come apart.to find the answer to your question will probably require a complete teardown to locate the bad part and a rebuild __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

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