Eric's calling you out alex...heheh

the 4t80e is built much more heavily than the 4t665-hd from the factory. It is a much stronger transmission than our stock one.

4T80E > 4T65E HD
the 80e is way stronger since the reduction is all in the differential instead of the much weaker chain in the 65e


here's the output shafts....hrm which is which? lol


the stock 80e chain is over an inch wide


80e turbine shaft and the much larger sproket and support bearing


its just a tiny bit stronger

so were comparing the non supercharged tranny to the HD supercharged tranny right?

Supercharged wrote:

so were comparing the non supercharged tranny to the HD supercharged tranny right?

NO NO, the 'non supercharged' pre-'97 tranny is a 4T60E. The 'Supercharged' HD tranny ('97-up) is a 4T65E. They've got a totally different animal, the 4T80E.

that is a 4t80e dif and the 65e

97 and older got the 60e and some later cars (bonnies and the riv's, ultra's) had the 60ehd
98+ got the 4t65e and the sc cars got the 4t65eHD
the 4t80e was used behind the 4.5 and 4.9l v8's in the older caddy's and behind the aurora and N* V8's in the later cars.

a 99 gp towing capacity is 1000lbs
a 99 caddy.... 3000lbs

guess which car is also heavier and has more power in OEM trim

the 80e is the fwd equivalent of the 4l80e 1 ton rwd trans
its heaps stronger in stock trim...probably stronger than a 4000$ built 65ehd

Perhaps i missed it , but what kind of modification did you have to do to get the 80e in there? Seems like if i ever wanna upgrade the 4t60 the 80e is the way to go.

And now that i think about it , i hear about more Cadillacs needing engines than transmissions.

bingo

there's a bit on it earlier in the thread

basics
electrical

solid state NO relay for shift sol B reversal

97-99 80e trans (proper manifold pressure switch assmbly)

plumb in a press switch in the TCC relief passage or completly disable tcc in pcm file (as we have done-the junk trans will help me determine the tcc pressure switch workaround as the 80e doesnt have it and the 65e pcm is looking for it)

switch two terminals in the 65e pcm harness plug, also tap 80e second poer wire into the 65e connectors single 12v supply, leave tcc switch wire cut and left ungrounded.

now plug your oe 65e connector directly into the 80e connector (yes they are the same lol)

highly modify the 65e range switch for a pigtail and mating connectors to the oe harness. looks funky but works great

access to the gear ratio tables and other trans tables

mechanical

for riv's- two aurora axles (or just the inner tulips and shafts) bonnies and ultra's (G H C bodies) should be the same (dbl check)

for riv's the mount brackets that bolted to the 65ehd bolt right up to the 80e points (makes ya wonder whether gm loved the cost effectiveness of reusing the same part numbers as often as possible lol)

you can keep the shitty oe front motor mount but we chose to use neon rubber mounts and make new motor mounts down low and thereby giving full access to the belts al la w bodies

flexplate drilled to 80e 4 bolt pattern, purchace 4 special arp metric converter bolts twelve point ONLY! 6 pt wont let a socket clear the flexplate weight. (see pics)

drill the missing belhousing bolt hole in the middle front bellhousing boss of the 80e (right above the 3800 block starter boss)

small piece of angle iron drilled with 3 holes as the new engine to trans brace

two places on the trans case require it be ground for clearance as so far only PS headers have worked with the 80e and cleared the range selector shaft.

3800 modifications

the lower outter portion of the "bitch bolt" boss has to be cut off (you can still boltup to the 65e trans, but you can leave the bitch bolt in a few turns and remove/install the engine, kinda nice lol)

the 80e "bitch bolt" goes in from the drivers side towards the passenger side, and requires drilling and tapping for a grade 8 3/8thd bolt in the 3800 block at the centerline of the 80e bolt location (measurements are included in one of my pics)

the rear water jacket must be plugged with a 1/4npt plug and the kr sensor relocated to the upper block bolt hole of the oe 65e engine to diff brace (this hole is drilled and tapped to 1/4 npt and kr sensor threaded in

deekster_caddy wrote:

Supercharged wrote:

so were comparing the non supercharged tranny to the HD supercharged tranny right?

