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  #21  
Old 01-08-2008, 03:00 PM
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You can always flip the D300 to match the front axle output.

Stak's new case will run around $600, and as far as I know they are marketing them yet. The new case is nice, cuz they are making 3 versions, a flipped case, a standard case, and a narrow case for use in early Broncos that have a narrow frame.
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  #22  
Old 04-05-2008, 09:47 AM
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The J10 I just bought has a twin sticked Dana 300 in it. This may be the dumbest question ever, but even with the twin sticks the transmission (727) needs to be in Neutral before shifting the transfer case, right?
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  #23  
Old 09-01-2008, 05:56 AM
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Been talking about this for a while but getting close to getting it done now.

Question: Those of you with the TH400/D300 combo. I know you say the case will sit almost flat. If i go with the NOVAK kit ,is that all i need or will i need a seperate clocking ring also?

Tired of tripping over this D300 in my shop
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  #24  
Old 09-03-2008, 09:11 AM
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ive been working feeverishly for the last 6 moths swapping a new drivetrain under my fsj...i kinda planned it all around the d 300. i went with a doubler and 203, 700r4 in front of that, and finally said goodbye to the 401 for a 350. the case is nice and small and tucks up into the jeep body far better than the quadratrac. ill post a buildup thread someday.
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  #25  
Old 09-03-2008, 11:29 AM
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I dont know about the novak adapter(though my thoughts on the adapter is it should come with at least 3 different sets of holes drilled for different angles) i used a factory np style adapter and it went up in there nice and flat
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  #26  
Old 09-03-2008, 12:04 PM
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I'm seriusly considering swapping my 208 for a flipped, twin sticked, low geared, heavy output shafted 300. It sounds like exactly what I need.
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  #27  
Old 01-09-2009, 07:09 PM
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300 or doubler...choices choices...
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  #28  
Old 05-14-2009, 09:30 AM
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Ok, my question is what swaps.

I can get a Chevy 3.8 V-6 with a T-4 and it had a 300 behind it. Can I put an NP208 in place and put it into a drivers drop rig?
Will I have to change anything to make this work?
I have the 208, and no funds for a 300. This would be run in a Willys and not see but light wheeling.
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  #29  
Old 05-14-2009, 10:00 AM
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You can run a D300 flat behind a TH400 but it comes close the tranny (too close for my taste). You can clock it down some and still have it be above the frame rails. I have mine mounted just about flat and I have something like 2"+ from the bottom of the D300 to the bottom of the frame. I have to pull it out and clock it down some.
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Last edited by jeeping1974 : 05-14-2009 at 10:05 AM.
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  #30  
Old 05-14-2009, 10:01 AM
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Quote:
Originally Posted by jaber
Ok, my question is what swaps.

I can get a Chevy 3.8 V-6 with a T-4 and it had a 300 behind it. Can I put an NP208 in place and put it into a drivers drop rig?
Will I have to change anything to make this work?
I have the 208, and no funds for a 300. This would be run in a Willys and not see but light wheeling.

You will have to either swap the output shaft on the T-4 or the input on the 208 if they are not the same spline count. The mounting holes will be close enough where you can get 5 out of the 6 and still be safe.
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  #31  
Old 05-14-2009, 10:05 AM
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Quote:
Originally Posted by misfittom138
I'm seriusly considering swapping my 208 for a flipped, twin sticked, low geared, heavy output shafted 300. It sounds like exactly what I need.

I wouldn't install 4:1 gears into the D300 with it going in a FSJ unless you plan on cutting out some weight. In a wrangler, I would do it because of the weight. Once you install a lower gearing in the t-case, the t-case will take more of the stress from the axles. In a light weight rig, the chances of you breaking something is unlikely, but not impossible. In a FSJ, you could strip out a get set or worse. I would stick to just the twin stick, HD outputs and clocking ring. Thats what I did in my rig and went with 1350 non-CV yokes all around.
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  #32  
Old 05-14-2009, 10:06 AM
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Quote:
Originally Posted by quikclimber
ive been working feeverishly for the last 6 moths swapping a new drivetrain under my fsj...i kinda planned it all around the d 300. i went with a doubler and 203, 700r4 in front of that, and finally said goodbye to the 401 for a 350. the case is nice and small and tucks up into the jeep body far better than the quadratrac. ill post a buildup thread someday.

The D300 is also 30 pounds lighter that a QT case.
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  #33  
Old 05-14-2009, 10:07 AM
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Quote:
Originally Posted by krek
The J10 I just bought has a twin sticked Dana 300 in it. This may be the dumbest question ever, but even with the twin sticks the transmission (727) needs to be in Neutral before shifting the transfer case, right?

