Quote:
Originally Posted by slowmover
Choose with care. Use an online calculator to see gear change effects. Lay out the stock ratio versus rpm & speed and then do the same with contemplated choices.
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With a 4.10 ratio and the factory .71 overdrive it would be running right around 1900rpm at 60mph. Probably less than ideal for open highway (it's still within the "butter zone for piston speed, I believe) but it may allow towing in 4th w/ lockup. As-is you HAVE to lock it into 3rd with a trailer of any size in tow or else transmission burn-up will be inevitable as it hunts all over the place for gears/ TC lockup. Fortunately it is eager to lock up in 3rd (and will pretty much stay there) but mileage is horrendous with the TT in tow.