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help speedo issues
Posted: Wed May 14, 2008 4:47 pm
by jungles
ive got a 93 wt swb sierra with 31s and a 1litre transfer case
want to get speedo right 4 engineer found a place called marks adaptors at vic send up ratio box 4 $170 thing is not sure what ratio
ihad a mate drive in front on cruise control at 70 my speedo read 50 so i thought 40% but then did tyre size conversion and it equals to 14.84% what the
could the transfer case be th e problem any help would be greatly appreiciated
thanks jimmy
Posted: Wed May 14, 2008 6:54 pm
by alien
hahaah i had this same issue - search posts by me (alien) with speedo in the subject... pretty sure its called "all about the speedo".
Anyways - my 5.14tcase is almost perfectly bringing my gearing back to stock... so when a speedo guy tested it by RPM on the cable, it was correct, even though it was out by around 20%... the solution was adding about 20mm to the spring on the speedo. We then checked by GPS and its all good now, however a ratio box will say its way out of whack cos of the gearing =)
Posted: Thu May 15, 2008 12:25 pm
by lay80n
hey Jungles,
If you want to do the test a bit more acutatley, PM me as i can grab the GPS to check it.
Layto....
Posted: Thu May 15, 2008 2:29 pm
by stumped
there's a local guy in newy who those speedo boxes to make it all work right. but i deleted his name and number when i got rid of the zook, lol. if you ring around a few speedo type places and ask if they can build or know anyone who builds that kinda box then i'm sure u'll find him pretty easily...
Posted: Thu May 15, 2008 5:01 pm
by alien
like i said, you dont need a box - its a waste of money - just lengthen the spring and check with a GPS =)
Posted: Fri May 16, 2008 10:52 am
by ScrawnC
alien wrote:like i said, you dont need a box
Why don't people listen?
