Woohoo! Free IDI

[Rot Box]

So I'm trying to figure out what drivetrain I have under this thing. Turns out it is sort of an oddball compared to the IDI's I've had in the past. In the door jam it says manufactured 10 of 84.

For starters I was surprised to see something other than a Sterling in the rear. The rear looks like a Dana and it has 70-18U stamped on the front of the casing with 3.54 written on the tag. Is it safe to say this is a Dana 70U? It has the teardrop housing...

Also the transfercase isn't like the big ol' 1356 in my 91. It looks much smaller, chain drive, aluminum case and all I can make from the stamp on the casing is BorgWarner 1345 (or 1354..) Any ideas? I don't think it is the rare Ford NP208 and definitely not the NP205.

Lastly I'm assuming it has the T--19. Would this be the one with the very low first gear or is it like the T-19 that I had in my 86? I have always toyed with the idea of replacing my ZF-5 with a T19. If this is the T-19 is it a dud or is it a good one? and will my 1356 bolt onto it?

Front is the D44 TTB what a pos! lol.

Thanks for any help!

 

[Simp5782]

Its a bw 1345. ALL drivers side drive NP203,205, 208, NP1345 and 1356 have the same bolt pattern.I think even the 271/273 also. The 208, 1345 and 56 are all light enough that they do not need a mount. The 203/205 you would have to fab up a mount to support the weight. 208/1345/1356 are all chain drive. The 203 is a full time transfer case.

The 70U is right if that is what is stamped. 85 F-250s could have came with a Dana 60, 61, 70 or Sterling. Just find it to be weird with a D44 in the front. Most ALL the time they matched a D50 to the diesel and 460s due to the weight of the engine. My T-19 holds up quite well grossing 30k+ towing and it has NO issues other than kicking out of first if you goose the gas under load.

I wouldnt even bother bolting a 1356 = magnesium case 2.69 Low range, 1345 = aluminum and 2.74 low. They are pretty much the same. the 1345 has more ribs. My opinion sell the 1345 and 1356. get a 203 or a 205 they r pretty easy to find in married configuration. fab up a good mount and your good to go. the 2.05 has a 1.69 low range

I prefer a dana 70 over a sterling all DAY. $190 you can have a nice rear disc setup on the 70.

 

[Rot Box]

Hey thanks for the info That's good to know.

I wish this Dana 70 had 4.10's like my 91 I'd probably end up swapping it in. And yep this is my second IDI with a TTB Dana 44 They eat tie rods and balljoints and everything else like candy

 

[Dieselcrawler]

Put the 70 in your wheeler. Nice smooth housing to drag over things....

 

[dmaxjoe]

The 50ttb was only in supercabs and early crew cabs. Regular cab f250 got the 44hd ttb. And if not mistaken ... before 85 rears for the f250 were dana 60 or 61. I believe the 61 had lefthand threads on drivers side lugs. Thats the way my 84 is.

 

[ocnorb]

The 50ttb was only in supercabs and early crew cabs. Regular cab f250 got the 44hd ttb. And if not mistaken ... before 85 rears for the f250 were dana 60 or 61. I believe the 61 had lefthand threads on drivers side lugs. Thats the way my 84 is.

I have an '85 Dana 70-u with left hand lugs on drivers rear, so its not just the 61.

 

[bbjordan]

Nice score!

If its a chuffing noise coming from the intake, it could just be a blown head gasket.

 

[bike-maker]

As far as I can remember, the diesels came with a Dana 70 rear, gassers had a Dana 60 or 61.
This is until somewhere about 85.5, where they switched to the Sterling. Mine came from the factory with 460, C6, BW1345, Dana 61, Dana 50 TTB.
I researched the difference between BW 1345 and 1356; they are pretty much equal. I had 1 of each when I was bolting my truck together. Only real difference I found was the 1345 had a fixed yoke (which worked with my existing driveshaft), the 1356 was not.