Tranny Fluid Exchange/ Filter... & Dex-Cool Question
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,263
Likes: 48
From: NJ
Tranny Fluid Exchange/ Filter... & Dex-Cool Question
All the local Chevy Dealers are now using the BG Fluid Exchange method for Tranny, Coolant & Brake Fluid Flush. Dealer claims no need to change tranny filter with fluid change utilizing this method, since it's hooked up to tranny lines, & back flushes & cleans everything...spools, filter screens, etc. True??
Also, noticed in the BG Products brochure, for the coolant flush, they use a chemical flush and liquid sealant. Is the sealant ok to use with Dex-Cool? Recall reading about sealant tablets causing problems with Dex-Cool...clogged heater cores. But BG says it's a liquid sealant.
Also, noticed in the BG Products brochure, for the coolant flush, they use a chemical flush and liquid sealant. Is the sealant ok to use with Dex-Cool? Recall reading about sealant tablets causing problems with Dex-Cool...clogged heater cores. But BG says it's a liquid sealant.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (LIGHTNING)
I would not allow them to put any sealer in the cooling system. There was a TSB on some GM models with Dexcool and the sealer pellets, but most of the Dexcool problems have to do with running the system low. This is from a paper presented a couple of years ago jointly by GM and Texaco.
Not sure why you would want to put in a sealer?
Not sure why you would want to put in a sealer?
Safety Car
Joined: Nov 2000
Posts: 4,549
Likes: 30
From: Shenandoah Valley Virginia
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (LIGHTNING)
I operated a repair service facility for quite a number of years. Regardless of what the literature ( propaganda ) says, I would change the filter when doing a transmission fluid change. Those machines are designed to do a quick - not labor intensive swap of the fluid in a transmission. They do NOT clean the filter. Back flushing just blows the crap collected in the filter back through all the pumps, valves etc in the transmission. Drop the pan, change the filter, then use the machine to get all the fluid in the torque converter / valve body etc. thats retained in the system. This may be an **** approach, but your transmission will live longer for it, especially if you race the vehicle.
Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (LIGHTNING)
He knows what he is talking about! I have a mechanic friend who said that he has seen quite a few cars that required repair after undergoing a "power flush." Change the filter and fluid and tell them to forget the machine. :yesnod: :)
Thread Starter
Melting Slicks
Joined: Jun 1999
Posts: 2,263
Likes: 48
From: NJ
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (LIGHTNING)
CHJ & Carpe,
if what you guys are saying is true, there should be a lot of gm cars on the road with bad tranny's, since all the gm dealers have been using the bg flush method for a number of years now...at least 5 yrs that i can remember.
if what you guys are saying is true, there should be a lot of gm cars on the road with bad tranny's, since all the gm dealers have been using the bg flush method for a number of years now...at least 5 yrs that i can remember.
Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (LIGHTNING)
The major problems develop with older cars that have not been serviced (filter changed). You should NOT have a problem with a new car, but why take the chance, especially if you are not under warrantee. :rolleyes:
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Re: Tranny Fluid Exchange/ Filter... & Dex-Cool Question (carpe dm)
DO NOT use a leak sealer in a LS1. Some coolant passages in the engine block are very small and can become blocked with a sealer.
I also would not recommend using a machine to flush. Just drain, flush with distilled water and re-fill using distilled water and dexi-cool. I did this, my old coolant was very clean.
One word of caution, turn drain plug ONLY 90 degrees and pull it out, if you turn more you will shear a pin and have to replace drain plug. Drain plug is on passenger side at bottom of radiator.
I also would not recommend using a machine to flush. Just drain, flush with distilled water and re-fill using distilled water and dexi-cool. I did this, my old coolant was very clean.
One word of caution, turn drain plug ONLY 90 degrees and pull it out, if you turn more you will shear a pin and have to replace drain plug. Drain plug is on passenger side at bottom of radiator.
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