rennat_2006

iTrader: (10)

Are 5/16" id hoses big enough for a 4l80e?

Tried to search and couldnt really get past the an adapter fittings for a 4l80e or what needs to be done for lines when converting a f body to a 4l80.

b0b

iTrader: (1)

They make a set of fittings for both new and old style 80s. The new style 80e requires the rear fitting to have a long snout out past the threads that goes into the transmission. Old 80s don't require the special fitting. The threads are 1/4 NPTSM. DO NOT get 1/4 NPT fittings and try to use them. Those are tapered pipe threads and the 80e does not have tapered threads. You will bust the case if you over tighten a tapered fitting into it. The threads in the case are Straight, 1/4 NPTSM. As for lines, 8an seems to be the norm

rennat_2006

iTrader: (10)

Thanks. I was already aware about the transmission side fittings and have already installed the correct ones.

So -8 is the recomended size for the trans cooler lines/hoses.

Can anyone confirm that a 98-02 camaro trans cooler built into radiator fittings are a 16mm thread for me? I need to order the fittings for that next

mrvedit

I have never before read of anyone using bigger than 6AN hoses (3/8"ID) for cooling lines, but I don't recall every 4L80E thread.

I think you will want to skip the stock radiator cooler, it is just a simple tube with a diameter of 5/16" or at most 3/8". Certainly not 1/2" which corresponds to 8-AN.
You really should be installing an aftermarket cooler and that is an absolute if you have a higher stall converter.

rennat_2006

iTrader: (10)

Good to know thank you

01ssreda4

iTrader: (96)

With cooler lines I say the bigger the better. Im running 1/2 lines on my car, even have 1/2 lines on my ATV oil cooler.

rennat_2006

iTrader: (10)

Anyone know what size thread the fittings are in the radiator?

mrvedit

I don't know as I don't have a Gen-4, but are you still determined to use the stock trans cooler?
IMHO, it is barely adequate for a stock engine and 4L60E, certainly not for a higher performance engine running through a 4L80E, especially not with an aftermarket converter.
Now some people use it in series with an aftermarket cooler; in that case there is absolutely no reason to go bigger than 6AN due to the constriction the stock cooler causes.
I know that 01ssreda4 has bypassed the stock cooler entirely.

You know, we are happy to help you with overall solutions and suggestions. Why not tell us more about your overall car, engine and trans plans.

01ssreda4

iTrader: (96)

Stock lines aren't big, about 5/16 or 3/8.

rennat_2006

iTrader: (10)

Customers 1966 chevelle
2004 lq4
-holley 302-2 oil pan
-ls1 intake/ls1 fuel rails/ls1 injectors
-slightly modified truck accessories
-truck manifolds with collectors cut off and chunk of 3" pipe welded on to position them where i wanted and o2 bungs welded in
-transdapt ls swap plates
-poly motor mounts
-tanks inc fuel injection tank with intank walbro 255
-vette fpr
-98-02 camaro radiator and fans
2004 4l80e
-transgo hd2 shift kit
-aftermarket torque converter, pretty sure just stock replacement came out of donor truck.
-poly trans mount on modified stock chevelle crossmember that has been moved back.
Rest of car
-aftermarket tubular upper and lower a arms
-full proforged steering rebuild kit
-grand cherokee steering box
-lowered 2" or so front and back
-bilstein shocks on all 4 corners
-98-02 camaro disc brakes front and rear
-correct bore master cylinder, 8" dual diaphram booster, correct prop valve, and line lock for brakes
-full cluster of custom spec'd speedhut gauges in carbon fiber gauge panel
-factory console shifter converted over to run 4l80e
-riddler wheels with 17's in front and 18's in rear
-battery moved to trunk behind pass rear tire

Going to put twin turbo setup together for it shortly after it is running/driving and owner has enjoyed it for a bit. It will get correct torque converter to match setup at that time and possibly a gear ratio change(3.07 currently)