Project: Mad Hatter aka Gen-V 5.3LT motor in a WhyJ - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 02-12-2019, 04:15 PM   #1 (permalink)
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Project: Mad Hatter aka Gen-V 5.3LT motor in a WhyJ

I figured I'd start a build thread on doing a Gen 5 swap since I hadn't been able to find much info at all on the Internets. Got a 5.3 out of a 2017 GMC, came with an 8l90 8 speed tranny (which is for sale if anyone wants it.) Starting with whats left of my 87 YJ that was sporting a 4.2L w/ HEI, weber, ect and a Peugeot 5 speed that is surprisingly tough.

I've had this jeep since high school and slowly up graded this over the years and now I've finally acquired my own shop at home so let the games begin.

Current rig specs -
-4.2L HEi/webber blah blah blah
-5 speed Peugeot
-NP231 short shaft
-Front HP D44 sprung over w/ 4" lift YJ springs, 5:38s all chromo, CTMs, Auburn E locker, Hydro assist ect
-Rear D60 sprung over XJ springs 5:38s, detroit, disk brakes
-39.5 Iroks on home brew beadlocks

Plans-
-Gen-V 5.3, stand alone harness and hot tune
-all new wiring harness, been chasing electrical gremlins since I bought this thing
-Turbo 400 tranny
-Either Hero or Atlas, leaning toward Hero
-no plans on the suspension but i'm sure i'll break down and back half it
-cage


Pics from college in Moab sprung under w/ waggy axles and spools -




The rig as of the late, poser pics





And its on, tear down and cage



Its gone



my first attempt at bending w/ my affordable bender



then broke the fu*k out of it



Fixed, new bracket and new 20 ton jack vs 8 ton



Dash and all the fu*kin wires gone

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Old 02-12-2019, 04:15 PM   #2 (permalink)
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put some bends in the spreaders cuz i kept banging my head on it

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Old 02-12-2019, 04:17 PM   #3 (permalink)
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now on to the power plant -

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Old 02-12-2019, 04:26 PM   #4 (permalink)
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So like i said not a whole whole lot of info available or my google foo is shit, probably a little column A, little column B. After a while on the phone I've come up with the parts list so far -

TCI Flex plate - https://www.summitracing.com/parts/tci-399756

Crankshaft adapter - https://www.ictbillet.com/ls-swap-to...-flywheel.html

standaloneharness.com is doing the harness cut down and his buddy if going to put a hot tune on the brain box. there is some really good info on this site and even more if you call and talk to them.

Wayne from Kwik performance is supposedly fixing to come out with a Gen-V power steering pump bracket that replaces the A/c condenser (since i dont need that crap) and can keep the vacuum pump to run the brakes and factory water pump instead of swapping for an LS WP.

Walbro 255 LPH fuel pump

Last edited by 1tonhammer; 02-26-2019 at 02:47 PM.
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Old 02-26-2019, 02:55 PM   #5 (permalink)
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after more consideration, went with the ICT Billet PS pump brackets - https://www.ictbillet.com/lt1-l83-al...uck-gen-v.html

it's about half the price of the kwik and should be a more simple install, basically replace the A/C compressor with a PS pump. still need to order a reservoir, I guess corvette PS pumps don't have one.

took a page out of the apline lizard book and coated the firewall inside and out with boom mat






needed some rock sliders, found the perfect size angle iron at the steel yard in the scrap pile, scored rock sliders for .75 a pound.

drilled and counter sunk



bent up some tube and added a step, really need a dimple die set...



took a flap wheel to the frame and ran out of weekend due to working on non jeep projects..


Last edited by 1tonhammer; 02-26-2019 at 02:59 PM.
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Old 03-03-2019, 06:09 AM   #6 (permalink)
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Talked to Ken at Stand Alone solutions, says to run a C6 vette gas pedal, its the shortest and is steel vs plastic so i could bend it or cut to fit the jeep.

gas pedal from corvette mods - https://www.corvettemods.com/C6-Corv...SABEgL1y_D_BwE

headers are wires from Speed engineering - https://www.speed-engineering.com/ls...c10-truck.html

dirty dingo universal LT motor mount - https://www.dirtydingo.com/shop/index.php?cPath=392_400

chopped the shock hoops off the front and re-used them for the rear, going to bend up new ones today. tied the cage into the frame. Hopefully picking up the transmission tomorrow...



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Old 03-07-2019, 11:43 AM   #7 (permalink)
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so you've got an L83 motor then? why not run the 8l90? I was looking at almost the same combo but would rather the 6l80 since it has a 32 spline output already.

--Sherpa
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Old 03-07-2019, 02:31 PM   #8 (permalink)
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Which computer does the GenV use?
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Old 03-07-2019, 02:34 PM   #9 (permalink)
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so you've got an L83 motor then? why not run the 8l90? I was looking at almost the same combo but would rather the 6l80 since it has a 32 spline output already.

--Sherpa
from the little i could find on it, the issues would be the shifter and keeping it from shifting like it would in the donor vehicle
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Old 03-07-2019, 04:59 PM   #10 (permalink)
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The 8l90 is 32spline output as well. the gen5 is e92 ecm. 8l90 is an external t87 tcm. There are a few options for shifters, you would want to utilize tap shift, but could also tune the shifts to your liking. Good idea to do a converter on the 8l90.

