1989 bronco front and rear differentials

[Ray Demanche]

How do I tell what kind of dana I have? I'm trying to put different gears to work with 35'' tires. I have a 5 speed stick, 302- 500hp roller engine.

 

[Skitter302]

Should be a Dana 44 TTB in the Front and Ford 8.8 in the rear. Thats what my 1989 had. Best way to check is to crawl under and check the tags.

 

[miesk5]

Yo Ray,
Welcome!
As Skitter302 advised.
A previous owner/shops may have swapped components since new.
I made a mistake many years ago by telling someone to use the Driver's side label to ID their Rear Differential (axle, pumpkin type, etc.); turned out that a previous owner had swapped a Dana 60 in place of the stock 9 inch,
so, Information, History, ID, pics, etc.:
Differential, 9", 8.8", 10.25" & Dana 44 front pics in 80 through 96 by Kenneth C. @ http://www.badshoeproductions.com/rear.html

See more info by me @ https://www.fullsizebronco.com/threads/where-can-i-find-more-information.438689/#post-6240497

How to Determine Your Axle Gear Ratio – Jedi.com

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Here are the 1989 Ford Bronco EVTM, Emissions (yellowish/red book cover) & Pre-Delivery Manuals, Partial via mrnewland1 in Google Drive @
1989 Service manual - Google Drive
Slow scrolling, so download for faster viewing and to see the table of contents, the search feature, etc.

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf found by BroncMom

1989 Ford Bronco Dealer Brochure

1989 Bronco Lubricant Specifications by Ford via Gary

 

[Jasgeer]

Once you figure out what you have I would suggest 5.38 gears since you have a stick where 5th gear is an over drive of 5.72 (I have the same transmission).