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  #1  
Old 11-26-2007, 01:23 AM
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wickedwagon767 wickedwagon767 is offline
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If you're abusing a Dana20,stop on by

I'm interested in Dana20 stories. Blow ups and......not. I want to see how many of you out there might have surviving Dana20's under modified FSJ's. As far as I know the only strength upgrades available for them are the Advance Adapters adapter(Th400 unit) and 32-sline output shaft upgrade, Tri County Gear's case girdle, Novak's roller bearing intermediate shaft and the Teraflex 3.15:1 low range gearset. Any of you running 33's and up with regularly used, at least mildly modified FSJ's (lockers,mild-to-wild power) chime in on this. Let me know if the case is stock or modified

Last edited by wickedwagon767 : 11-26-2007 at 02:04 AM.
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  #2  
Old 11-26-2007, 01:58 AM
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Dmntxn77 Dmntxn77 is offline
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I never had any problems with it when I was running 35"s...

I will let you know how it holds up with my 1 tons and 38.5" though..
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  #3  
Old 11-26-2007, 02:03 AM
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wickedwagon767 wickedwagon767 is offline
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Quote:
Originally Posted by Dmntxn77
I never had any problems with it when I was running 35"s...

I will let you know how it holds up with my 1 tons and 38.5" though..



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  #4  
Old 11-26-2007, 08:20 AM
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Stuka Stuka is offline
 
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Scotty probably beats on D20's the most. I think he has broken two. Thats with a lot of throttle running a 258, T18a, and 38's with 4.10 gears. I never broke mine, but I only ran 33's.
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1981 J10 AMC 258 with TFI and Weber 32/36 DGEV Carb with a BJ's Aluminum Radiator, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 TSL's, BJ's Offroad Rear Bumper.

1975 Cherokee *Sold*
1989 XJ Limited *Sold*
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  #5  
Old 11-26-2007, 08:34 AM
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I have the 32 spline output on mine and it is doing fine for a 34 year old case with won tons and 38.5 swampers. (no lockers Stuka! )

Ref video:
http://s7.photobucket.com/albums/y26...lloween059.flv
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"Brutus" '74 J10 360/T18/D20/Front D60 Pro Rock & ARB/2" shave, ARB, 15 bolt FF Rear/ 4.56 Gears/38.5 x 16 TSL
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Current Homepage Status: RUNNING
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  #6  
Old 11-26-2007, 08:56 AM
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Gambler68 Gambler68 is offline
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Apparently the weak link is the STOCK TH400->D20 adaptor, that's all I've seen on weakness.
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  #7  
Old 11-26-2007, 09:23 AM
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orangecherokee orangecherokee is offline
 
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Sheared the output shaft under a stock 360, t18a and bald a$$ 35s
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I would think boxing would limit the amount the frame could flex over obstacles which I think IMO would be a bad thing. I would think you would want all the articulation possible.
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  #8  
Old 11-26-2007, 11:24 AM
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wickedwagon767 wickedwagon767 is offline
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Quote:
Originally Posted by BRUTUS
I have the 32 spline output on mine and it is doing fine for a 34 year old case with won tons and 38.5 swampers. (no lockers Stuka! )

Ref video:
http://s7.photobucket.com/albums/y26...lloween059.flv

nice clip
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  #9  
Old 11-26-2007, 02:20 PM
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Stuka Stuka is offline
 
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Quote:
Originally Posted by BRUTUS
I have the 32 spline output on mine and it is doing fine for a 34 year old case with won tons and 38.5 swampers. (no lockers Stuka! )

LMAO!
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1981 J10 AMC 258 with TFI and Weber 32/36 DGEV Carb with a BJ's Aluminum Radiator, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 TSL's, BJ's Offroad Rear Bumper.

1975 Cherokee *Sold*
1989 XJ Limited *Sold*
2005 KJ Limited 3.7, 42RLE, NP242
2008 JK 3.8, 6sp, NP241, 2.5", 33's, 4.56's
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  #10  
Old 11-26-2007, 07:47 PM
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bigun bigun is offline
 
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No problems with the Dana 20, but we did break the bull gear on Crom in Ouray!
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congrats...that's the first post on here I have absolutely no effing clue how to comment on.


