automatic to manual

Killa B · 12-03-2011, 03:17 AM

Hello i have found a manual transmission in a non turbo 86.5 supra could i use this in my automatic non turbo 89 with the 86.5 ecu?

cre · 12-04-2011, 12:02 AM

Yes. Aside from installing the required mechanical components (also requires a different driveshaft and possibly flywheel) you remove the transmission computer and reroute or bypass the neutral start switch. If the transmission is from a Turbo model then you may want to swap differentials as well so that the speedometer and odometer are accurate. Do note that the Turbo's manual transmission (R154) is a good bit heavier than the N/A's (W58) and is a little notchier (doesn't shift quite as smoothly).

Ranma · 12-04-2011, 12:47 AM

It would be easier for you to buy a Supra with a manual transmission. Conversion is a pain in the butt you do not need. Funny I have a 5 speed but am "lazy" and wish I had an automatic.

Killa B · 12-08-2011, 04:31 AM

Is the non turbo manual an R154 as well? is this conversion going to cause a lot of problems? i have herd conversions like this sometimes do and this is my everyday driver so i still need it to be reliable. automatics are more luxurious but i just like shifting gears lol

87hilux7mge · 12-08-2011, 04:35 AM

no, the N/A trannies were w58's. you could put a turbo tranny behind an n/a, but it takes more power to turn and shifts harder. unsure what you would need to make the speedo read right.

cre · 12-09-2011, 01:43 AM

The speedometers for all MKIIIs (all Toyotas with mechanical speedometers, I think) run at the same input:speed ratio.... In other words they may all be interchanged and they'll report the same speed. The speed at which the cable rotates is another story; It's a calculation of tire circumference, end gear ratio, transmission worm gear and the driven gear which then connects to the speedometer cable. If you change any of these you upset the accuracy of both odometer and speedometer.

While you can recalibrate the speedometer, you can not recalibrate the odometer. Ideally, you would change the driven gear so that it matches the rest of your setup as closely as possible but that's not always an option.... the W58 uses a different size driven gear than the R154 and A134E, so you can't just swap them. I never managed to find one but if you swap in a W58 and have a GTE LSD you might have luck finding a compatible driven gear from another Toyota which was equipped with the same ratio end gear and a W series transmission.

Killa B · 12-12-2011, 01:04 AM

what about the 86 supra will it be able to run with the ecu out of my 89? Like i said they are both nonturbo's the 86 is manual the 89 is automatic

cre · 12-12-2011, 03:54 AM

Not likely. If the plug recepticles on the ECUs are different colors then they're not compatible (not entirely true for the 7M-GE ECUs, but there are a few reasons you still want to avoid mixing the two). It isn't a big deal, as I mentioned before the A/T ECU will be fine with a manual transmission and the ECT computer disconnected.

Killa B · 12-14-2011, 11:11 PM

Okay thank you

12-03-2011, 03:17 AM	#1
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	automatic to manual Hello i have found a manual transmission in a non turbo 86.5 supra could i use this in my automatic non turbo 89 with the 86.5 ecu? __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-04-2011, 12:02 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Yes. Aside from installing the required mechanical components (also requires a different driveshaft and possibly flywheel) you remove the transmission computer and reroute or bypass the neutral start switch. If the transmission is from a Turbo model then you may want to swap differentials as well so that the speedometer and odometer are accurate. Do note that the Turbo's manual transmission (R154) is a good bit heavier than the N/A's (W58) and is a little notchier (doesn't shift quite as smoothly). __________________ 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 --->

12-04-2011, 12:47 AM	#3
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	It would be easier for you to buy a Supra with a manual transmission. Conversion is a pain in the butt you do not need. Funny I have a 5 speed but am "lazy" and wish I had an automatic. __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

12-08-2011, 04:31 AM	#4
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	Is the non turbo manual an R154 as well? is this conversion going to cause a lot of problems? i have herd conversions like this sometimes do and this is my everyday driver so i still need it to be reliable. automatics are more luxurious but i just like shifting gears lol __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-08-2011, 04:35 AM	#5
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	no, the N/A trannies were w58's. you could put a turbo tranny behind an n/a, but it takes more power to turn and shifts harder. unsure what you would need to make the speedo read right. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

12-09-2011, 01:43 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The speedometers for all MKIIIs (all Toyotas with mechanical speedometers, I think) run at the same input:speed ratio.... In other words they may all be interchanged and they'll report the same speed. The speed at which the cable rotates is another story; It's a calculation of tire circumference, end gear ratio, transmission worm gear and the driven gear which then connects to the speedometer cable. If you change any of these you upset the accuracy of both odometer and speedometer. While you can recalibrate the speedometer, you can not recalibrate the odometer. Ideally, you would change the driven gear so that it matches the rest of your setup as closely as possible but that's not always an option.... the W58 uses a different size driven gear than the R154 and A134E, so you can't just swap them. I never managed to find one but if you swap in a W58 and have a GTE LSD you might have luck finding a compatible driven gear from another Toyota which was equipped with the same ratio end gear and a W series transmission. __________________ 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 --->

12-12-2011, 01:04 AM	#7
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	what about the 86 supra will it be able to run with the ecu out of my 89? Like i said they are both nonturbo's the 86 is manual the 89 is automatic __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-12-2011, 03:54 AM	#8
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Not likely. If the plug recepticles on the ECUs are different colors then they're not compatible (not entirely true for the 7M-GE ECUs, but there are a few reasons you still want to avoid mixing the two). It isn't a big deal, as I mentioned before the A/T ECU will be fine with a manual transmission and the ECT computer disconnected. __________________ 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 --->

12-14-2011, 11:11 PM	#9
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	Okay thank you __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

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