WILL A D20 T/C WORK WITH OFFSET D44 REAR?

[RudyC]

I think I can get a TH400 from a J truck with a dana20 attached. I have the Q trac and the off set rear D44. Will it work ok even though the driveshaft will be at an angle since thd D20 rear output is in the middle.

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AKA RUDY79.
1979 WAGONEER, 360, TH400, Q- TRAC. 3" ADD A LEAFS, 31" MUD T/A'S (PEP BOYS CLONES).
" Go farther, it only breaks on the street"

[Dave _S]

I looked into this once. I was told that the that angles aren't too bad and that other than some extra vibration at 3000 rpm and above it works. I was also told that you have to shorten the front and rear driveshafts as the Dana 20 is wider than a QT. This is strictly hearsay. I haven't made this conversion myself. You may also want to look at a Dana 20 equipped rig. The shifter is on the passenger side of the driveshaft tunnel. Very inconvenient.

You may also want to consider a big bore (4" intermediate shaft) Dana 18. You can use the factory TH400 to Dana 20 adapter and you don't have the offset diff problem.

[RudyC]

Thanks Dave.
Did you get your diff. gears changed?

[River Beast]

RudyC,

My friend Jesse has a 72 Waggie with a Dana 44 (5 lug) offset rear. Everything is apparently as it was purshased when new...some were put out that way... except the lift, headers and little things. So the answer is yes... it will work. I can't say much on the driveline lengths, sorry. I can tell you that he has done a SOA (Dana 27 or 30 front axle) with 2.5" AAL's and runs the stock shafts with no mods to date and it's been about 2 years now...

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Todd
78 Wagoneer, "River Beast"
360/TH400/QT
Dana 44's locked w/ 4.89's
39.50x15x15 Super Swamper TSL's
7" SOA in front-7" Rear Shackle Inversion Mods
4" Skyjacker Softride
3" Trailmaster Bodylift
My FSJ site: http://www.geocities.com/~spazz4life (http://www.geocities.com/~spazz4life)
My E-mail: spazz4life@yahoo.com
"If you can't stop...SMILE as you go under!"

'93 3/4 ton 4x4 Suburban...a.k.a. "FSJ Hauler"

[This message has been edited by River Beast (edited October 27, 2000).]

[scotty]

a friend of mine swapped a t18/dana 20 in place of a QT and still runs the offset rear end.he doesnt really have any driveline vibes.actually,you have no choice in running the offset rear,unless youre gonna swap gas tanks.the centered diffs driveshaft will hit your stock tank.my friend east u joints,but im pretty sure that this is because his yoke is worn,not really a problem with the angle.

one thing to consider,if your QT has low range,youre losing .58 of low range-2.03 dana 20 vs 2.61 QT. dont get me wrong,im all for cast iron,gear drive and making a twin stick shifter for a d20,and you can get aftermarket 3.15 gears for a dana 20,or use bronco gears to bump it up to 2.49. the QT,tho,isnt a bad case(for being aluminum and chain driven,and not having a straight thru output),the bronco gers are scarce,and aftermarket low range gears are expensinve,so its maybe worth keepin,depending on your uses and 'wheelin style. im about to swap a t18/d20 in place of my 904/d300. i hate giving up the low range,and losing the circular mounting pattern(klune v crawler box bolts right in there with no funky adapter http://www.ifsja.org/ubb/biggrin.gif )to the dana 20 "texas" pattern,but,the 6.39 granny makes up for the low loss,and the reality is that ill prolly never have $800 to spend on a crawler box anyway http://www.ifsja.org/ubb/frown.gif so the swap is still well worth it for me-better crawl ratio and no more "water in the auto ruining my weekend at haspin" blues!



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scott
85 grand wagoneer
258 with motorcraft 2bbl/904/twin stick dana 300/dana 44/welded amc 20
38x15.5 gumbo mudders
snorkel/dual batteries/onboard air/"custom" convertable
3 inch body lift/mostly stock suspension/"modified" fender openings
custom front/rear bumpers and brushgaurd

T18/dana 20 swap very soon
searching for dana 18 to replace the 20...

[porkchop]

I just switched mine from the D20 to the QT and I switched rear ends in the process. The axle I took out already had a off set. Not as much as the QT D44, but it does have an off set already. The difference between the 2 is about three to four inches.

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'67/'79 Wagoneer mix
"Old Timer"
Body of a 33 year old
Heart and legs of a 21 year old.
Spirit of a 1 year old.
360,TH400,QT,D44's F&R
SOA 32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."

[KENALL]

well with the SOA on my 66 wag, the vibs from the d20 were terrible. after i swapped in the QT the vibes went away. but i kept my OE 'slight' offset rear d44, and not the OE QT rear 44 found in 74-79 wags...

my driveshaft is now offset to the P side now, but not as much as with the d20. rear driveling angles are better, and the less vibes i have are a result of that...

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Ken
1966 Super Wagoneer
'The Predecessor'

http://home.earthlink.net/~kenns9/index.html

[RudyC]

Porkchop! i am so glad you are better. heck who am i to argue with a Marine. i'll keep the QT.
just wondering why you swiched to the QT from the 20?

Kenall what do you think caused the vibration with the d20?

i was mostly interested since you can install the low gearing kit and, well a cast iron case is a cast iron case.

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AKA RUDY79.
1979 WAGONEER, 360, TH400, Q- TRAC. 3" ADD A LEAFS, 31" MUD T/A'S (PEP BOYS CLONES).
" Go farther, it only breaks on the street"

[KENALL]

i switched to the QT cuz of the OD kit, the offset design and the lower lo-range.

my vibrations were caused by the hi operating angles of the ujoints due to the lift...

if certain noises are gone after lowering the angles the driveline rotates at, its possible that was the problem...


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Ken
1966 Super Wagoneer
'The Predecessor'

http://home.earthlink.net/~kenns9/index.html

[scotty]

if youre not gonna use it,could you be talked into getting it and sending me the adapter and tailshaft?if so,how much would it take to make it worth your while? i have a friend that would prolly be real interested.ive got a low range QT here that could prolly be used for tradin purposes,if anyone needs it.



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scott
85 grand wagoneer
258 with motorcraft 2bbl/904/twin stick dana 300/dana 44/welded amc 20
38x15.5 gumbo mudders
snorkel/dual batteries/onboard air/"custom" convertable
3 inch body lift/mostly stock suspension/"modified" fender openings
custom front/rear bumpers and brushgaurd

T18/dana 20 swap very soon
searching for dana 18 to replace the 20...

[porkchop]

Thanks Rudy I feel better. I switched to the QT because I wanted an automatic and the TH400 I got my hands on was attached to the QT so I just put the whole running gear in mine (that was a challenge). My chain is slipping bad now. This is a good reason to tell the wife I need to get the part time kit http://www.ifsja.org/ubb/biggrin.gif I am still trying to figure out how to get my D20 back in there though.

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'67/'79 Wagoneer mix
"Old Timer"
Body of a 33 year old
Heart and legs of a 21 year old.
Spirit of a 1 year old.
360,TH400,QT,D44's F&R
SOA 32X11.50's

"I regret that I have but only one paycheck to give to my Jeep."