NO NO, the 'non supercharged' pre-'97 tranny is a 4T60E. The 'Supercharged' HD tranny ('97-up) is a 4T65E. They've got a totally different animal, the 4T80E.

okay i understand now, thats awesome...we can swap a better tranny in

the now even more modified PS headers and the new location of the now cable operated DMH cutout


and yes he drives it

some new pics!
picked up a brand new delphi radiator for 190$ (the dexsludge and 11years old are why the old one is nolonger with us lol)

here's the downpipe cutout ready to weld, to do this required moving the curved section of the original PS headers to the Y piece for enough room for a nicer angle. the flanges are welded on now with the two holes up near the body and the single bolt (of the 3 bolt header flanges) is at the bottom.

here it is fully welded, with the cutout bolted on there's only 1/4" that hangs below the lowest portion of the subframe...all in all we gained clearance... once its all back in i can finish the rest of the 3" exhaust (we had to order two more 3" 180* bends though...up to just under 300$ in the exhaust mods this time lol.

cant wait to hear it, is this just you or do you have the luxury of having buddies that are more than happy to help you out....im lucky to have those friends that want to help with awesome projects like who wouldnt want to be apart of a whippled l67 RIV

its me and eric, sometimes Al if it werent for me it probably wouldnt have gotten so far out of hand!

wait till ya see what we did to the old front motor mount area

this is the new front motor mount...i finally finsihed weldoing it to the subframe

oooops

much more room! youll note the relocated fuse box now that the ac is completly gone...

That lower front engine mount is AWESOME

HMMM what about grinding off all that slag

palermocorey90 wrote:

HMMM what about grinding off all that slag

lol some spots look bad but i didnt use stick, just my mig...its a bitch welding to spotwelded metal with that particular primer under/inbetween the sheets i was welding to, the lower mount is dbl and tripple pass in the top and bottom stress points, i just clean the surface of the welds i'm lazy like that lol (its not my car its only eric's hahah!

motor goes in (again) for the final time today!

motors in for the final time (again lol) the DP cutout is perfect much like i expected...i got some more pics of the front mount fer ya


see its in!
plenty left to do!

enjoy the new pics
how the 80e pan looks next to the motor and G body subframe, also the DP cutout can be seen, the lowest part of the cutout is ~3/8ths of an inch below the subframe, the same height as the button head bolts going upward through the subframe for the rear mount/rack mount, this bugger cant get hit by a speed bump if he tried! this things a 4x4 lol the crappy 3 bolt flange was twisted for easier upper bolt install/tightening...i'm gonna do this to all of em now lol

3" mandrel bent all the way around the underseat battery tray and through the rear trailing arm suspension tunnel

a view inside the high flow Y (i dun didit good ) that will bump into two 3" flowmaster deltaflows and out the back with some stealth tucked in 3" turndowns

the carpeting was reinstalled and trimmed, not too shabby

Got filter? here's the plenum getting ready to be reworked for some toys (shhhhhh!), the 90mm TB, 104mm 99+MAF housing, and a small K&N

WTF???!

What do we have HERE?!?

yes two stages

BTW where the hell is alex? hey bud ya getting ready fer spring right?

high flow Y

Flowmaster and Y

Flowmaster fitment

James, did you do that whole exhaust all yourself? Um wanna make me a 3"- 3"x2 Y pipe one of these days?

ok im calling out Tony smooth

palermocorey90 wrote:

ok im calling out Tony smooth

Sure...right after my turbo and 4t80e swap.

turtleman wrote:

James, did you do that whole exhaust all yourself? Um wanna make me a 3"- 3"x2 Y pipe one of these days?

yup dynomax aluminized- 1 4ft piece of 3" straight, and 4 3" 180* u bends (part# 42323)
1 U for the Y, 1 U used for the battery box deviation, 1 U for the muffler entry's, and the last U used for two turndowns and from the remnants the small pie slices (~5*) to kickup the muffler entry's closer to the body.

only if ya bring it here lol

TonySmooth89 wrote:

palermocorey90 wrote:

ok im calling out Tony smooth

Sure...right after my turbo and 4t80e swap.

the primary pipe

and the solenoids being mounted

HANOVER PARK