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Speedometer reads way off… luv originally came with 4:10 gears, they went south so I put in a 4:56 by mistake and it would read way off …. Now I put 4:10 back in it and it is still reads like the 4:56 but the rpm’s are down like they used to be… what would cause it to still read way high? And what are the other gears I could put into the trany to drop it down it’s about 15 to 20 mph off... hope you understood what i was trying to say

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My old but now gone Luv...

The speedo in the LUV's are driven off of the transmission output shaft. By changing the tire size as you have from stock to lower profiles (or smaller tires) this will have the speedo reading fast. I have in the past seen speedo calibration kits but it has been years since.

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Certified pilots, looking down on people since 1903.

so these don’t have like others do ... different colored gears for different ratios that slip into where the cable goes into the trany ?

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My old but now gone Luv...

I dont believe so, I just checked the parts manual and no luck.

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Certified pilots, looking down on people since 1903.

yeah i just dough mine out also to take a look, still cant figure out why it didn’t go back like before when it had the 4:10 gears, it was only about 5 mph off but still reads like the 4:56 gears 15 to 20 mph off... but at least my rpms are back to normal, about 65 pmh = 3500rpm…. Did find out that the 76 has 2/20 gear in the trany now need to find out what the 79 had …. My book is for the 76 … ok found out the 81/82 has a gear drive of 6/17 but that wont work different type … looks like the 71/75 wont work at all so any one have books from 77 to 80 that would have the gear drive ratio in them

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My old but now gone Luv...

78 is 6/20 as per my manual

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Certified pilots, looking down on people since 1903.

well i guess i could always leave it to my son to fix, he gets the truck anyway when he gets out of the army.... i will be building the cosworth luv at that time for me

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My old but now gone Luv...

There are other speedo gears out there. I'm not sure what others will fit, but the usual trans swap suspects are an option. Impulse, PUPs, maybe an older 75 luv tranny that was set up for the 4.56 gears.

It is damn odd that swapping the rear end gears didn't fix it, something else must have changed since it read correctly like your tire size.

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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)

MEPR: Man, my 4x4 makes all other LUVs look good

if u want igot a tranny sitting right here that i'm going to junk it's original to my '75.
i'll pull the speedo gear for ya and send it just cover s/h and she's yours.
wouldn't be next day air cause nothing gets to or from alaska by the next day lol

75 wont work... its a different design... thanks anyway

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My old but now gone Luv...

well dug thru my hanes manual and found series 11&12 speedo ratio is 6/17 then they show 8&9 gear backlash but not speedo gear ratio. now 1&2 have a 17/5 ratio and 3&4 have a 5/18 ratio

i'll be going to the junkyard this sat&sun to strip all i can before they plow half the yard away ican grab the speedo gears out of a 4x4 and a auto tranny if you want to try them?

yes i would like that... thanks...I know i my books the 72/75 looked different but ill try anything from 72/ i guess, you should be able to see if there are any differences when you pull them... thanks again

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My old but now gone Luv...

no prob. anything to help the luv cause lol