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  #11  
Old 11-29-2007, 06:35 AM
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scotty scotty is offline
 
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Quote:
Originally Posted by Stuka
Scotty probably beats on D20's the most. I think he has broken two. Thats with a lot of throttle running a 258, T18a, and 38's with 4.10 gears. I never broke mine, but I only ran 33's.

actually,ive only broken 1 dana 20(knocking on wood desk ) and i have 4.56 gears. the rest is pretty accurate,tho

i have broken no les than 5 spicer 18s,but since swappin in the d20 ive only broken 1 output shaft in all the years ive been beating on it in my grand wag,and in my scout II.

the scout runs a very torquey 345,a close ratio t19,and 4.10s in the same axle i run in the jeep(10 and 14 bolt). wheelin it is alittle different since i have to use brute torque to make up for the lack of gears. putting my foot on the floor spins the tires very quickly,wich helps in alot of places in our muddy,rutted trails. been 3 years now and still on the same d20 i put in with the t19 when i put it together.

the d20 i broke in the GW was climbing a hill with a large ledge cutting across it,created by some tree roots. i was revving the 258 up to about 3000 rpm,then side-steping the clutch trying to bump the rear tires over the ledge. a loud clank and the rear wheels were no longer spinning. i peeked under and saw the front of the driveshaft on the groud. i thot id broken a u joint,but after backing down to the bottom of the hill a closer inspection revealed the yoke and half the output shaft still attached to the u joint and driveshaft

the d20 is far from bulletproof,but IMO alot of folks dont give them near enuff credit. as hard as i am on them in my 2 trail rigs i think they hold up very well,for what they are. the GW will eventually get a 203/205 doubler,but i have no plans to ever change the d20 out of the scout.
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85 grand wagoneer
258/t18/d20/10 bolt/14 bolt
38" TSL SXs
chopped,bobbed and caged

http://nightcrawlers4wd.20megsfree.com/index.html\

http://mytrailrigs4x4.20megsfree.com/photo.html\

Last edited by scotty : 12-02-2007 at 07:23 AM.
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  #12  
Old 12-01-2007, 12:20 PM
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wickedwagon767 wickedwagon767 is offline
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Quote:
Originally Posted by scotty
actually,ive only broken 1 dana 20(knocking on wood desk ) and i have 4.56 gears. the rest is pretty accurate,tho

i have broken no les than 5 spicer 18s,but since swappin in the d20 ive only broken 1 output shaft in all the years ive been beating on it in my grand wag,and in my scout II.

the scout runs a very torquey 345,a close ratio t19,and 4.10s in the same axle i run in the jeep(10 and 14 bolt). wheelin it is alittle different since i have to use brute torque to make up for the lack of gears. putting my foot on the floor spins the tires very quickly,wich helps in alot of places in our muddy,rutted trails. been 3 years now and still on the same d20 i put in with the t19 when i put it together.

the d20 i broke in the GW was climbing a hill with a large ledge cutting across it,created by some tree roots. i was revving the 258 up to about 3000 rpm,then side-steeping the clutch trying to bump the rear tires obve the ledge. a loud clank and the rear wheels were no longer spinning. i peeked under and saw the front of the driveshaft on the groud. i thot id broken a u joint,but after backing down to the bottom of the hill a closer inspection revealed the yoke and half the output shaft still attached to the u joint and driveshaft

the d20 is far from bulletproof,but IMO alot of folks dont give them near enuff credit as hard as i am on them in my 2 trail rigs i think they hold up well,for what they are. the GW will eventually get a 203/205 doubler,but i have no plans to ever change the d20 out of the scout.

You get an A+ Scotty

good info
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  #13  
Old 12-01-2007, 12:25 PM
Ristow Ristow is offline
 
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Quote:
Originally Posted by BRUTUS

so watcha got under the hood o' ol brutus...a 5 horse Briggs?
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  #14  
Old 12-02-2007, 06:16 AM
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scotty scotty is offline
 
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Quote:
Originally Posted by wickedwagon767
You get an A+ Scotty

good info

thanks

re reading it,i forgot to mention both my rigs run 38" tires. 38x15.5 TSL SXs on the GW,and 38.5x15 hawgs on the scout.
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85 grand wagoneer
258/t18/d20/10 bolt/14 bolt
38" TSL SXs
chopped,bobbed and caged

http://nightcrawlers4wd.20megsfree.com/index.html\

http://mytrailrigs4x4.20megsfree.com/photo.html\
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  #15  
Old 12-02-2007, 11:31 AM
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wickedwagon767 wickedwagon767 is offline
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Quote:
Originally Posted by orangecherokee
Sheared the output shaft under a stock 360, t18a and bald a$$ 35s

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  #16  
Old 12-02-2007, 11:40 AM
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wickedwagon767 wickedwagon767 is offline
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Quote:
Originally Posted by scotty
thanks

re reading it,i forgot to mention both my rigs run 38" tires. 38x15.5 TSL SXs on the GW,and 38.5x15 hawgs on the scout.

Good to know. I'll be running 36's until the Dana44's explode or until I get my 1-tons in early '08. I'm going to be running a healthy AMCV8 also, and I do have a lead foot,but I know when to keep my foot out .

I'll step up to bigger swampuhs with the 1-tons
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