Is this possible? I'd love to not have to do math when looking at the speedometer, and to have simple math when calculating my mileage.
Adjust speedo for bigger tires
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Sure, but you'll have to get a new speedometer with a changeable gearset.
Nevada speedometer can do it.
Nevada Speedometer - Sparks - Sparks, NV
Nevada speedometer can do it.
Nevada Speedometer - Sparks - Sparks, NV
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- #3
Worth a phone call. Am I looking at $$$$ ?
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There are a few different ratio gear sets available for the speedo drive. Look em up in the EPC and do the math for what you have now vs where it needs to be.
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- #7
Stock tires are 28" (right?) and I've got 33's now. What would get me the closest? Are the gears available from Toyota?
The gears used to be available from Mr T, and SOR. Don't know if that's still true. Here's a mud thread that's got some good info.
Speedo Correction
Speedo Correction
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- #9
Thanks, searched for something like that thread and didn't find anything.
Changed my speedometer to one from Speedhut. My Speedhut uses GPS for speed. Regardless of wheel size/tire combo
indicated speed is always accurate.
indicated speed is always accurate.
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- #11
That's actually a really interesting solution, but I'd like to keep the stock speedo. If it can't be re-geared, I can just deal with going 5mph slower.
My 60's speedo is off 11-12% with 3:70's and 33" tires. I looked at changing gears, but never got around to it.
There is a company in NorCal that makes speedo correction boxes. There is a post here somewhere about them,
A little off subject, but, a GPS speedo only measures distance on a flat line. The gps does not take vertical distance into it's distance calculation.
Most users will never notice this, unless you travel in steep terrain and accurate mileage is important.
There is a company in NorCal that makes speedo correction boxes. There is a post here somewhere about them,
A little off subject, but, a GPS speedo only measures distance on a flat line. The gps does not take vertical distance into it's distance calculation.
Most users will never notice this, unless you travel in steep terrain and accurate mileage is important.
I have 31" tires and stock 3:70 gears. My speedo reads 10 mph fast above 30 mph. Odo reads 10% lower (as it should).
I don't care. Easy enough to get used to.
10% is easy to figure for the miles. Who cares what the speedo says anyway? It's not like you're going to get a speeding ticket in a 60.
I don't care. Easy enough to get used to.
10% is easy to figure for the miles. Who cares what the speedo says anyway? It's not like you're going to get a speeding ticket in a 60.
I too have the 31" tires and use the 10% rule. Though I just found this on a MG forum and thought it would be great for my 60 if he could have the threads match.
Classic Auto Innovations
Classic Auto Innovations
I checked mine - I have 16x6.
I changed my speedo gear for one that was supposed to work with my 31" tires. it didn't so they sent another one..it didn't work. finally found out on this site that you also need to change the gear inside the transfer case also to fit the new speedo gear. sorry if this was already mentioned in this thread.
cruisedeisel
Toyota's for life
Oh my turbo 3b can get speeding tickets.
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- #20
Mine too!
Did you end up changing it? If so, was it a pain in the ass? Was the part available/expensive?
