swap.

mystery · 08-17-2013, 10:15 AM

Alright from my previous issues as some of you know about ive been influenced to drop the 13b motor out of a 86-87 rx7 with turbo into my '85 12a, found a good setup on ebay thats going to basically got motor, tranny, cmp and all the attachments just trying to figure out what ill need to get far as the boltup to the rear end because from my research its not boltup without a plate anyone able to point me in the right direction?

GySgtFrank · 08-17-2013, 10:42 AM

MaxdaTrix can sell you a new driveshaft. Which you'll want anyway as the U-joints are not replaceable in most of the RX-7 driveshafts. The early model rear axles 79-83 had a different flange on the differential pinion than the 84-85 axles. I know the stock 85 shaft worked with my NA transmission. I'm unsure whether the TII splines are different than the NA at the transmission or not. If so they can probably put the proper yoke on the front for you. Best bet would be to give them a call and discuss what you want to do with them. You can't use the FC shaft as it is WAY too short.

mystery · 08-18-2013, 07:13 PM

Excellent thanks for the advice frank im most certainlly going to be giving them a call this week and hopefully they can point me to what I need for this build!

08-17-2013, 10:15 AM	#1
mystery Rotary Fan in Training Join Date: Dec 2012 iTrader: (0) Posts: 91 Rep Power: 12	swap. Alright from my previous issues as some of you know about ive been influenced to drop the 13b motor out of a 86-87 rx7 with turbo into my '85 12a, found a good setup on ebay thats going to basically got motor, tranny, cmp and all the attachments just trying to figure out what ill need to get far as the boltup to the rear end because from my research its not boltup without a plate anyone able to point me in the right direction?

08-17-2013, 10:42 AM	#2
GySgtFrank Professional Stick Poker Join Date: Feb 2011 Location: Stafford, Ks. iTrader: (0) Posts: 1,005 Rep Power: 15	MaxdaTrix can sell you a new driveshaft. Which you'll want anyway as the U-joints are not replaceable in most of the RX-7 driveshafts. The early model rear axles 79-83 had a different flange on the differential pinion than the 84-85 axles. I know the stock 85 shaft worked with my NA transmission. I'm unsure whether the TII splines are different than the NA at the transmission or not. If so they can probably put the proper yoke on the front for you. Best bet would be to give them a call and discuss what you want to do with them. You can't use the FC shaft as it is WAY too short. __________________ 1979 SA22C (parts of one anyway) http://rotarycarclub.com/rotary_foru...ad.php?t=15585 1975 MG Midget (building) http://rotarycarclub.com/rotary_foru...ad.php?t=18681 1988 N/A SE model FC, dead stock and less than 85k on the clock. This one actually runs, so I don't fuck with it.

08-18-2013, 07:13 PM	#3
mystery Rotary Fan in Training Join Date: Dec 2012 iTrader: (0) Posts: 91 Rep Power: 12	Excellent thanks for the advice frank im most certainlly going to be giving them a call this week and hopefully they can point me to what I need for this build!