Drivetrain Swap Questions

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11-02-2003, 08:35 PM
Tigger

Drivetrain Swap Questions

Swapping in a 360, T18a, D20 from a 77 Cherokee into a 76 Cherokee that has a 401, TH400, QT. I know I will need the clutch pedal, and linkage etc from the 77. But I think the rest is a direct bolt in or am I missing anything?

Secondly the 401 is going to be rebuilt and put back in the 76 mated to the T18a, what will I need to do to the 401 to make it ok with the manual trans? I know I will not need the flex plate but also the 401 is externally balanced right? How do I go about making that work?
11-03-2003, 06:24 AM
pyagid

I don't think you are missing anything externally the motors are identicle. Maybe the floor plate for the shifter to go through and make sure the cross members are not different.

When you are ready to put the 401 back in you are going to need a flywheel and pilot bushing and you should be all set
11-03-2003, 07:19 AM
jeepsr4ever

you may also need some aspirin and a 6 pack of beer and possibly a cigar for the victory dance
11-03-2003, 10:05 AM
Tigger

Oh I have plenty of asprin, and there will be some heavy whiskey drinking (don't care for beer) after the beast roars to life as well as cigars.
11-03-2003, 12:09 PM
Tigger

Them fellas over on IFSJA say I need the D20 driveshafts also, are the QT ones that different from the D20's? I will have them so its not really an issue just curious.
11-03-2003, 12:17 PM
jeepsr4ever

the front yoke is different, but you may be able to switch yokes if they were 10 spline and your 20 is 10 spline! you got options brother!
11-03-2003, 01:28 PM
Tigger

What about the front axle? Will the 76 with a QT have the lock out hubs or do I need to swap D44's also?

Eventually I want to upgrade the D20 outputs to the larger ones that the br**co guys are running.
11-03-2003, 04:43 PM
jeepsr4ever

the front will have full time but you can just take the guts from the other hubs and make it part time
11-03-2003, 09:07 PM
Tigger

MC never messed with anything like that before I may need a walk through, and then do it and take lots of pics for the tech section.

The guys at ISFJA have me all confused now so I have the following to ask:

1) What is the difference in offset on the rear D44 axle with a D20 to a QT rig?

2) Flexplate/Flywheel Same thing or different?
11-03-2003, 09:14 PM
pyagid

Quote:

Originally Posted by Tigger

MC never messed with anything like that before I may need a walk through, and then do it and take lots of pics for the tech section.

The guys at ISFJA have me all confused now so I have the following to ask:

1) What is the difference in offset on the rear D44 axle with a D20 to a QT rig?

2) Flexplate/Flywheel Same thing or different?

D44 with a D20 is center diff driveshaft comes out of top center of transfercase
D44 with a QT is offset. I believe the drive shaft comes off the Right side of the transfer case

Flexplate is for an automatic transmission and usauall pretty thin. Attaches the motor to the torque converter with bolts

Flywheel is thicker and heavier attaches to engine with bolts and to transmission throught the input shaft and clutch.
11-03-2003, 09:20 PM
pyagid

QT transfer case from rear yoke is on right
http://www.jeeptech.com/xfer/bw13393.jpg

D20 transfercase Yoke is center or on left side
http://www.jeeptech.com/xfer/d20b.jpg

Not neccesarily Jeeps

Flexplate
http://www.campbellenterprises.com/images/flexplate.jpg

Flywheel
http://www.g-speed.com/pbh/cm-flywheel-back.jpg
11-03-2003, 09:48 PM
jeepsr4ever

Hey Mudrat found out how to post pics........I got some hemi pics Mud
11-03-2003, 09:56 PM
pyagid

Quote:

Originally Posted by jeepsr4ever

Hey Mudrat found out how to post pics........I got some hemi pics Mud

:?: :?: :?: :smoker: :?: :dontknow:
11-03-2003, 09:58 PM
jeepsr4ever

Now hold on there! these are for Mud cause he has a hemi dodge, on the flipside they arent as cool as some of the AMC V8 engine pics i have
11-03-2003, 10:00 PM
pyagid

Quote:

Originally Posted by jeepsr4ever

Now hold on there! these are for Mud cause he has a hemi dodge, on the flipside they arent as cool as some of the AMC V8 engine pics i have

I was just curious to what mud has to do with the thread or even a hemi for that matter :?: :roll: :wink:
11-03-2003, 10:02 PM
jeepsr4ever

OK Im Busted!
11-03-2003, 10:21 PM
Tigger

ok it makes sense now.. when I worked in the transmission shop many moons ago we call both a flywheel, now I know the difference.

My other quesiton was regarding the offset in the pumpkin on the rear D44. Trying to figure out if I will be doing an axle swap also.
11-03-2003, 10:23 PM
jeepsr4ever

axle swap............yup at least the rear, the front ......hub change if the gears are right
11-04-2003, 06:16 AM
fuzz401

if you are going to run a th-400 i would spend the money for a sfi billit flexplate the factory flex plate do not last long with and power to them
11-04-2003, 09:40 AM
Tigger

Quote:

Originally Posted by fuzz401

if you are going to run a th-400 i would spend the money for a sfi billit flexplate the factory flex plate do not last long with and power to them

Nope dumping that automatic crap!
11-04-2003, 10:25 AM
fuzz401

never find a better tranny then the th-400 a lot easer on the drive train too
11-04-2003, 11:17 AM
Tigger

Quote:

Originally Posted by fuzz401

never find a better tranny then the th-400 a lot easer on the drive train too

I don't doubt that but I am a big fan of manual transmissions. I am light on the skinny pedal until I need to hammer it.
11-04-2003, 11:46 AM
AlaskaJeepR

How much are those billet flexplates?
11-04-2003, 11:49 AM
fuzz401

i paid about 250.00 for mine 1/4" steel and was drilled for a th-400 and 727 it was a mondella flexplate