turbo 400 guru's need help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Eyegore · 04-18-2008, 06:04 PM

My transmission yesterday started making the whinning noise, sounded like it was coming from the distributor at first. Since i could not locate the actual problem, I drove it around the block, and now i'm hearing grinding, and hesitation in the transmission. I did have a leak (small), but I'm reluctant to warm the engine and transmission up to check the level because of the whinning noise.

Need your advice.

Tom

454HO · 04-18-2008, 08:46 PM

Does the fluid smell burnt? How many miles on it? I'd say it's probably time to drop the pan and look for metal shavings.

slug · 04-18-2008, 08:50 PM

Quote:

Originally Posted by 454HO

Does the fluid smell burnt? How many miles on it? I'd say it's probably time to drop the pan and look for metal shavings.

x2, i think it would be a good idea to atleast do a fluid/filter change on it. i think a filter is only like $9 and some change. it will also require 5 quarts of fluid. but, it may also have a major problem that may require a rebuild.

Thumpin455 · 04-18-2008, 09:46 PM

Could be the front pump, if it is shifting erratic and doing strange things, the pump could be a big part or all of the problem. Your converter could have broke and now you have something caught in the pump too, seen that a couple times. If the noise changes pitch with engine RPM as opposed to vehicle mph, chances are its in the pump or related parts.

Eyegore · 04-18-2008, 11:03 PM

The filter and fluid were just changed les than 1000 miles ago. I had a slight leak but I worried I ran it down to much.

lurch115 · 04-19-2008, 12:34 AM

had the same issue a few years ago and after the grinding noise started i made it about 3 miles and the tranny let go...

04-18-2008, 06:04 PM	#1
Eyegore What Hump? Join Date: Apr 2003 Location: New River AZ Posts: 2,009	turbo 400 guru's need help My transmission yesterday started making the whinning noise, sounded like it was coming from the distributor at first. Since i could not locate the actual problem, I drove it around the block, and now i'm hearing grinding, and hesitation in the transmission. I did have a leak (small), but I'm reluctant to warm the engine and transmission up to check the level because of the whinning noise. Need your advice. Tom __________________ Lil red 86 c-10 99 Sub 78 Camper Special w/ 454

04-18-2008, 08:46 PM	#2
454HO Registered User Join Date: Apr 2005 Location: Austin, TX Posts: 1,223	Re: turbo 400 guru's need help Does the fluid smell burnt? How many miles on it? I'd say it's probably time to drop the pan and look for metal shavings. __________________ - Greg

04-18-2008, 09:46 PM	#4
Thumpin455 My truck is an alcoholic Join Date: Nov 2007 Location: Marquette Mi Posts: 303	Re: turbo 400 guru's need help Could be the front pump, if it is shifting erratic and doing strange things, the pump could be a big part or all of the problem. Your converter could have broke and now you have something caught in the pump too, seen that a couple times. If the noise changes pitch with engine RPM as opposed to vehicle mph, chances are its in the pump or related parts. __________________ Too much stuff, too many projects to list everything. my 454 urged 76 swb beater

04-18-2008, 11:03 PM	#5
Eyegore What Hump? Join Date: Apr 2003 Location: New River AZ Posts: 2,009	Re: turbo 400 guru's need help The filter and fluid were just changed les than 1000 miles ago. I had a slight leak but I worried I ran it down to much. __________________ Lil red 86 c-10 99 Sub 78 Camper Special w/ 454

04-19-2008, 12:34 AM	#6
lurch115 Registered User Join Date: Oct 2006 Location: iowa Posts: 722	Re: turbo 400 guru's need help had the same issue a few years ago and after the grinding noise started i made it about 3 miles and the tranny let go... __________________ "Horsepower is how fast you hit the wall, torque is how far you carry the wall with you." '84 chevy half ton short box 2wd, 67,000 actual miles '03 chevy 1500 HD crew cab 4x4 standard box, 6.0L



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