Yes.
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  #34  
Old 05-14-2009, 10:17 AM
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Quote:
Originally Posted by jeeping1974
I wouldn't install 4:1 gears into the D300 with it going in a FSJ unless you plan on cutting out some weight. In a wrangler, I would do it because of the weight. Once you install a lower gearing in the t-case, the t-case will take more of the stress from the axles. In a light weight rig, the chances of you breaking something is unlikely, but not impossible. In a FSJ, you could strip out a get set or worse. I would stick to just the twin stick, HD outputs and clocking ring. Thats what I did in my rig and went with 1350 non-CV yokes all around.





FYI I am running 4:1 in my cherokee chief with the 4bt after stripping out the stock small gear in low range pulling a trailer up to the ranch. I would put the jb conversions lomax 4:1 gears up against the stock dana 300 gears. I have had several stock dana gears crack on customers and then mine cracked with absolutely no abuse just let loose while pulling a trailer. and when you disassemble the 300 you can see why the cast gears are recessed the jb gears are imho a lot stronger so far so good 3 years a healthy 401, Now a 4bta, and a fair amount of dirt road, steep grade trailer tugging and lots o miles and so far so good.

My buddy is running a TPI 350hp cheby 350, a NV4500, Klune and a D300 with 4:1 and 32 spline outputs in a Toyota 4 runner sporting 4 links, full exocage, Corp 14 and Dana 60 on 46's tipping the scales a 5300 lbs Id suspect that if ever a D300 were going to break that'd probably be the one especially since it's been through little sluice just about every third weekend through the last three summers.
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  #35  
Old 05-14-2009, 11:16 AM
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You guys have had some luck then. (edit ->) That is impressive actually. (<- edit) I have seen local guys wheeling with 4:1 kits in their D300s and have the gears let go. It could be the kit they got was not up to par. I do know that JB's kit is really beefy, maybe none of them were running it though.
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Last edited by jeeping1974 : 05-14-2009 at 11:19 AM.
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  #36  
Old 05-14-2009, 11:26 AM
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Quote:
Originally Posted by jeeping1974
You guys have had some luck then. (edit ->) That is impressive actually. (<- edit) I have seen local guys wheeling with 4:1 kits in their D300s and have the gears let go. It could be the kit they got was not up to par. I do know that JB's kit is really beefy, maybe none of them were running it though.


I won't EVER RUN NOR RECOMMEND to anyone that they run Teralow gears EVER AGAIN.

I know i stripped out my teralows doing nothing strainuous 33's T-18. Absolutely stripped out and blew apart. no warning Garbage and after looking at them i can definatley call their 4:1 gears IMHO absolute CRAP....................I was running stock dana 300 outputs i figured they would twist and break before the gears and i was running 1310 u joints both of which should have popped LONG before the gears stripped... when the gears strip they usually break, lodge pieces of themselves between the case and the gear and then crack the case.

I know of 8 other guys locally who also had their tera's either in Dana 20's or in dana 300's strip out like mine did. Cheap crap. The Lomax gears were side by side a defiante improvement in the design.

I shocked when my stock dana gear cracked. the Tera gears though thicker than stock were not a huge improvement the mettalugy does not look as high a quality as the jb stuff obviously they proved to me their inferiority.

I honestly think Mike should have stepped up to an Atlas by now
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Last edited by dusty : 05-14-2009 at 01:11 PM.
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  #37  
Old 08-01-2009, 10:30 PM
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TH-400 atypical output shaft compatabilities

Quote:
Originally Posted by jeeping1974
for bolting one up to a TH400 you will need a TH400/208 adaptor housing and the output shaft out of the same TH400. get the 32 spline input gear and the clocking ring from JB Conversions. their input shafts fit perfectly onto my TH400.

Hey guys! New poster here just got my first FSJ toy project started! I have a question, I have a TH400/454 out of an RV that I'm swapping into my 88 waggie. The thing is, this thing came with a drum brake E-brake on the tailshaft instead of the standard 32 spline slip yoke, does anyone know if it the same length output shaft as the more typical setup? How are these shafts measured? see pic to see what I mean, it's a wierd setup! (apologies if it does not upload, dumb FNG here!)
Also, Has anyone else done a big block swap? What would you recommend for engine mounts, solid or rubber? Have been advised solid mounts shake too much and can cause fatigue cracks in frame welds. Any other insights would also be GREATLY appreciated!
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  #38  
Old 10-13-2011, 10:49 AM
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First of all, welcome to the forum, I don't know the answer but you should probably start a new thread for your question.
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  #39  
Old 10-13-2011, 12:38 PM
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Quote:
Originally Posted by Heimeken
First of all, welcome to the forum, I don't know the answer but you should probably start a new thread for your question.


Talk about waking the dead. Did you see when that last post was made? August...2009

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  #40  
Old 10-15-2011, 07:38 AM
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Back on topic here, looking at the outside, the 300 case looks just like a D20 case, with a different input pattern. Are the internals the same? I know most of the D18 and D20s are interchangeable as for gears and such, is the 300 any different?
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