Following along, the gen 5 stuff makes good numbers. Are you planning to utilize the DOD?

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Old 03-08-2019, 08:17 AM   #11 (permalink)
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Originally Posted by gt1guy View Post
Which computer does the GenV use?
not exactly sure, I'm just using the one that came out of the donor truck. i'll have it back from the tuner next week and i can tell you more. Edit: ^ that guy knows

Last edited by 1tonhammer; 03-08-2019 at 08:18 AM.
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Old 03-08-2019, 08:34 AM   #12 (permalink)
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The 8l90 is 32spline output as well. the gen5 is e92 ecm. 8l90 is an external t87 tcm. There are a few options for shifters, you would want to utilize tap shift, but could also tune the shifts to your liking. Good idea to do a converter on the 8l90.

Following along, the gen 5 stuff makes good numbers. Are you planning to utilize the DOD?

-Scott
My plan was to sell the 8L90 to re coup some $$, i have a solid built TH400 already w/ flex plate for the L83
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Old 03-08-2019, 11:02 AM   #13 (permalink)
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Plan to highway drive it at all? Good find on those headers, might have to get a set.
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Old 03-09-2019, 03:40 AM   #14 (permalink)
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Plan to highway drive it at all? Good find on those headers, might have to get a set.
the guy tuning the computer is going to turn of the DOD, as far as delete goes all the kits i see include pulling the heads off and thats a no for me right now, i'll eventually probably get bored and do it when i do cam and valve springs ect.

don't plan on doing much hwy driving, more of a trailer queen.
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Old 03-13-2019, 07:57 AM   #15 (permalink)
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weekend update:

got the tranny bolted up and stab'd the motor, the dirty dingo brackets worked out damn near perfect, took some measurements and welded the mounts. clears the hood, barely

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Old 03-13-2019, 08:27 AM   #16 (permalink)
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then some major changes were made....

Scored a deal on a front D60



chopped the leaves and old D44 off and ordered link material



out with the old



broke out the ghetto fab bender and bent up some hoops for the airshocks or coilovers, whichever i decide, leaning towards airshocks because of price



Hoops mounted and threw some gussets on these, I'll probably add more tube once I locate the shock mounts

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Old 03-19-2019, 07:45 AM   #17 (permalink)
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Hacked all the brackets off the D60, got 5:38s and a Detroit. Ended up destroying the spindles getting them off so had to ebay some.

Scored some 18" BNIB Fox airshocks on FB for the cheap, this is mocked up without and w/ tires.

got my t case adapter today, should have the link material and engine wiring harness tomorrow and hopefully get major progress this coming weekend...



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Old 03-19-2019, 07:47 AM   #18 (permalink)
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Also got an astro steering box and sent to redneck ram to rebuild & drill and port for hydro assist
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Old 04-09-2019, 11:49 AM   #19 (permalink)
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progress has been slowed due to buying a new house, good news is the shop is way bigger so thats awesome, but now i need to get this thing back on its feet so i can move it.

Got the D60 done 5:38s and a Detroit, drilled out the knuckles and flipped the tie rod. Did a little rework on the shock mounts, tell me what you think about the mounts and the angles, first timer here. got about a 3rd of the stem out from the shock body so that should be about ride height-ish?



got a box of goodies finally from Barnes, shipping took 2 weeks but i think it was USPS' fault and then the box was all beat up and missing the track bar bracket, so still waiting on that...



now to the trans/tcase mount, the found this mount that would adapt the Th400 to the BW4401, but the mount is dead nuts in the center of the front output, so thinking about flipping the mount to the top side? has anyone done that, would it even matter and i could bend a hoop to protect the trans and X case




lastly, I bought a D60 disk brake kit for the rear ford D60 years back from some dude on here, but i never could figure out what studs to run, the factory ford studs aren't girthy enough and keep falling out wanted to try a different studs before i weld them to the back of the rotor...

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Old 04-12-2019, 03:06 PM   #20 (permalink)
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How much for the 8L90E?
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Old 04-16-2019, 08:08 AM   #21 (permalink)
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How much for the 8L90E?
its in the classifieds - https://www.pirate4x4.com/forum/engi...l90-trans.html
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Old 04-16-2019, 11:07 AM   #22 (permalink)
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Damn, that 8l is long. So you're thinking of not using the LT engine?
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Old 04-24-2019, 08:58 AM   #23 (permalink)
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Damn, that 8l is long. So you're thinking of not using the LT engine?
no the LT is in now just has a TH400 behind it
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Old 04-24-2019, 09:10 AM   #24 (permalink)
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got some pretty good work in on the 3 day weekend

got the 3 link where i want it, re did the shock mounts and had to make my own track bar bracket cuz I never did get the barnes one i ordered, also had to make the frame upper link mount because the barnes bracket was too big and right where the header collector is...



should have pretty salty droop travel



welded all the links and axle brackets and painted





bent up a tube to start the X case mount and ran out of time, if i can finish the X case mount and roll the tub for beliner i can start running wire and hopefully get ready to fire this thing

Last edited by 1tonhammer; 04-24-2019 at 09:16 AM.
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Old 04-30-2019, 03:44 PM   #25 (permalink)
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got all the links assembled and put everything back together to get ready to move the shop this weekend. i'm thinking this should be right height-ish. waiting on my nitrogen rig to juice the air shock and be on its own weight

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