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12-29-2015, 04:42 PM | #1 |
Registered User
Join Date: Dec 2010
Location: Dallas, TX
Posts: 160
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Re: 4L80E & TH400 Tech.
Cline, thanks for this thread, found it google searching for a few things on my 80E valve body rebuild-mod and it's absolute gold.
I have a question re: the AFL bore wear. How can you tell if it's bad? I don't think my 91 has ever been apart other than the fluid and filter I did at 78k. it has 93 on it now. Do you work at a local DFW transmission shop or are you "retired"?
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2010 Basalt Black Porsche Cayenne GTS - Daily driver 1991 2500 Suburban, Black - 454/80E tow monster, soon to go under the knife... Again. 1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac |
12-29-2015, 08:35 PM | #2 | ||
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 4L80E & TH400 Tech.
Quote:
Symptoms of AFL wear are....Wrong gear starts, Converter clutch slip/Fall out Hot, Codes P0757, P0894, P0730.....If it gets bad enough....Clutch Burn-Up. Quote:
If ya'll want to check the Bore physically, Remove the AFL spring, Move the AFL valve 3/16" from the bottom of the bore & wiggle the valve, Compare that to how much wiggle it has when at the bottom. It is hard to explain "Feel" & "technique".... I stopped working at Transmission shops long ago, I work at a specialty Performance shop here in Fort Worth, We specialize in TH400/TH350/700R4/4L60E/4L80E performance builds, Ring & Pinion installs, And LSX swaps. PM me for contact info. |
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12-29-2015, 10:24 PM | #3 | |
Registered User
Join Date: Dec 2010
Location: Dallas, TX
Posts: 160
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Re: 4L80E & TH400 Tech.
Quote:
Anyhow, if that gets it I'm going to be awesome, if not I'm going to need to get this thing completely gone through. I'll shoot you a PM.
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2010 Basalt Black Porsche Cayenne GTS - Daily driver 1991 2500 Suburban, Black - 454/80E tow monster, soon to go under the knife... Again. 1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac |
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