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275/60R15... 28" tire. I don't think so.

I went with Motive 3.73 gears. Very happy. Should reach the recommended 500 mile break in after the holidays. I am planning to pull the center section, clean the case again, check all clearances and refill with Valvoline conventional 85w140 and 4 ounces of MOPAR Suregrip additive. I have the...

Right... 1.45 is not a percentage... It's a multipier.

I'm fine with that. I just figured if someone already did it and put in a 35 they could tell me if they were a little high or a little low and then I'd know which way to go with my gear selection.

Presently the speedometer is off by a factor of about 1.45, so 79.5 mph on my speedometer is 55 mph actual on my GPS.

Don't know. I won't know what's in there now until I remove it and I'd rather not remove it until I have one to replace it.

Anyone with 3.73 gears and 275/60R15 rear tires... what 727 speedometer gear did you use? Charts say Red 36 teeth but I rather hear from someone who made a change and ended up with an accurate speedo. 1972 Duster with early 70's 727. Thanks...

Thanks to everyone for their input. I realize that the people that responded have different set ups in their cars and they use their cars differently. Clearly, it explains why there are so many opinions on which gears to run. I asked the questions knowing fully that there was no one right...

I know this is an old post but I was doing a search on a similar topic and just saw this. I am wondering if that 2,600 RPM at 65mph is correct. The 275/60R15 tire is 28" tall and with 3.73 gears you should be a hair under 3,000 RPM at 65 according to the on-line RPM calculators. Wondering why...

Thank you all for the opinions and suggestions. Much appreciated. I drove about 45 minutes to a car show today in Punta Gorda, FL. A good portion was secondary roads with a 60 mph speed limit. Traffic was moving at least 65. My 3.23s were giving me between 2,500 and 2,600 rpm. 3.55s would have...

Probably me.

I would expect to get some spray on my quarters if I spin my tires but if you notice all of my questions are regarding driving on a hot road none mention doing burnouts from light to light. If I did a burn out and I got spray on my quarter panel it would be expected and I'm fine with that. I...

Right... but I'm guessing that's from spinning, not from just "spirited" driving. Love that word...

Thanks. Not worried about the strip. It's more of a show car that attracts people with something to prove on the street. I don't look for street races. One of my car show friends has a small block 1967 El Camino with Nitto 555R 275/60r-15. They don't pick up anything... even when it's 98F here...

Let's say both lasted the same and, they both performed the same in the rain, and they both cost the same. I'm saying that because none of that matters to me. My concern is the MT getting noticeably sticky from a 30 mile drive on a dry hot day. Other than cruise nights and driving around town I...

Thanks, so zero issues with them getting sticky and picking up pebbles and small road debris from daily drives on hot days? No rubber spray getting up on lower rear quarter... ever?

I am in the drag radial selection process now like many of you. Narrowed my selection down to MT ET Street S/S and Nitto 555R. I will not be taking this car to the track. Just "street driven". It's a mild build 440 automatic Duster with 3.23 SG. I live in Florida. Hot road surfaces but I will...

Large bolt pattern. 215/70R-14 fronts on 6" rims, 275/60R-15 rears on 8" rims. Thank you!

Some additional information on the BFGs. What I did was to go to a shopping center near me that had gone out of business. I had a giant empty area to do a few tests. I got some pieces of chalk and chalked the rear tires from inboard edge to outboard edge. Checked my tire pressure and did a...

Thank you... I appreciate the info. I have stock tubs and leafs are re-located inboard. A 295/50 BFG is 26.6" diameter. It would fit if I mounted it on an 8"... but will rub the inside tub wall on a 10". Not interested anyway. It Looks like a skateboard wheel in the Duster wheel well. A 295/55...

I'm liking the Nitto's. What size Nitto's are you running? What tires do you have up front (brand and size)? Thanks

Not sure if if the TC is stock. Somewhat tight. It was in the car when I got it. A few weights welded on by someone other than Mopar. B&M shift kit. Shifts 1st to 2nd with no slip and a slight bang at any speed. If you jump on it she leaves 20 feet or so of rubber and rear of car slides left a...

I can address tire spin. I was planning on some better rubber too as I mentioned back there somewhere. BFG Radial T/A's on it now look nice but don't hook. Nitto or MT ET S/S streetable drag radials are being considered. So you think a gear change from 3.23 to 3.73 and a drag radial won't make a...

Hoping to gain more "throw you back in your seat". More "exhilaration". Faster 0 to 60.

So I asked 3 performance related auto shops here how much they charge to change the gears with me supplying the Motive gears, correct fluid and the install kit. All four shops were between 4 and 4.5 hours labor. I went to a 4th shop that I have used before for difficult stuff that I don't do or...

Have you played with this? Gear Ratios, RPM and Tire Diameter to MPH with Shift Points Calculator

2982 rpm vs 3050 rpm... so, yes. Very close.

Are you happy with the 3.55 with 26" tire for around town or would you like to try a different gear? If so, which gear would you like to try for the street?

Do you track the car? On the street, are you happy with the 4.10 or do you wish you could try a different gear? If so what gear would you like to try?