How to correct speedo after changing to 3.73 on '88 Cougar March 15, 2016, 12:19:54 PM Hey guys,I'm looking for some input and help to figure out what I need to do to correct my speedo after I get a set of 3.73 gears installed on my 1988 Cougar XR7 5.0L auto with 8.8 trak-lok rear end. Car currently has factory 3.08 gears and has mechanical gauges but does not use a speedo cable. There seems to be many types of driven gears and drive gears and I'm not sure how to proceed. Your help is appreciated. Thanks! Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #1 – March 15, 2016, 03:18:28 PM This gear: https://lmr.com/item/LRS-17271J-K/83-95-Mustang-23-Tooth-Speedo-Gear-Kit-AutoI use it in my Thunderbird with 3.73 gears. Just pop the old one off the vehicle speed sensor and pop the 23 tooth gear on in its place. Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #2 – March 15, 2016, 04:38:59 PM Wow. Nice ride sir!!! Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #3 – March 15, 2016, 04:51:49 PM Nice!! Sounds like it's worked well for you thunderjet302, so I'll order it up and put it in. Thanks for the tip and for the link for purchasing it. I'm looking forward to seeing what these 3.73's do for the car!![ATTACH=CONFIG]37313[/ATTACH] Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #4 – March 15, 2016, 04:56:47 PM Thank-you. You've got a nice Anni there Zondac12! Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #5 – March 15, 2016, 06:45:36 PM It's simply ridiculous sometimes, to even imagine one of these cars looking pretty this far north! Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #6 – March 15, 2016, 10:39:40 PM Whereabouts in Ontario are you? I live in Caledon, and am a parts guy at the dealer in Waterloo. Most of the speedo gears are still available to order from Ford at a reasonable price. Shoot me a p.m. if I can help.That's a great looking cat, the Saleen style wheels look at home on there.cheersEd Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #7 – March 16, 2016, 09:34:44 AM Fast Ed, you've got a bit of a trek to get to work. I'm in Cambridge. When I was trying to figure out this speedo gear change last fall I found out that Ford only made up to a 21 tooth gear. According to ^thunderjet302^ I need a 23 tooth which I guess is only available through the aftermarket. And thanks for the compliment on the wheels, I was happy how they finished the car off nicely!@ ZondaC12 - I know what you mean, in the last couple of years I've seen only one of these cars and it was very nice. Hard to find anymore. That should put the value of these up shouldn't it? LOL Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #8 – March 16, 2016, 05:22:57 PM Mine is still a little off. I cant remember if I used the 21 or 23 tooth though, its been too long ago. LOL Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #9 – March 18, 2016, 12:00:33 AM The "aftermarket" 23 tooth speedo gears are just a Jeep part, you can order one from the Chrysler dealer as part number J3167393. The issue with the 23 tooth version is that the teeth are very fine because of trying to fit so many on such a small plastic gear ... many people experience premature wear on them. Upside is, not a lot of money to replace one if it does happen.cheersEd Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #10 – March 18, 2016, 09:51:33 AM If trans has a 8 tooth gear cut into output shaft a 23 is required for 3.73, this is by far what most passenger car AOD trans have... The performance(Super Coupe) & truck versions have a 7 tooth output so 21 will match 3.73 using those trans... Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #11 – March 19, 2016, 11:24:50 AM I've heard conflicting stories about whether my '88 AOD is a 7 tooth or an 8 tooth drive. How do you know for certain, can you see the drive gear well enough through the VSS hole?Also, if the 23 tooth gear does suffer premature wear does it mess up the "drive" gear as well? Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #12 – March 25, 2016, 07:50:34 PM Wow NICE 88 xr7, just like mine except mine has the side stripes. Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #13 – March 27, 2016, 07:05:12 AM Quote from: AT8 Cat;454392I've heard conflicting stories about whether my '88 AOD is a 7 tooth or an 8 tooth drive. How do you know for certain, can you see the drive gear well enough through the VSS hole?Also, if the 23 tooth gear does suffer premature wear does it mess up the "drive" gear as well?Following your thread as I need to order a new gear as well.( just swapped in a 3.55 TC rear axle) What did you decide on your AOD? 7 tooth or 8? I have an 87 5.0 Bird with AOD. TurboCoupe 50 said MOST came with 8 tooth so I may get mine tomorrow. Ray Quote Selected
How to correct speedo after changing to 3.73 on '88 Cougar Reply #14 – March 27, 2016, 07:35:09 PM Could you post some more pics of that car its gorgeous also where did you get those sc wheels and how well do they fit? Quote Selected
Topic: How to correct speedo after changing to 3.73 on '88 Cougar (Read 9229 times)
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