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Go Back JeepForum.com > Models > Jeep CJ Forum > Time for a tranny swap upgrading to a NP435.

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Unread 03-03-2013, 07:40 AM   #1
78FordF150
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1983 CJ7 
 
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Time for a tranny swap upgrading to a NP435.

Well my T5 finally broke but not the way I expected it to. I was on my way to work in the snow on the highway with the hubs locked in, but in in 2wd when the front drive shaft let loose at the transfer case. As the drive shaft flopped around till I came to a stop it beat the hell out of the exhaust and tranny. Now there is three small cracks in the case letting fluid drip out.

I could pull it out and weld it up but why polish a turd.

I'm going to start ordering parts this week for this conversion as soon as I take the NP435 apart to get a idea what tranny parts I might need while its down. I have done a lot of reading on this swap and think I have a good idea what parts I need. If you can thank of anything else I would appreciate it.

1983 Jeep CJ7 360V8 T5 Dana 300 35in tires 4.56 gears

1. Novac adapter
2. Pilot bushing
3. Tranny mount
4. Novac master rebuild kit.
5. Center force Clutch (not sure witch spline I need yet)
6. Different bell housing
7. Tranny tunnel. (not for sure)
8. Front and rear drive shaft.(need a rear CV anyways.)
9. J.B. stainless twin stick conversion with shift knobs.
10. Front transfer case yoke that takes ubolts instead of straps.
11. Clutch fork (not sure witch one to use.)
12. Seal kit for the dana 300

If there is anything on the list I missed let me know.

I will post up some pics as I go along and I welcome all help and knowledge.

Thanks

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Unread 03-03-2013, 10:21 AM   #2
jurgen24
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I also had a T5. For the clutch disk, I used SACHS Part # BBD4180 10.5 in. OD, 1.0625 in. ID, 10T teeth. I re-used my old bell housing, drill lower holes, fill upper and re-drill.

I also built a new crossmember/ skidplate.
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Unread 03-03-2013, 07:41 PM   #3
78FordF150
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Thanks Jurgen those dim. will come in handy.

I got the tranny partially torn down today. Other than a small parts kit, it looks like I need a new top cover. I haven't had any luck looking online. Does anyone have an idea were I could get a new one?
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Unread 03-03-2013, 08:26 PM   #4
row684
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Quote:
Originally Posted by 78FordF150
Thanks Jurgen those dim. will come in handy.

I got the tranny partially torn down today. Other than a small parts kit, it looks like I need a new top cover. I haven't had any luck looking online. Does anyone have an idea were I could get a new one?
I had the same thing happen to my T5. Have yet to replace it though.
image-3145877578.jpg  
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Unread 03-03-2013, 09:58 PM   #5
jurgen24
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Quote:
Originally Posted by 78FordF150 View Post
Thanks Jurgen those dim. will come in handy.

I got the tranny partially torn down today. Other than a small parts kit, it looks like I need a new top cover. I haven't had any luck looking online. Does anyone have an idea were I could get a new one?
Sure no problem, let me know if you need any other details. BTW, I don't know what your upper RPM is, but with my 258 at 2600rpm, I'm limited to about 60mph, 4.11 gears, 33" tires. Also, the gears are far apart, need to really rev it before a gear change. A few things to get used to when swapping over from the T5......but then that 1st gear, it can pull stumps!
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Unread 03-05-2013, 08:45 AM   #6
78FordF150
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Just a quick update on progress. Ordered some parts yesterday.
From Novac
1. Adaptor
2. Master rebuild kit
3. Tranny mount
4. Pilot bushing
5. Rebuilt top cover for the
NP435 as mine was shot.
From JB conversions
6. Stainless twin sticks
7. Polished shift knobs.
8. Dana 300 seal kit.

I'm still looking for a Dana 300 yoke that takes ubolts instead of straps. I want actual Dana brand. Where can I find one. All I have found is Crown.
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Unread 03-05-2013, 08:52 AM   #7
Matt1981CJ7
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Ford,

Sorry I can't help with yoke.

However, reviewing your list above, you can save some money by going with a LuK brand clutch kit. NAPA carries LuK kits, they call them their "premium" clutch. And they should be about half the price of Centerforce.

FYI, LuK makes CenterForce disks. I thank CSP for enlightening me.

Matt
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Unread 03-05-2013, 09:27 AM   #8
jurgen24
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Quote:
I'm still looking for a Dana 300 yoke that takes ubolts instead of straps. I want actual Dana brand. Where can I find one. All I have found is Crown.
Is that front or rear yoke? For rear I think you will want CV style, specially if you clock D300, my lowest point is now 5" higher. You can get CV yoke (1310 u-joint) from junkyard, Grand Cherokee NP231 front yoke.
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Unread 03-05-2013, 09:43 AM   #9
78FordF150
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Matt thanks for your input. I'm all for saving some coin on this project as the bills are pilling up quick. I have run Centerforce clutches for almost 20 years and they have never let me down. I'm reluctant to try something new that's not proven to me.

I really like the cetrifical weights that are on the preasure plates on the centerforce. I have only slip one a couple of time's and that was on really hard pulls trying to get broken rigs of the trail.

I will look into the luke somemore. Several folks on here have said good things about them.
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My NP435 install [url]http://www.jeepforum.com/forum/f8/time-tranny-swap-upgrading-np435-1487201/[/url]
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Unread 03-05-2013, 09:46 AM   #10
78FordF150
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Jurgen its the front yoke that I need. I will get a new rear yoke from Tom Woods when I get ready for a driveshaft.

I read somewhere that a Dana 30, 44, and 300 take the same yoke. Does anyone know for sure.
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Unread 03-05-2013, 11:30 AM   #11
jumbojeepman
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Quote:
Originally Posted by 78FordF150 View Post

I really like the cetrifical weights that are on the preasure plates on the centerforce. I have only slip one a couple of time's and that was on really hard pulls trying to get broken rigs of the trail.

I will look into the luke somemore. Several folks on here have said good things about them.
The only clutch I ever had a problem with premature slipping in a 4x4 was a Centerforce in my Isuzu P'up.
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Unread 03-05-2013, 12:52 PM   #12
jurgen24
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Quote:
Originally Posted by 78FordF150 View Post
Jurgen its the front yoke that I need. I will get a new rear yoke from Tom Woods when I get ready for a driveshaft.

I read somewhere that a Dana 30, 44, and 300 take the same yoke. Does anyone know for sure.
I can confirm that rear D300 yoke and D30 yoke have the same spline, but not sure about the thickness of yokes, may run into issues with that.
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Unread 03-05-2013, 01:26 PM   #13
Coiz
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Quote:
Originally Posted by 78FordF150 View Post
I read somewhere that a Dana 30, 44, and 300 take the same yoke. Does anyone know for sure.
Yes, they are all the same and interchangeable.
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1979 CJ7, FI 5.0L Ford, NP435, D300, Full floated D44 Detroit, D30 Detroit EZ Locker.
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Unread 03-05-2013, 01:39 PM   #14
78FordF150
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Thanks for the heads up on the yokes.

Been reading up on Luk and Sachs clutches all day. I thought I had my mind made up on the centerforce. Now what.
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Unread 03-05-2013, 02:02 PM   #15
Coiz
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I've always like Centerforce, that said I have a Luk in mine now and have never had a problem with it.
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