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Old Jan 21, 2005 | 09:03 PM
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differential ID question

The axle id code on the door jamb,

90 model f-150 is labeled I9, or 19- can't really tell.

84 Big Bronco is labeled UY.

What kind of differential do these codes describe?

Thanks

okiebronc
 
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Old Jan 21, 2005 | 09:29 PM
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Your F150's code means a 3.55 ratio with an open differential (no limited slip). Rear axle is a Ford 8.8". If it's 4wd, the front axle is a Dana 44 TTB (twin traction beam).

The 84 Bronco rear axle should be a Ford 9". The front is the same as the F150 4wd. Sorry, I don't recognize code UY.
 
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Old Jan 21, 2005 | 09:43 PM
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thanks

THanks for the info, I screwed up on the UY, all the characters on the jamb sticker are shifted ove one place for some reason. It has a 19 code also on the Bronco. It has the Clark 4 w/overdrive, not bad but needs a locker in the rear.

And the F150 is a 4wd also, I thought it had a limited slip rear end in it. Both rear wheels seem to get good traction and i'm pretty sure it is original.

THanks again,
okiebronc
 
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Old Jan 21, 2005 | 11:38 PM
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Unless someone put a limited slip in it, the code indicates an open diff. The limited slip code is 'H9'.

Do you know anything about the Clark transmission? It sounds interesting.
 
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Old Jan 22, 2005 | 04:28 PM
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Clark Tranny

I don't know much about this tranny, I just got the truck recently. A guy was needing money badly, you know the story. Motor recently been through, new flowmasters, 3inch lift, 31" new rubber, all reciepts in the glove box. 1200 bucks.

The granny in this box is really low compared to the F-150, the overdrive has been great on the highway. I have taken the truck on two trips roundtripping over 800 miles, great gas and no troubles. THe tranny is a little sloppy in the shifter though and starting to make a whining noise in 1st and 2nd. It has 167,000 miles on it, probably time for an overhaul on it.

okiebronc
 
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Old Jan 23, 2005 | 04:53 AM
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It has a granny and an overdrive? That's interesting... Is this tranny aluminum case or iron? One-piece case/bellhousing, or seperate bellhousing? Where is the location of the reverse gear on the shifter?
 
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Old Jan 23, 2005 | 04:01 PM
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missing tag

the tag is missing on my 9" someone has written J20619 on the pumpkin does any one have a clue?
 
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Old Jan 26, 2005 | 09:59 PM
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socal ....

The tranny is seperate from the bell housing, it is cast iron and reverse is down and all the way right..


G 2

1 O R


It is the first tranny I have ever seen like it and have driven standards, mostly Fords, all my life. It is also the lowest Granny I have ever driven. Low-loc and Granny is prob 2-4mph at 2500 rpm.
 
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Old Jan 26, 2005 | 10:54 PM
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Hmmm.... That tranny has me scratching my head... The description sounds like it could be an NP435 or T18, but not with an overdrive gear. There are a few overdrive 4-speeds, but none that I know of with a granny low first. Does this transmission have a PTO access plate on it? If so, what side? Does the shifter come out the top of the case or does it shift off the side? Any other distinguishing markings on it? Is it full-synchro or only synchro'd on 2, 3 and 4? Sorry for all the questions, I'm just really interested in this cool transmission!

You said the t-case has 'Lo-Loc'. Do you mean that like an NP203 full-time case? That '84 Bronco should have an NP208 part-time case if I remember correctly. Of course if has been swapped it could be anything....
 

Last edited by SoCalDesertRider; Jan 26, 2005 at 10:57 PM.
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Old Jan 27, 2005 | 05:25 PM
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No PTO plates, 1st gear isn't synced, shifter comes in the top.

I belive the transfer case is the NP-208, I just meant 4 Lo.

Okiebronc
 
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Old Jan 27, 2005 | 09:46 PM
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I'll see what I can dig up about it. Still sounds really interesting! I'd imagine with that wide of ratio spread in a 4spd, you must have to really wind it out in each gear!? Thanks for posting those details.
 
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