speedo problem

87hilux7mge · 04-16-2011, 09:45 AM

had alot of sbc's, including my old maro with a 375 hp 360 cubic incher with a wct5 and 3.73 posi. one in a supra would be fun with all the low end torque, move the heavy chassis alot easier from a stop.

neway, you will prolly have to get aftermarket gauges and use the stock th350 cable. or see if you can find the toyota speedo gear sizes (contact dealerships) and then find corresponding chevy ones to match. that would be alot of work and research, for possible wrong end results. a full set of autometer gauges is only about 200 bux, and you could calibrate them to whatever application you have, usually.

cre · 04-16-2011, 11:17 PM

You're not going to get an accurate speed by just running the cable to the Chevy tranny... Find a shop (local or online) which specializes in speedometers (yes they do exist) and get an adapter made... It's a little gear box which you run a short cable from your tranny into and out of it you run the Toyota tranny's cable. They should have the ratios for each, if not the RPM for Toyota speedos is the same for all Toyotas of this vintage and then just get them the end gear ratio that you're running and the tooth count off the driven gear.

Good luck and have fun!

04-16-2011, 09:45 AM	#1
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	had alot of sbc's, including my old maro with a 375 hp 360 cubic incher with a wct5 and 3.73 posi. one in a supra would be fun with all the low end torque, move the heavy chassis alot easier from a stop. neway, you will prolly have to get aftermarket gauges and use the stock th350 cable. or see if you can find the toyota speedo gear sizes (contact dealerships) and then find corresponding chevy ones to match. that would be alot of work and research, for possible wrong end results. a full set of autometer gauges is only about 200 bux, and you could calibrate them to whatever application you have, usually. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

04-16-2011, 11:17 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	You're not going to get an accurate speed by just running the cable to the Chevy tranny... Find a shop (local or online) which specializes in speedometers (yes they do exist) and get an adapter made... It's a little gear box which you run a short cable from your tranny into and out of it you run the Toyota tranny's cable. They should have the ratios for each, if not the RPM for Toyota speedos is the same for all Toyotas of this vintage and then just get them the end gear ratio that you're running and the tooth count off the driven gear. Good luck and have fun! __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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