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Hello, I'm currently partly rebuilding the engine from my 1969 Thunderbird. The upper rear main seal is making trouble. Lower was easy, because I just had to remove the cap and than could peel it off. The upper half won't come out at the moment. Easiest way would be to remove the crankshaft...

Hello, is there any valid reason why I shouldn't fill some 15W40 dino oil in my NP231? Those t-cases are super simple whith a chain and some gears. I read they basically just need ANY lubrication. What about some Type F fluid? Those two are what I have on hand and I need to fill it tomorrow...

I´m looking for a way to lower my Tbird. Moog has this great list of all their springs. Rockauto lists part # 8314 for front and 8545 for rear application. The original Ford Specifications form says a front weight of 2495lb and rear weight of 2034lb for my vehicle. I made a Excel Sheet with...

Hello, I'm a 69 Tbird 429cui driver from Germany. Ford 385 engines (and Big Blocks in general) are rare over here, so it's hard to find qualified help. My engine rattles pretty loud under load. Moreover it flares a lot of (probably bluish) smoke from the exhaust, when quickly pushing the pedal...

I just purchased a beautiful Ford Thunderbird Tudor Hardtop from 1969. Now I´m about to change engine and transmission fluids and other parts that need maintenance from time to time. I´m not sure what to fill in the C6 transmission. I already read something about Type F. Or should I use Dexron...

Hello, is it possible to simply replace the spider gears from a Dana 44HD trac loc in a ´97 ZJ with open diff spider gears? To specify it a little more.. using this kit instead of this one without further changes?! Thanks and kind regards.

Hello, the track lock in my Dana 44A rear axle seems to be gone/not working anymore. Do I still need to fill the Friction Modifier in there? Thanks and kind regards.

Hello, I found this website, which seems to be one of the #1 addresses concerning oil questions, especially for me it is perfect, because the Grand Cherokee ist quite rare in europe (germany). So my question is, whether it is okay to fill 0W-30 into the mentioned engine, or might it be bad for...